Capillarylike fluctuations at the interface of falling granular jets
Langue
en
Article de revue
Ce document a été publié dans
Physical Review Letters. 2008, vol. 100, n° 21, p. 218001
American Physical Society
Résumé en anglais
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 ...Lire la suite >
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.< Réduire
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