Onset and evolution of a wavy instability in shaken sand

被引:11
作者
vanDoorn, E [1 ]
Behringer, RP [1 ]
机构
[1] DUKE UNIV,CTR NONLINEAR & COMPLEX SYST,DURHAM,NC 27708
基金
美国国家航空航天局; 美国国家科学基金会;
关键词
D O I
10.1016/S0375-9601(97)00684-1
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A novel small wavelength instability occurs in experiments for vertically shaken (z = acos(omega t)) sand, for small particle diameters d and when gas effects are important. At onset, the energy (a omega)(2)/gd is proportional to a/d, as previously found for traveling waves. The instability begins as a surface perturbation with wavelength lambda(0) similar to 6 mm; subsequently lambda grows exponentially in time. (C) 1997 Published by Elsevier Science B.V.
引用
收藏
页码:469 / 474
页数:6
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