Stop flow of a granular material on a weak slope

被引：1

作者：

Boutreux, T ^{[1
]}

de Gennes, PG ^{[1
]}

机构：

[1] Coll France, F-75231 Paris 05, France

来源：

COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE B-MECANIQUE PHYSIQUE ASTRONOMIE | 1998年 / 326卷 / 04期

关键词：

granular materials; avalanches; surface flows; erosion; sedimentation;

D O I：

10.1016/S1251-8069(98)80035-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

\A ridge of sand, with initial angles +/- theta(i) (smaller than the angle of repose theta(r),) is fed by a source of flux 2Q. We discuss here the theoretical profile achieved after a time t, using the equations of Bouchaud et al. in their original form, and also in a modified form which might apply for strong pou's. The result is a central heap, steeper than the original ridge, of slope close to a,. The horizontal span is predicted to be x(m) = (2Dt)(1/2), with an apparent diffusion coefficient D = Q/( theta(r) -theta(i)). (C) Academie des Sciences/Elsevier Paris.

引用

页码：257 / 262

页数：6