Power-Law Scaling in Granular Rheology across Flow Geometries
Name
PhysRevLett.125.088002.pdf
Description
Published version
Size
1.79 MB
Format
Unknown
Checksum (MD5)
7a92657d5dfc1ac756b1c9f424774aa2
Author(s)
Kim, Seongmin
Kamrin, Kenneth N
Date Issued
2020
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Kim, Seongmin and Kamrin, Ken. 2020. "Power-Law Scaling in Granular Rheology across Flow Geometries." Physical Review Letters, 125 (8).
Version
Final published version
Abstract
© 2020 American Physical Society. Based on discrete element method simulations, we propose a new form of the constitutive equation for granular flows independent of packing fraction. Rescaling the stress ratio μ by a power of dimensionless temperature Θ makes the data from a wide set of flow geometries collapse to a master curve depending only on the inertial number I. The basic power-law structure appears robust to varying particle properties (e.g., surface friction) in both 2D and 3D systems. We show how this rheology fits and extends frameworks such as kinetic theory and the nonlocal granular fluidity model.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.125.088002
