Drag Law of Two Dimensional Granular Fluids
Soft Condensed Matter
2016-01-19 v2
Abstract
The drag force law acting on a moving circular disk in a two-dimensional granular medium is analyzed based on the discrete element method (DEM). It is remarkable that the drag force on the moving disk in moderate dense and pure two-dimensional granular medium can be well reproduced by a perfect fluid with separation from the surface of the tracer. A yield force, being independent of the moving speed of the disk, appears if a dry friction between the granular disks and the bottom plate exists. The perfect fluidity is violated in this case. The yield force and the drag force diverge at the jamming point.
Keywords
Cite
@article{arxiv.1504.04805,
title = {Drag Law of Two Dimensional Granular Fluids},
author = {Satoshi Takada and Hisao Hayakawa},
journal= {arXiv preprint arXiv:1504.04805},
year = {2016}
}
Comments
13 pages, 6 figures (to be published in J. Eng. Mech.)