Dynamical flow arrest in confined gravity driven flows of soft jammed particles

Using numerical simulations, we study the gravity driven flow of jammed soft disks in confined channels. We demonstrate that confinement results in increasing the yield threshold for the Poiseuille flow, in contrast to the planar Couette flow. By solving a nonlocal flow model for such systems, we sh...

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Published inPhysical review letters Vol. 109; no. 3; p. 036001
Main Authors Chaudhuri, Pinaki, Mansard, Vincent, Colin, Annie, Bocquet, Lyderic
Format Journal Article
LanguageEnglish
Published United States 20.07.2012
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Abstract Using numerical simulations, we study the gravity driven flow of jammed soft disks in confined channels. We demonstrate that confinement results in increasing the yield threshold for the Poiseuille flow, in contrast to the planar Couette flow. By solving a nonlocal flow model for such systems, we show that this effect is due to the correlated dynamics responsible for flow, coupled with the stress heterogeneity imposed for the Poiseuille flow. We also observe that with increasing confinement, the cooperative nature of the flow results in increasing intermittent behavior. Our studies indicate that such features are generic properties of a wide variety of jammed materials.
AbstractList Using numerical simulations, we study the gravity driven flow of jammed soft disks in confined channels. We demonstrate that confinement results in increasing the yield threshold for the Poiseuille flow, in contrast to the planar Couette flow. By solving a nonlocal flow model for such systems, we show that this effect is due to the correlated dynamics responsible for flow, coupled with the stress heterogeneity imposed for the Poiseuille flow. We also observe that with increasing confinement, the cooperative nature of the flow results in increasing intermittent behavior. Our studies indicate that such features are generic properties of a wide variety of jammed materials.
Author Mansard, Vincent
Bocquet, Lyderic
Chaudhuri, Pinaki
Colin, Annie
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  givenname: Lyderic
  surname: Bocquet
  fullname: Bocquet, Lyderic
BackLink https://www.ncbi.nlm.nih.gov/pubmed/22861872$$D View this record in MEDLINE/PubMed
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