Marangoni shocks in unobstructed soap-film flows
Fluid Dynamics
2015-05-13 v2
Abstract
It is widely thought that in steady, gravity-driven, unobstructed soap-film flows, the velocity increases monotonically downstream. Here we show experimentally that the velocity increases, peaks, drops abruptly, then lessens gradually downstream. We argue theoretically and verify experimentally that the abrupt drop in velocity corresponds to a Marangoni shock, a type of shock related to the elasticity of the film. Marangoni shocks induce locally intense turbulent fluctuations and may help elucidate the mechanisms that produce two-dimensional turbulence away from boundaries.
Keywords
Cite
@article{arxiv.0901.3383,
title = {Marangoni shocks in unobstructed soap-film flows},
author = {T. Tran and P. Chakraborty and G. Gioia and S. Steers and W. Goldburg},
journal= {arXiv preprint arXiv:0901.3383},
year = {2015}
}
Comments
4 pages, 5 figures, published in PRL