Dense Granular Flow around a Penetrating Object: Experiment and Hydrodynamic Model

被引：65

作者：

Seguin, A. ^{[1
]}

Bertho, Y. ^{[1
]}

Gondret, P. ^{[1
]}

Crassous, J. ^{[2
]}

机构：

[1] Univ Paris 06, Univ Paris Sud, CNRS, Lab FAST, F-91405 Orsay, France

[2] Univ Rennes 1, CNRS, UMR 6251, Inst Phys Rennes, F-35042 Rennes, France

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 04期

关键词：

DRAG; LAW; IMPACT;

D O I：

10.1103/PhysRevLett.107.048001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present in this Letter experimental results on the bidimensional flow field around a cylinder penetrating into dense granular matter, together with drag force measurements. A hydrodynamic model based on extended kinetic theory for dense granular flow reproduces well the flow localization close to the cylinder and the corresponding scalings of the drag force, which is found to not depend on velocity, but linearly on the pressure and on the cylinder diameter and weakly on the grain size. Such a regime is found to be valid at a low enough "granular" Reynolds number.

引用

页数：4

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