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Samsuzzaman M, Sayeed A, Saha A. Reentrant melting of lanes of rough circular disks. Phys Rev E 2022; 105:024608. [PMID: 35291112 DOI: 10.1103/physreve.105.024608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 02/04/2022] [Indexed: 06/14/2023]
Abstract
We consider binary suspension of rough, circular particles in two dimensions under athermal conditions. The suspension is subject to a time-independent external drive in response to which half of the particles are pulled along the field direction, whereas the other half is pushed in the opposite direction. Simulating the system with different magnitude of external drive in steady state, we obtain oppositely moving macroscopic lanes only for a moderate range of external drive. Below as well as above the range we obtain states with no lane. Hence we find that the no-lane state reenters along the axis of the external drive in the nonequilibrium phase diagram corresponding to the laning transition, with varying roughness of individual particles and external drive. Interparticle friction (contact dissipation) due to the roughness of the individual particle is the main player behind the reentrance of the no-lane state at high external drives.
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Affiliation(s)
- Md Samsuzzaman
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - Ahmed Sayeed
- Department of Physics, Savitribai Phule Pune University, Pune 411007, India
| | - Arnab Saha
- Department of Physics, University Of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata-700009, India
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2
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Hayakawa H. Simulation of dense non-Brownian suspensions with the lattice Boltzmann method: shear jammed and fragile states. SOFT MATTER 2020; 16:945-959. [PMID: 31845696 DOI: 10.1039/c9sm00850k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Dense non-Brownian suspensions, including both hydrodynamic interactions and frictional contacts between particles, are numerically studied under simple and oscillatory shears in terms of the lattice Boltzmann method. We successfully reproduce the discontinuous shear thickening (DST) under a simple shear for bulk three-dimensional systems. For our simulation of an oscillatory shear in a quasi-two-dimensional system, we measure the mechanical response after the reduction of the strain amplitude from the initial oscillations. Here, we find the existence of a shear-jammed state under this protocol in which the storage modulus G' is only finite for high initial strain amplitude γI0. We also find the existence of a fragile state in which both fluid-like and solid-like responses can be detected for an identical area fraction and an initial strain amplitude γI0 depending on the initial phase Θ (or the asymmetricity of the applied strain) of the oscillatory shear. We also observe a DST-like behavior under the oscillatory shear in the fragile state. Moreover, we find that the stress anisotropy becomes large in the fragile state. Finally, we confirm that a stress formula based on the angular distribution of the contact force recovers the contact contributions to the stress tensors for both simple and oscillatory shears with large strains.
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Affiliation(s)
- Hisao Hayakawa
- Yukawa Institute for Theoretical Physics, Kyoto University, Kitashirakawaoiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan.
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3
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Edens LE, Pednekar S, Morris JF, Schenter GK, Clark AE, Chun J. Global topology of contact force networks: Insight into shear thickening suspensions. Phys Rev E 2019; 99:012607. [PMID: 30780354 DOI: 10.1103/physreve.99.012607] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Indexed: 11/07/2022]
Abstract
Highly concentrated particle suspensions (also called slurries) can undergo a sharp increase in viscosity, or shear thickening, under applied stress. Understanding the fundamental features leading to such rheological change is crucial to optimize flow conditions or to design flow modifiers for slurry processing. While local changes to the particle environment under applied shear can be related to changes in viscosity, there is a broader need to connect the shear thickening transition to the fundamental organization of particle-interaction forces which lead to long-range organization. In particular, at a high volume fraction of particles, recent evidence indicates frictional forces between contacting particles is of importance. Herein, the network of frictional contact forces is analyzed within simulated two-dimensional shear thickening suspensions. Two topological metrics are studied to characterize the response of the contact force network (CFN) under varying applied shear stress. The metrics, geodesic index and the void parameter, reflect complementary aspects of the CFN: One is the connectedness of the contact network and the second is the distribution of spatial areas devoid of particle-particle contacts. Considered in relation to the variation of the viscosity, the topological metrics show that the network grows homogeneously at large scales but with many local regions devoid of contacts, indicating clearly the role of CFN growth in causing the large change in the rheological response at the shear thickening transition.
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Affiliation(s)
- Lance E Edens
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
| | - Sidhant Pednekar
- Benjamin Levich Institute and Department of Chemical Engineering, The City College of New York, New York, New York 10031, USA
| | - Jeffrey F Morris
- Benjamin Levich Institute and Department of Chemical Engineering, The City College of New York, New York, New York 10031, USA
| | - Gregory K Schenter
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA and Department of Chemistry, Washington State University, Pullman, Washington 99164, USA
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, USA; Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, USA; and Pacific Northwest National Laboratory, Richland, Washington 99352, USA
| | - Jaehun Chun
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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4
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Chu B, Salem DR. Impact-induced solidlike behavior and elasticity in concentrated colloidal suspensions. Phys Rev E 2018; 96:042601. [PMID: 29347503 DOI: 10.1103/physreve.96.042601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 11/07/2022]
Abstract
Modified drop weight impact tests were performed on SiO_{2}-ethylene glycol concentrated suspensions. Counterintuitive impact-induced solidlike behavior and elasticity, causing significant deceleration and rebound of the impactor, were observed. We provide evidence that the observed large deceleration force on the impactor mainly originates from the hydrodynamic force, and that the elasticity arises from the short-range repulsive force of a solvation layer on the particle surface. This study presents key experimental results to help understand the mechanisms underlying various stress-induced solidification phenomena.
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Affiliation(s)
- Baojin Chu
- Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei 230026, Anhui Province, China
| | - David R Salem
- Composites and Polymer Engineering (CAPE) Laboratory, South Dakota School of Mines and Technology, Rapid City, South Dakota 57701, USA
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Pan Z, de Cagny H, Weber B, Bonn D. S-shaped flow curves of shear thickening suspensions: direct observation of frictional rheology. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2015; 92:032202. [PMID: 26465464 DOI: 10.1103/physreve.92.032202] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2014] [Indexed: 06/05/2023]
Abstract
We study the rheological behavior of concentrated granular suspensions of simple spherical particles. Under controlled stress, the system exhibits an S-shaped flow curve (stress vs shear rate) with a negative slope in between the low-viscosity Newtonian regime and the shear thickened regime. Under controlled shear rate, a discontinuous transition between the two states is observed. Stress visualization experiments with a fluorescent probe suggest that friction is at the origin of shear thickening. Stress visualization shows that the stress in the system remains homogeneous (no shear banding) if a stress is imposed that is intermediate between the high- and low-stress branches. The S-shaped shear thickening is then due to the discontinuous formation of a frictional force network between particles upon increasing the stress.
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Affiliation(s)
- Zhongcheng Pan
- Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands
| | - Henri de Cagny
- Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands
| | - Bart Weber
- Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands
| | - Daniel Bonn
- Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands
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Ortiz CP, Daniels KE, Riehn R. Nonlinear elasticity of microsphere heaps. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 90:022304. [PMID: 25215735 DOI: 10.1103/physreve.90.022304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Indexed: 06/03/2023]
Abstract
Thermal fluctuations, geometric exclusion, and external driving all govern the mechanical response of dense particulate suspensions. Here, we measure the stress-strain response of quasi-two-dimensional flow-stabilized microsphere heaps in a regime in which all three effects are present using a microfluidic device. We observe that the elastic modulus and the mean interparticle separation of the heaps are tunable via the confining stress provided by the fluid flow. Furthermore, the measured stress-strain curves exhibit a universal nonlinear shape, which can be predicted from a thermal van der Waals equation of state with excluded volume. This analysis indicates that many-body interactions contribute a significant fraction of the stress supported by the heap.
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Affiliation(s)
- Carlos P Ortiz
- Department of Physics, North Carolina State University, Raleigh, North Carolina, USA
| | - Karen E Daniels
- Department of Physics, North Carolina State University, Raleigh, North Carolina, USA
| | - Robert Riehn
- Department of Physics, North Carolina State University, Raleigh, North Carolina, USA
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Brown E, Jaeger HM. Shear thickening in concentrated suspensions: phenomenology, mechanisms and relations to jamming. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2014; 77:046602. [PMID: 24695058 DOI: 10.1088/0034-4885/77/4/046602] [Citation(s) in RCA: 181] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Shear thickening is a type of non-Newtonian behavior in which the stress required to shear a fluid increases faster than linearly with shear rate. Many concentrated suspensions of particles exhibit an especially dramatic version, known as Discontinuous Shear Thickening (DST), in which the stress suddenly jumps with increasing shear rate and produces solid-like behavior. The best known example of such counter-intuitive response to applied stresses occurs in mixtures of cornstarch in water. Over the last several years, this shear-induced solid-like behavior together with a variety of other unusual fluid phenomena has generated considerable interest in the physics of densely packed suspensions. In this review, we discuss the common physical properties of systems exhibiting shear thickening, and different mechanisms and models proposed to describe it. We then suggest how these mechanisms may be related and generalized, and propose a general phase diagram for shear thickening systems. We also discuss how recent work has related the physics of shear thickening to that of granular materials and jammed systems. Since DST is described by models that require only simple generic interactions between particles, we outline the broader context of other concentrated many-particle systems such as foams and emulsions, and explain why DST is restricted to the parameter regime of hard-particle suspensions. Finally, we discuss some of the outstanding problems and emerging opportunities.
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Roché M, Myftiu E, Johnston MC, Kim P, Stone HA. Dynamic fracture of nonglassy suspensions. PHYSICAL REVIEW LETTERS 2013; 110:148304. [PMID: 25167046 DOI: 10.1103/physrevlett.110.148304] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Indexed: 06/03/2023]
Abstract
We study the dynamic fracture of thin layers of suspensions of non-Brownian rigid particles. The impact of a projectile triggers a liquid-to-solid transition and a hole opens in the layer. We show that the occurrence of fracture and the spatial and dynamic features of the cracks depend mostly on the thickness of the layer and the particle volume fraction. In contrast, the properties of the fractured material seem independent of volume fraction. Finally, we measure the velocity of the crack tip, from which we estimate an effective value of the shear modulus of the fractured material.
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Affiliation(s)
- Matthieu Roché
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Eglind Myftiu
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Mitchell C Johnston
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - Pilnam Kim
- Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Republic of Korea
| | - Howard A Stone
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA
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Jiang T, Zukoski CF. Role of Particle Size and Polymer Length in Rheology of Colloid–Polymer Composites. Macromolecules 2012. [DOI: 10.1021/ma301184t] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Tianying Jiang
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana,
Illinois 61801, United States
| | - Charles F. Zukoski
- Department of Chemical and Biomolecular Engineering, University of Illinois Urbana−Champaign, Urbana,
Illinois 61801, United States
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Hess A, Pretzl M, Heymann L, Fery A, Aksel N. Systematic modification of the rheological properties of colloidal suspensions with polyelectrolyte multilayers. Phys Rev E 2011; 84:031407. [PMID: 22060371 DOI: 10.1103/physreve.84.031407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 05/05/2011] [Indexed: 11/07/2022]
Abstract
Tailoring rheological properties of colloidal suspensions with the adsorption of polyelectrolyte multilayers (PEMs) is based on the idea of controlling macroscopic mechanical properties by modifying the particle surface in a reproducible and well-understood manner. With layer-by-layer self-assembly, monodisperse polystyrene particles are coated with up to ten layers of the oppositely charged strong polyelectrolytes: poly(diallyl dimethyl ammonium chloride) and poly(styrene sulfonate). The conformation of the adsorbed polyelectrolyte is controlled by the ionic strength of the used aqueous polyelectrolyte solution. For 1M NaCl solution, a brushlike adsorption of the polyelectrolyte is expected. The ability of PEMs to serve on a nanoscale level as surface modifiers and influence macroscopic rheological properties like viscoelasticity, yield stress, and shear banding is discussed. The mechanical behavior of these suspensions is qualitatively described by the theory of Derjaguin-Landau-Verwey-Overbeek with short-range repulsion and long-range attraction. A scaling rule is proposed which distinguishes between the precusor and the multilayer regime.
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Affiliation(s)
- Andreas Hess
- Department of Applied Mechanics and Fluid Dynamics, University of Bayreuth, D-95440 Bayreuth, Germany
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Smith M, Besseling R, Cates M, Bertola V. Dilatancy in the flow and fracture of stretched colloidal suspensions. Nat Commun 2010; 1:114. [DOI: 10.1038/ncomms1119] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 10/19/2010] [Indexed: 11/10/2022] Open
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