1
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Palmer BJ, Almgren AS, Johnson CGM, Myers AT, Cannon WR. BMX: Biological modelling and interface exchange. Sci Rep 2023; 13:12235. [PMID: 37507417 PMCID: PMC10382537 DOI: 10.1038/s41598-023-39150-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023] Open
Abstract
High performance computing has a great potential to provide a range of significant benefits for investigating biological systems. These systems often present large modelling problems with many coupled subsystems, such as when studying colonies of bacteria cells. The aim to understand cell colonies has generated substantial interest as they can have strong economic and societal impacts through their roles in in industrial bioreactors and complex community structures, called biofilms, found in clinical settings. Investigating these communities through realistic models can rapidly exceed the capabilities of current serial software. Here, we introduce BMX, a software system developed for the high performance modelling of large cell communities by utilising GPU acceleration. BMX builds upon the AMRex adaptive mesh refinement package to efficiently model cell colony formation under realistic laboratory conditions. Using simple test scenarios with varying nutrient availability, we show that BMX is capable of correctly reproducing observed behavior of bacterial colonies on realistic time scales demonstrating a potential application of high performance computing to colony modelling. The open source software is available from the zenodo repository https://doi.org/10.5281/zenodo.8084270 under the BSD-2-Clause licence.
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Affiliation(s)
- Bruce J Palmer
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Washington, USA
| | - Ann S Almgren
- Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - Connah G M Johnson
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Washington, USA.
| | - Andrew T Myers
- Lawrence Berkeley National Laboratory, Berkeley, CA, USA
| | - William R Cannon
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Washington, USA
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2
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Robertson TBR, Bannister RC, Cartlidge TAA, Hugger T, Breham S, Zick K, Engelke F, Thompson S, Pileio G. A dual-core NMR system for field-cycling singlet assisted diffusion NMR. Front Chem 2023; 11:1229586. [PMID: 37476652 PMCID: PMC10354561 DOI: 10.3389/fchem.2023.1229586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 06/22/2023] [Indexed: 07/22/2023] Open
Abstract
Long-lived singlet spin order offers the possibility to extend the spin memory by more than an order of magnitude. This enhancement can be used, among other applications, to assist NMR diffusion experiments in porous media where the extended lifetime of singlet spin order can be used to gain information about structural features of the medium as well as the dynamics of the imbibed phase. Other than offering the possibility to explore longer diffusion times of the order of many minutes that, for example, gives unprecedented access to tortuosity in structures with interconnected pores, singlet order has the important advantage to be immune to the internal field gradients generated by magnetic susceptibility inhomogeneities. These inhomogeneities, however, are responsible for very short T2 decay constants in high magnetic field and this precludes access to the singlet order in the first instance. To overcome this difficulty and take advantage of singlet order in diffusion experiments in porous media, we have here developed a dual-core system with radiofrequency and 3-axis pulsed field gradients facilities in low magnetic field, for preparation and manipulation of singlet order and a probe, in high magnetic field, for polarisation and detection. The system operates in field-cycling and can be used for a variety of NMR experiments including diffusion tensor imaging (both singlet assisted and not). In this paper we present and discuss the new hardware and its calibration, and demonstrate its capabilities through a variety of examples.
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Affiliation(s)
| | - Rose C. Bannister
- School of Chemistry, University of Southampton, Southampton, United Kingdom
| | | | - Thimo Hugger
- Bruker Biospin GmbH, Silberstreifen, Rheinstetten, Germany
| | | | - Klaus Zick
- Bruker Biospin GmbH, Silberstreifen, Rheinstetten, Germany
| | - Frank Engelke
- Bruker Biospin GmbH, Silberstreifen, Rheinstetten, Germany
| | - Sam Thompson
- School of Chemistry, University of Southampton, Southampton, United Kingdom
| | - Giuseppe Pileio
- School of Chemistry, University of Southampton, Southampton, United Kingdom
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3
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Wernert V, Nguyen KL, Levitz P, Coasne B, Denoyel R. Impact of surface diffusion on transport through porous materials. J Chromatogr A 2022; 1665:462823. [DOI: 10.1016/j.chroma.2022.462823] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/03/2022] [Accepted: 01/10/2022] [Indexed: 11/24/2022]
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4
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Conzelmann N, Partl M, Clemens F, Müller C, Poulikakos L. Effect of artificial aggregate shapes on the porosity, tortuosity and permeability of their packings. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.11.063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Numerical study of the hydraulic tortuosity for fluid flow through elliptical particle packings. POWDER TECHNOL 2022. [DOI: 10.1016/j.powtec.2021.117047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Lattice-Boltzmann computation of hydraulic pore-to-pore conductance in packed beds of uniform spheres. Chem Eng Sci 2020. [DOI: 10.1016/j.ces.2020.115798] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Marafini E, La Rocca M, Fiori A, Battiato I, Prestininzi P. Suitability of 2D modelling to evaluate flow properties in 3D porous media. Transp Porous Media 2020. [DOI: 10.1007/s11242-020-01447-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AbstractThe employment of 2D models to investigate the properties of 3D flows in porous media is ubiquitous in the literature. The limitations of such approaches are often overlooked. Here, we assess to which extent 2D flows in porous media are suitable representations of 3D flows. To this purpose, we compare representative elementary volume (REV) scales obtained by 2D and 3D numerical simulations of flow in porous media. The stationarity of several quantities, namely porosity, permeability, mean and variance of velocity, is evaluated in terms of both classical and innovative statistics. The variance of velocity, strictly connected to the hydrodynamic dispersion, is included in the analysis in order to extend conclusions to transport phenomena. Pore scale flow is simulated by means of a Lattice Boltzmann model. The results from pore scale simulations point out that the 2D approach often leads to inconsistent results, due to the profound difference between 2D and 3D flows through porous media. We employ the error in the evaluation of REV as a quantitative measure for the reliability of a 2D approach. Moreover, we show that the acceptance threshold for a 2D representation to be valid strongly depends on which flow/transport quantity is sought.
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8
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Gritti F, Hochstrasser J, Svidrytski A, Hlushkou D, Tallarek U. Morphology-transport relationships in liquid chromatography: Application to method development in size exclusion chromatography. J Chromatogr A 2020; 1620:460991. [DOI: 10.1016/j.chroma.2020.460991] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/13/2020] [Accepted: 02/20/2020] [Indexed: 12/14/2022]
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9
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Hochstrasser J, Svidrytski A, Höltzel A, Priamushko T, Kleitz F, Wang W, Kübel C, Tallarek U. Morphology-transport relationships for SBA-15 and KIT-6 ordered mesoporous silicas. Phys Chem Chem Phys 2020; 22:11314-11326. [PMID: 32406894 DOI: 10.1039/d0cp01861a] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Quantitative morphology-transport relationships are derived for ordered mesoporous silicas through direct numerical simulation of hindered diffusion in realistic geometrical models of the pore space obtained from physical reconstruction by electron tomography. We monitor accessible porosity and effective diffusion coefficients resulting from steric and hydrodynamic interactions between passive tracers and the pore space confinement as a function of λ = dtracer/dmeso (ratio of tracer diameter to mean mesopore diameter) in SBA-15 (dmeso = 9.1 nm) and KIT-6 (dmeso = 10.5 nm) silica samples. For λ = 0, the pointlike tracers reproduce the true diffusive tortuosities. For 0 ≤λ < 0.5, the derived hindrance factor quantifies the extent to which diffusion of finite-size tracers through the materials is hindered compared with free diffusion in the bulk liquid. The hindrance factor connects the transport properties of the ordered silicas to their mesopore space morphologies and enables quantitative comparison with random mesoporous silicas. Key feature of the ordered silicas is a narrow, symmetric mesopore size distribution (∼10% relative standard deviation), which engenders a sharper decline of the accessible-porosity window with increasing λ than observed for random silicas with their wide, asymmetric mesopore size distributions. As support structures, ordered mesoporous silicas should offer benefits for applications where spatial confinement effects and molecular size-selectivity are of prime importance. On the other hand, random mesoporous silicas enable higher diffusivities for λ > 0.3, because the larger pores carry most of the diffusive flux and keep pathways open when smaller pores have closed off.
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Affiliation(s)
- Janika Hochstrasser
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany.
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10
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Schultze-Jena A, Boon M, de Winter D, Bussmann P, Janssen A, van der Padt A. Predicting intraparticle diffusivity as function of stationary phase characteristics in preparative chromatography. J Chromatogr A 2020; 1613:460688. [DOI: 10.1016/j.chroma.2019.460688] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/04/2019] [Accepted: 11/06/2019] [Indexed: 10/25/2022]
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11
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Hlushkou D, Tallarek U. Analysis of microstructure–effective diffusivity relationships for the interparticle pore space in physically reconstructed packed beds. J Chromatogr A 2018; 1581-1582:173-179. [DOI: 10.1016/j.chroma.2018.11.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/16/2018] [Accepted: 11/01/2018] [Indexed: 10/27/2022]
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12
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Schure MR, Maier RS. Ellipsoidal particles for liquid chromatography: Fluid mechanics, efficiency and wall effects. J Chromatogr A 2018; 1580:30-48. [DOI: 10.1016/j.chroma.2018.09.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/16/2018] [Accepted: 09/24/2018] [Indexed: 10/28/2022]
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13
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Reich SJ, Svidrytski A, Hlushkou D, Stoeckel D, Kübel C, Höltzel A, Tallarek U. Hindrance Factor Expression for Diffusion in Random Mesoporous Adsorbents Obtained from Pore-Scale Simulations in Physical Reconstructions. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04840] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Stefan-Johannes Reich
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Artur Svidrytski
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Dzmitry Hlushkou
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Daniela Stoeckel
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
- Institute of Physical Chemistry, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 58, 35392 Gießen, Germany
| | - Christian Kübel
- Institute
of Nanotechnology and Karlsruhe Nano Micro Facility, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Alexandra Höltzel
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
| | - Ulrich Tallarek
- Department
of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35032 Marburg, Germany
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14
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Tourell MC, Pop IA, Brown LJ, Brown RCD, Pileio G. Singlet-assisted diffusion-NMR (SAD-NMR): redefining the limits when measuring tortuosity in porous media. Phys Chem Chem Phys 2018; 20:13705-13713. [DOI: 10.1039/c8cp00145f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Long-lived singlet order is exploited in diffusion NMR experiments to successfully measure the tortuosity of randomly packed spheres with diameters ranging from 500 to 1000 μm.
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15
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Experimental evidence of the kinetic performance achievable with columns packed with new 1.9μm fully porous particles of narrow particle size distribution. J Chromatogr A 2016; 1454:86-92. [DOI: 10.1016/j.chroma.2016.05.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 05/07/2016] [Accepted: 05/10/2016] [Indexed: 11/20/2022]
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16
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Hormann K, Baranau V, Hlushkou D, Höltzel A, Tallarek U. Topological analysis of non-granular, disordered porous media: determination of pore connectivity, pore coordination, and geometric tortuosity in physically reconstructed silica monoliths. NEW J CHEM 2016. [DOI: 10.1039/c5nj02814k] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Different approaches are applied and compared, which are universally applicable to quantify pore coordination, pore and pore-throat connectivity, and geometric tortuosity.
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Affiliation(s)
- Kristof Hormann
- Department of Chemistry
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
| | - Vasili Baranau
- Department of Chemistry
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
| | - Dzmitry Hlushkou
- Department of Chemistry
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
| | - Alexandra Höltzel
- Department of Chemistry
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
| | - Ulrich Tallarek
- Department of Chemistry
- Philipps-Universität Marburg
- D-35032 Marburg
- Germany
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17
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Müllner T, Unger KK, Tallarek U. Characterization of microscopic disorder in reconstructed porous materials and assessment of mass transport-relevant structural descriptors. NEW J CHEM 2016. [DOI: 10.1039/c5nj03346b] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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18
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Karsanina MV, Gerke KM, Skvortsova EB, Mallants D. Universal spatial correlation functions for describing and reconstructing soil microstructure. PLoS One 2015; 10:e0126515. [PMID: 26010779 PMCID: PMC4444105 DOI: 10.1371/journal.pone.0126515] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 04/02/2015] [Indexed: 11/19/2022] Open
Abstract
Structural features of porous materials such as soil define the majority of its physical properties, including water infiltration and redistribution, multi-phase flow (e.g. simultaneous water/air flow, or gas exchange between biologically active soil root zone and atmosphere) and solute transport. To characterize soil microstructure, conventional soil science uses such metrics as pore size and pore-size distributions and thin section-derived morphological indicators. However, these descriptors provide only limited amount of information about the complex arrangement of soil structure and have limited capability to reconstruct structural features or predict physical properties. We introduce three different spatial correlation functions as a comprehensive tool to characterize soil microstructure: 1) two-point probability functions, 2) linear functions, and 3) two-point cluster functions. This novel approach was tested on thin-sections (2.21×2.21 cm2) representing eight soils with different pore space configurations. The two-point probability and linear correlation functions were subsequently used as a part of simulated annealing optimization procedures to reconstruct soil structure. Comparison of original and reconstructed images was based on morphological characteristics, cluster correlation functions, total number of pores and pore-size distribution. Results showed excellent agreement for soils with isolated pores, but relatively poor correspondence for soils exhibiting dual-porosity features (i.e. superposition of pores and micro-cracks). Insufficient information content in the correlation function sets used for reconstruction may have contributed to the observed discrepancies. Improved reconstructions may be obtained by adding cluster and other correlation functions into reconstruction sets. Correlation functions and the associated stochastic reconstruction algorithms introduced here are universally applicable in soil science, such as for soil classification, pore-scale modelling of soil properties, soil degradation monitoring, and description of spatial dynamics of soil microbial activity.
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Affiliation(s)
- Marina V. Karsanina
- Institute of Geospheres Dynamics of the Russian Academy of Sciences, Moscow, Russia
- AIR Technology, Moscow, Russia
| | - Kirill M. Gerke
- CSIRO Land and Water, Adelaide, South Australia, Australia
- * E-mail:
| | - Elena B. Skvortsova
- Dokuchaev Soil Science Institute of Russian Academy of Sciences, Moscow, Russia
| | - Dirk Mallants
- CSIRO Land and Water, Adelaide, South Australia, Australia
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19
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Agrawal A, Choudhury S, Archer LA. A highly conductive, non-flammable polymer–nanoparticle hybrid electrolyte. RSC Adv 2015. [DOI: 10.1039/c5ra01031d] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bi-dispersed hybrid nanoparticle electrolytes exhibit high ionic conductivity and reduced activation energy, enabling electrolytes with high particle loading.
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Affiliation(s)
- Akanksha Agrawal
- School of Chemical and Biomolecular Engineering
- Cornell University
- Ithaca
- USA
| | | | - Lynden A. Archer
- School of Chemical and Biomolecular Engineering
- Cornell University
- Ithaca
- USA
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20
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Baranau V, Tallarek U. On the jamming phase diagram for frictionless hard-sphere packings. SOFT MATTER 2014; 10:7838-7848. [PMID: 25155116 DOI: 10.1039/c4sm01439a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We computer-generated monodisperse and polydisperse frictionless hard-sphere packings of 10(4) particles with log-normal particle diameter distributions in a wide range of packing densities φ (for monodisperse packings φ = 0.46-0.72). We equilibrated these packings and searched for their inherent structures, which for hard spheres we refer to as closest jammed configurations. We found that the closest jamming densities φ(J) for equilibrated packings with initial densities φ ≤ 0.52 are located near the random close packing limit φ(RCP); the available phase space is dominated by basins of attraction that we associate with liquid. φ(RCP) depends on the polydispersity and is ∼ 0.64 for monodisperse packings. For φ > 0.52, φ(J) increases with φ; the available phase space is dominated by basins of attraction that we associate with glass. When φ reaches the ideal glass transition density φ(g), φ(J) reaches the ideal glass density (the glass close packing limit) φ(GCP), so that the available phase space is dominated at φ(g) by the basin of attraction of the ideal glass. For packings with sphere diameter standard deviation σ = 0.1, φ(GCP) ≈ 0.655 and φ(g) ≈ 0.59. For monodisperse and slightly polydisperse packings, crystallization is superimposed on these processes: it starts at the melting transition density φ(m) and ends at the crystallization offset density φ(off). For monodisperse packings, φ(m) ≈ 0.54 and φ(off) ≈ 0.61. We verified that the results for polydisperse packings are independent of the generation protocol for φ ≤ φ(g).
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Affiliation(s)
- Vasili Baranau
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg, Germany.
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21
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Gritti F, Bell DS, Guiochon G. Particle size distribution and column efficiency. An ongoing debate revived with 1.9μm Titan-C18 particles. J Chromatogr A 2014; 1355:179-92. [DOI: 10.1016/j.chroma.2014.06.029] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 06/06/2014] [Accepted: 06/10/2014] [Indexed: 10/25/2022]
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22
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Scheven UM, Khirevich S, Daneyko A, Tallarek U. Longitudinal and transverse dispersion in flow through random packings of spheres: a quantitative comparison of experiments, simulations, and models. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:053023. [PMID: 25353896 DOI: 10.1103/physreve.89.053023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Indexed: 06/04/2023]
Abstract
Pulsed field gradient nuclear magnetic resonance was used to determine the intrinsic longitudinal and transverse dispersivity of random packings of nearly monodisperse spheres in experiments covering 3.5 orders of magnitude in reduced velocity Pe, from the diffusion dominated regime Pe < 1 to the high velocity regime Pe > 1000. Additionally, using lattice-Boltzmann simulations with tracer tracking, the dispersivities of random packings were determined numerically. Experimental and simulation results are shown to agree to within a few percent over the full velocity range. The velocity dependence of transverse and longitudinal dispersion in packed spheres is described by heuristic models with three parameters each. The simulations were extended to regimes not accessible to experiments, dispersing tracers in flows through random "packings" of floating spheres, for comparison with results obtained using jammed packings in which spheres touch. In the regime of fast flows, the jammed packings' longitudinal dispersivities scale with hydrodynamic length. This no longer holds true in the packings with floating spheres, highlighting the role of zones of slow flow or no flow surrounding sphere-sphere contacts.
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Affiliation(s)
- U M Scheven
- REQUIMTE/CQFB, Departamento de Química, FCT-Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
| | - S Khirevich
- Department of Chemistry, Philipps-Universität Marburg Hans-Meerwein-Strasse, 35032 Marburg, Germany
| | - A Daneyko
- Department of Chemistry, Philipps-Universität Marburg Hans-Meerwein-Strasse, 35032 Marburg, Germany
| | - U Tallarek
- Department of Chemistry, Philipps-Universität Marburg Hans-Meerwein-Strasse, 35032 Marburg, Germany
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23
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Bouchet R, Phan TNT, Beaudoin E, Devaux D, Davidson P, Bertin D, Denoyel R. Charge Transport in Nanostructured PS–PEO–PS Triblock Copolymer Electrolytes. Macromolecules 2014. [DOI: 10.1021/ma500420w] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Bouchet
- Laboratoire
d’Electrochimie et de Physico-chimie des Matériaux et
des Interfaces (LEPMI) UMR CNRS 5279, Grenoble Universités, 1130
rue de la piscine, 38402 St. Martin d’Hères, France
| | - T. N. T. Phan
- Institut
de Chimie Radicalaire - UMR 7273, Chimie Radicalaire Organique et
Polymères de Spécialité, Aix-Marseille Université, Campus Saint Jérôme, Case 542, 13397 Marseille, Cedex 20, France
| | - E. Beaudoin
- Institut
de Chimie Radicalaire - UMR 7273, Chimie Radicalaire Organique et
Polymères de Spécialité, Aix-Marseille Université, Campus Saint Jérôme, Case 542, 13397 Marseille, Cedex 20, France
- Laboratoire
de Physique des Solides, UMR 8502 CNRS, Université Paris-Sud, Bâtiment 510, 91405 Orsay, Cedex, France
| | - D. Devaux
- Institut
de Chimie Radicalaire - UMR 7273, Chimie Radicalaire Organique et
Polymères de Spécialité, Aix-Marseille Université, Campus Saint Jérôme, Case 542, 13397 Marseille, Cedex 20, France
- MADIREL
- UMR 7246, Matériaux divisés, interfaces, réactivité,
électrochimie, Aix-Marseille Université, Campus saint Jérôme,
Bât. MADIREL, 13397 Marseille, Cedex 20, France
| | - P. Davidson
- Laboratoire
de Physique des Solides, UMR 8502 CNRS, Université Paris-Sud, Bâtiment 510, 91405 Orsay, Cedex, France
| | - D. Bertin
- Institut
de Chimie Radicalaire - UMR 7273, Chimie Radicalaire Organique et
Polymères de Spécialité, Aix-Marseille Université, Campus Saint Jérôme, Case 542, 13397 Marseille, Cedex 20, France
| | - R. Denoyel
- MADIREL
- UMR 7246, Matériaux divisés, interfaces, réactivité,
électrochimie, Aix-Marseille Université, Campus saint Jérôme,
Bât. MADIREL, 13397 Marseille, Cedex 20, France
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24
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Boccardo G, Marchisio DL, Sethi R. Microscale simulation of particle deposition in porous media. J Colloid Interface Sci 2014; 417:227-37. [DOI: 10.1016/j.jcis.2013.11.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 10/23/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Gianluca Boccardo
- DISAT - Dipartimento Scienza Applicata e Tecnologia, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
| | - Daniele L Marchisio
- DISAT - Dipartimento Scienza Applicata e Tecnologia, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy.
| | - Rajandrea Sethi
- DIATI - Dipartimento di Ingegneria dell'Ambiente, del Territorio e delle Infrastrutture, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
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Wernert V, Bouchet R, Denoyel R. Impact of the solute exclusion on the bed longitudinal diffusion coefficient and particle intra-tortuosity determined by ISEC. J Chromatogr A 2014; 1325:179-85. [DOI: 10.1016/j.chroma.2013.12.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 12/05/2013] [Accepted: 12/06/2013] [Indexed: 10/25/2022]
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26
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Comparison of first and second generation analytical silica monoliths by pore-scale simulations of eddy dispersion in the bulk region. J Chromatogr A 2013; 1303:28-38. [DOI: 10.1016/j.chroma.2013.06.039] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 06/12/2013] [Accepted: 06/14/2013] [Indexed: 11/24/2022]
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27
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Gritti F, Guiochon G. Perspectives on the Evolution of the Column Efficiency in Liquid Chromatography. Anal Chem 2013; 85:3017-35. [DOI: 10.1021/ac3033307] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fabrice Gritti
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
| | - Georges Guiochon
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600, United States
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28
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Chester TL. Recent Developments in High-Performance Liquid Chromatography Stationary Phases. Anal Chem 2012; 85:579-89. [DOI: 10.1021/ac303180y] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Thomas L. Chester
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati,
Ohio 45221-0172, United States
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29
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Gritti F, Guiochon G. Theoretical and experimental impact of the bed aspect ratio on the axial dispersion coefficient of columns packed with 2.5μm particles. J Chromatogr A 2012; 1262:107-21. [DOI: 10.1016/j.chroma.2012.09.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 08/31/2012] [Accepted: 09/03/2012] [Indexed: 11/30/2022]
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30
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Khirevich S, Höltzel A, Seidel-Morgenstern A, Tallarek U. Geometrical and topological measures for hydrodynamic dispersion in confined sphere packings at low column-to-particle diameter ratios. J Chromatogr A 2012; 1262:77-91. [PMID: 23000179 DOI: 10.1016/j.chroma.2012.08.086] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Revised: 08/28/2012] [Accepted: 08/29/2012] [Indexed: 10/27/2022]
Abstract
At low column-to-particle diameter (or aspect) ratio (d(c)/d(p)) the kinetic column performance is dominated by the transcolumn disorder that arises from the morphological gradient between the more homogeneous, looser packed wall region and the random, dense core. For a systematic analysis of this morphology-dispersion relation we computer-generated a set of confined sphere packings varying three parameters: aspect ratio (d(c)/d(p)=10-30), bed porosity (ɛ=0.40-0.46), and packing homogeneity. Plate height curves were received from simulation of hydrodynamic dispersion in the packings over a wide range of reduced velocities (v=0.5-500). Geometrical measures derived from radial porosity and velocity profiles were insufficient as morphological descriptors of the plate height data. After Voronoi tessellation of the packings, topological information was obtained from the statistical moments of the free Voronoi volume (V(free)) distributions. The radial profile of the standard deviation of the V(free) distributions in the form of an integral measure was identified as a quantitative scalar measure for the transcolumn disorder. The first morphology-dispersion correlation for confined sphere packings deepens our understanding of how the packing microstructure determines the kinetic column performance.
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Affiliation(s)
- Siarhei Khirevich
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35032 Marburg, Germany
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31
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Daneyko A, Hlushkou D, Khirevich S, Tallarek U. From random sphere packings to regular pillar arrays: Analysis of transverse dispersion. J Chromatogr A 2012; 1257:98-115. [DOI: 10.1016/j.chroma.2012.08.024] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 08/02/2012] [Accepted: 08/05/2012] [Indexed: 11/26/2022]
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32
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Koku H, Maier RS, Schure MR, Lenhoff AM. Modeling of dispersion in a polymeric chromatographic monolith. J Chromatogr A 2012; 1237:55-63. [PMID: 22465685 PMCID: PMC3327764 DOI: 10.1016/j.chroma.2012.03.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2011] [Revised: 02/24/2012] [Accepted: 03/01/2012] [Indexed: 11/26/2022]
Abstract
Dispersion in a commercial polymeric monolith was simulated on a sample geometry obtained by direct imaging using high-resolution electron microscopy. A parallelized random walk algorithm, implemented using a velocity field obtained previously by the lattice-Boltzmann method, was used to model mass transfer. Both point particles and probes of finite size were studied. Dispersion simulations with point particles using periodic boundaries resulted in plate heights that varied almost linearly with flow rate, at odds with the weaker dependence suggested by experimental observations and predicted by theory. This discrepancy resulted from the combined effect of the artificial symmetry in the velocity field and the periodic boundaries implemented to emulate macroscopic column lengths. Eliminating periodicity and simulating a single block length instead resulted in a functional dependence of plate heights on flow rate more in accord with experimental trends and theoretical predictions for random media. The lower values of the simulated plate heights than experimental ones are attributed in part to the presence of walls in real systems, an effect not modeled by the algorithm. On the other hand, analysis of transient dispersion coefficients and comparison of lateral particle positions at the entry and exit hinted at non-asymptotic behavior and a strong degree of correlation that was presumably a consequence of preferential high-velocity pathways in the raw sample block. Simulations with finite-sized probes resulted in particle trajectories that frequently terminated at narrow constrictions of the geometry. The amount of entrapment was predicted to increase monotonically with flow rate, evidently due to the relative contributions to transport by convection that carries particles to choke-points and diffusion that dislodges these entrapped particles. The overall effect is very similar to a flow-dependent entrapment phenomenon previously observed experimentally for adenovirus.
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Affiliation(s)
- Harun Koku
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
| | - Robert S. Maier
- Information Technology Laboratory, U.S. Army Engineer Research and Development Center, Vicksburg, MS 39180, USA
| | - Mark R. Schure
- Theoretical Separation Science Laboratory, The Dow Chemical Company, 727 Norristown Road, Spring House, PA 19477, USA
| | - Abraham M. Lenhoff
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA
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33
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Bruns S, Grinias JP, Blue LE, Jorgenson JW, Tallarek U. Morphology and Separation Efficiency of Low-Aspect-Ratio Capillary Ultrahigh Pressure Liquid Chromatography Columns. Anal Chem 2012; 84:4496-503. [DOI: 10.1021/ac300326k] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefan Bruns
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse,
35032 Marburg, Germany
| | - James P. Grinias
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599-3290, United States
| | - Laura E. Blue
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599-3290, United States
| | - James W. Jorgenson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599-3290, United States
| | - Ulrich Tallarek
- Department of Chemistry, Philipps-Universität Marburg, Hans-Meerwein-Strasse,
35032 Marburg, Germany
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34
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Daneyko A, Khirevich S, Höltzel A, Seidel-Morgenstern A, Tallarek U. From random sphere packings to regular pillar arrays: Effect of the macroscopic confinement on hydrodynamic dispersion. J Chromatogr A 2011; 1218:8231-48. [DOI: 10.1016/j.chroma.2011.09.039] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 09/06/2011] [Accepted: 09/13/2011] [Indexed: 11/16/2022]
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