Flowing soap films: a laboratory for studying two-dimensional hydrodynamics

Autor:	Andrew Belmonte, Walter I. Goldburg, X. L. Wu, I. Zusman
Rok vydání:	1998
Předmět:	Physics::Fluid Dynamics Statistics and Probability Physics Turbulence Condensed Matter::Superconductivity Statistical and Nonlinear Physics Probability density function Soap film Statistical physics Mechanics Thermal diffusivity Kármán vortex street Vortex
Zdroj:	Physica A: Statistical Mechanics and its Applications. 254:231-247
ISSN:	0378-4371
DOI:	10.1016/s0378-4371(98)00008-9
Popis:	We present the results of recent experiments in a vertically flowing soap film in which the turbulence is produced by a comb that penetrates the film. After an abbreviated review of the theory of turbulence in two and three dimensions, we discuss two experiments performed in this quasi-two-dimensional system. The first experiment concentrates on measurements of the probability density function for velocity differences on various spatial scales. Special attention is given to the third moment. In the second experiment von Karman vortices are bathed in a background of turbulence, which results in enhanced diffusion-like spreading of the vortex street. A turbulent diffusivity is thereby measured.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c50034c6b14303e048749ca0f42e3c7e https://doi.org/10.1016/s0378-4371(98)00008-9 Zobrazit plný text záznamu Full Text from ScienceDirect