Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling
Name
PhysRevLett.118.058001.pdf
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572.68 KB
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Author(s)
Zhang, Qiong
Kamrin, Ken
Kamrin, Kenneth N
Date Issued
January 2017
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Zhang, Qiong, and Ken Kamrin. “Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling.” Physical Review Letters 118, 5 (January 2017): 058001 © 2017 American Physical Society
Version
Final published version
Abstract
A recent granular rheology based on an implicit "granular fluidity" field has been shown to quantitatively predict many nonlocal phenomena. However, the physical nature of the field has not been identified. Here, the granular fluidity is found to be a kinematic variable given by the velocity fluctuation and packing fraction. This is verified with many discrete element simulations, which show that the operational fluidity definition, solutions of the fluidity model, and the proposed microscopic formula all agree. Kinetic theoretical and Eyring-like explanations shed insight into the obtained form.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.118.058001
