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Gou D, Fan W, Zhou B, An X, Yang R, Dong K, Zou R, Fu H, Zhang H, Yang X, Zou Q. CFD-DEM numerical study on air impacted packing densification of equiaxed cylindrical particles. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Rong L, Dong K, Yu A. Lattice-Boltzmann computation of hydraulic pore-to-pore conductance in packed beds of uniform spheres. Chem Eng Sci 2020; 224:115798. [DOI: 10.1016/j.ces.2020.115798] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Song S, Rong L, Dong K, Liu X, Le Clech P, Shen Y. Particle-scale modelling of fluid velocity distribution near the particles surface in sand filtration. Water Res 2020; 177:115758. [PMID: 32278990 DOI: 10.1016/j.watres.2020.115758] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Sand filtration is widely used in drinking water treatment processes, yet the hydraulic fundamentals at particle-scale are not well defined, especially the fluid velocity profile near the sand particles surface. In this study, a numerical model is developed by combining the Lattice Boltzmann (LBM) and the Discrete Element Method (DEM), used to describe the fluid flow over the sand particles surface and the micro-structure details of the sand packed bed respectively. The model is validated by comparing the simulation results with the experimental measurements using two systems, showing that the model can describe the fluid velocity distribution around the particles surface. Critical flow velocity is introduced as the balance between hydrodynamic and adhesive torques acting on sand particle surface. Furthermore, a new concept - effective filter surface (EFS), is defined as the area where the velocity near sand particles surface is less than the critical flow velocity, aiming for indirectly evaluating the performance of sand filtration. It is quantitatively demonstrated that increasing the sand particle size or feed flow velocity results in the decrease of both critical flow velocity and EFS under the given tested conditions. The LBM-DEM model provides a useful tool for understanding the fundamentals of liquid flow distribution and also estimating sand filtration performance under different operation conditions.
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Affiliation(s)
- Shuang Song
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Liangwan Rong
- School of Civil Engineering & Transportation, South China University of Technology, Guangzhou, Guangdong, 510640, China
| | - Kejun Dong
- Centre for Infrastructure Engineering, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Xuefei Liu
- UNSW Centre for Transformational Environmental Technologies, Yixing, Jiangsu, 214200, China
| | - Pierre Le Clech
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Yansong Shen
- School of Chemical Engineering, University of New South Wales, Sydney, NSW, 2052, Australia.
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Qi Z, Kuang S, Qiu T, Yu A. Lattice Boltzmann investigation on fluid flows through packed beds: Interaction between fluid rheology and bed properties. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.05.046] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Patmonoaji A, Tsuji K, Suekane T. Pore-throat characterization of unconsolidated porous media using watershed-segmentation algorithm. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.12.026] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Deshpande R, Antonyuk S, Iliev O. Study of the filter cake formed due to the sedimentation of monodispersed and bidispersed particles using discrete element method-computational fluid dynamics simulations. AIChE J 2019. [DOI: 10.1002/aic.16529] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruturaj Deshpande
- Fraunhofer Institute for Industrial Mathematics ITWM; Kaiserslautern Germany
- Institute of Particle Process Engineering; University of Kaiserslautern; Kaiserslautern Germany
| | - Sergiy Antonyuk
- Institute of Particle Process Engineering; University of Kaiserslautern; Kaiserslautern Germany
| | - Oleg Iliev
- Fraunhofer Institute for Industrial Mathematics ITWM; Kaiserslautern Germany
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Qi Z, Kuang S, Rong L, Yu A. Lattice Boltzmann investigation of the wake effect on the interaction between particle and power-law fluid flow. POWDER TECHNOL 2018; 326:208-21. [DOI: 10.1016/j.powtec.2017.12.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rong L, Dong K, Yu A. A general solution of the drag force in packed beds of multi-sized particles under creeping fluid flow conditions. POWDER TECHNOL 2017. [DOI: 10.1016/j.powtec.2017.03.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kovaleva I, Kovalev O, Smurov I. Model of Heat and Mass Transfer in Random Packing Layer of Powder Particles in Selective Laser Melting. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.phpro.2014.08.143] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mader KS, Schneider P, Müller R, Stampanoni M. A quantitative framework for the 3D characterization of the osteocyte lacunar system. Bone 2013; 57:142-54. [PMID: 23871748 DOI: 10.1016/j.bone.2013.06.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 05/21/2013] [Accepted: 06/21/2013] [Indexed: 01/01/2023]
Abstract
Assessing the role of osteocyte lacunae and the ways in which they communicate with one another is important for determining the function and viability of bone tissue. Osteocytes are able to play a significant role in bone development and remodeling because they can receive nourishment from, interact with, and communicate with other cells. In this sense the immediate environment of an osteocyte is crucial for understanding its function. Modern imaging techniques, ranging from synchrotron radiation-based computed tomography (SR CT) to confocal laser scanning microscopy, produce large volumes of high-quality imaging data of bone tissue on the micrometer scale in rapidly shortening times. These images often contain tens of thousands of osteocytes and their lacunae, void spaces which enclose the osteocytes. While theoretically possible, quantitative analysis of the osteocyte lacunar system is too time consuming to be practical without highly automated tools. Moreover, quantitative morphometry of the osteocyte lacunar system necessitates clearly defined, robust, and three-dimensional (3D) measures. Here, we introduce a framework for the quantitative characterization of millions of osteocyte lacunae and their spatial relationships in 3D. The metrics complement and expand previous works looking at shape and number density while providing novel measures for quantifying spatial distribution and alignment. We developed model, in silico systems to visualize and validate the metrics and provide a concrete example of the attribute being classified with each metric. We then illustrate the applicability to biological samples in a first study comparing two strains of mice and the effect of growth hormone. We found significant differences in shape and distribution between strains for alignment. The proposed quantitative framework can be used in future studies examining differences and treatment effects in bone microstructure at the cell scale. Furthermore, the proposed strategy for quantitative bone cell morphometry will allow investigating structure-function relationships in bone tissue, for example by linking cellular morphometry to bone remodeling.
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Affiliation(s)
- Kevin Scott Mader
- Swiss Light Source, Paul Scherrer Institut, Villigen 5232, Switzerland; Institute for Biomedical Engineering, University of Zurich and ETH Zurich, Zurich 8006, Switzerland.
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Wei Y, Durian DJ. Effect of hydrogel particle additives on water-accessible pore structure of sandy soils: a custom pressure plate apparatus and capillary bundle model. Phys Rev E Stat Nonlin Soft Matter Phys 2013; 87:053013. [PMID: 23767626 DOI: 10.1103/physreve.87.053013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Indexed: 06/02/2023]
Abstract
To probe the effects of hydrogel particle additives on the water-accessible pore structure of sandy soils, we introduce a custom pressure plate method in which the volume of water expelled from a wet granular packing is measured as a function of applied pressure. Using a capillary bundle model, we show that the differential change in retained water per pressure increment is directly related to the cumulative cross-sectional area distribution f(r) of the water-accessible pores with radii less than r. This is validated by measurements of water expelled from a model sandy soil composed of 2-mm-diameter glass beads. In particular, it is found that the expelled water is dramatically dependent on sample height and that analysis using the capillary bundle model gives the same pore size distribution for all samples. The distribution is found to be approximately log normal, and the total cross-sectional area fraction of the accessible pore space is found to be f(0)=0.34. We then report on how the pore distribution and total water-accessible area fraction are affected by superabsorbent hydrogel particle additives, uniformly mixed into a fixed-height sample at varying concentrations. Under both fixed volume and free swelling conditions, the total area fraction of water-accessible pore space in a packing decreases exponentially as the gel concentration increases. The size distribution of the pores is significantly modified by the swollen hydrogel particles, such that large pores are clogged while small pores are formed.
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Affiliation(s)
- Y Wei
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, USA
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Khirevich S, Höltzel A, Daneyko A, Seidel-morgenstern A, Tallarek U. Structure–transport correlation for the diffusive tortuosity of bulk, monodisperse, random sphere packings. J Chromatogr A 2011; 1218:6489-97. [DOI: 10.1016/j.chroma.2011.07.066] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 07/11/2011] [Accepted: 07/12/2011] [Indexed: 11/17/2022]
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Boltachev GS, Volkov NB, Nagayev KA. Effect of retardation in the dispersion forces between spherical particles. J Colloid Interface Sci 2011; 355:417-22. [PMID: 21227447 DOI: 10.1016/j.jcis.2010.12.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2010] [Revised: 12/14/2010] [Accepted: 12/16/2010] [Indexed: 10/18/2022]
Abstract
A model potential for intermolecular attractive forces, which takes into account the retardation effect at large distances, is proposed. This potential is shown to be capable of approximating arbitrary empirical potentials of intermolecular interactions. For this model potential, the generalization of the known Hamaker formula for the attractive energy of macroscopic particles is derived. A comparison of the laws of attraction of particles of spherical shapes, when the retardation effect is taken into account as realized in the model discussed, with the classical Hamaker result neglecting such dependence is carried out.
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Affiliation(s)
- G Sh Boltachev
- Institute of Electrophysics, Ural Branch of Russian Academy of Sciences, Amundsen street 106, Ekaterinburg, Russia.
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