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Effect of friction on dense suspension flows of hard particles

Trulsson, M. LU ; DeGiuli, E. and Wyart, M. (2017) In Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 95(1).
Abstract

We use numerical simulations to study the effect of particle friction on suspension flows of non-Brownian hard particles. By systematically varying the microscopic friction coefficient μp and the viscous number J, we build a phase diagram that identifies three regimes of flow: frictionless, frictional sliding, and rolling. Using energy balance in flow, we predict relations between kinetic observables, confirmed by numerical simulations. For realistic friction coefficients and small viscous numbers (below J∼10-3), we show that the dominating dissipative mechanism is sliding of frictional contacts, and we characterize asymptotic behaviors as jamming is approached. Outside this regime, our observations support the idea that flow belongs to... (More)

We use numerical simulations to study the effect of particle friction on suspension flows of non-Brownian hard particles. By systematically varying the microscopic friction coefficient μp and the viscous number J, we build a phase diagram that identifies three regimes of flow: frictionless, frictional sliding, and rolling. Using energy balance in flow, we predict relations between kinetic observables, confirmed by numerical simulations. For realistic friction coefficients and small viscous numbers (below J∼10-3), we show that the dominating dissipative mechanism is sliding of frictional contacts, and we characterize asymptotic behaviors as jamming is approached. Outside this regime, our observations support the idea that flow belongs to the universality class of frictionless particles. We discuss recent experiments in the context of our phase diagram.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
volume
95
issue
1
publisher
American Physical Society
external identifiers
  • scopus:85010447601
  • wos:000391864200009
ISSN
1539-3755
DOI
10.1103/PhysRevE.95.012605
language
English
LU publication?
yes
id
b6259be9-b03f-44e8-b4bc-598fe4c9a1b9
date added to LUP
2017-03-02 10:25:21
date last changed
2018-01-07 11:53:29
@article{b6259be9-b03f-44e8-b4bc-598fe4c9a1b9,
  abstract     = {<p>We use numerical simulations to study the effect of particle friction on suspension flows of non-Brownian hard particles. By systematically varying the microscopic friction coefficient μp and the viscous number J, we build a phase diagram that identifies three regimes of flow: frictionless, frictional sliding, and rolling. Using energy balance in flow, we predict relations between kinetic observables, confirmed by numerical simulations. For realistic friction coefficients and small viscous numbers (below J∼10-3), we show that the dominating dissipative mechanism is sliding of frictional contacts, and we characterize asymptotic behaviors as jamming is approached. Outside this regime, our observations support the idea that flow belongs to the universality class of frictionless particles. We discuss recent experiments in the context of our phase diagram.</p>},
  articleno    = {012605},
  author       = {Trulsson, M. and DeGiuli, E. and Wyart, M.},
  issn         = {1539-3755},
  language     = {eng},
  month        = {01},
  number       = {1},
  publisher    = {American Physical Society},
  series       = {Physical Review E - Statistical, Nonlinear, and Soft Matter Physics},
  title        = {Effect of friction on dense suspension flows of hard particles},
  url          = {http://dx.doi.org/10.1103/PhysRevE.95.012605},
  volume       = {95},
  year         = {2017},
}