期刊
PHYSICS LETTERS A
卷 372, 期 17, 页码 3037-3041出版社
ELSEVIER
DOI: 10.1016/j.physleta.2008.01.009
关键词
compressible flows; Lagrangian statistics
In isothermal, highly compressible turbulent flows, density fluctuations follow a log-normal distribution. We establish a connection between these density fluctuations and the probability-density-functions (PDF) of Lagrangian tracer particles advected with the flow. Our predicted particle statistics is tested against large scale numerical simulations, which were performed with 512(3) collocation points and 2 million tracer particles integrated over several dynamical times. (c) 2008 Elsevier B.V. All rights reserved.
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