Capillarylike fluctuations at the interface of falling granular jets

被引：26

作者：

Amarouchene, Yacine ^{[1
]}

Boudet, Jean-Francois ^{[1
]}

Kellay, Hamid ^{[1
]}

机构：

[1] Univ Bordeaux 1, Ctr Phys Mol Opt & Hertzienne, CNRS, UMR 5798 & 351,Cours Liberat, F-33405 Talence, France

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.100.218001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the interface fluctuations of a granular jet falling under gravity and show that for small scales they are the analog of the thermally induced capillary waves. Experimental results from radial height and velocity fluctuations, static correlation functions and capillary ripple velocities allow us to estimate a granular surface tension. The ultralow interfacial tensions measured (of the order of 100 mu N= m) can be rationalized using a simple model.

引用

页数：4

共 28 条

[1] Direct visual observation of thermal capillary waves [J].