Density-PDFs and Lagrangian statistics of highly compressible turbulence |
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Authors: | Ch. Beetz |
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Affiliation: | Theoretische Physik I, Ruhr-Universität Bochum, Germany |
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Abstract: | 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 5123 collocation points and 2 million tracer particles integrated over several dynamical times. |
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Keywords: | 47.11.Df 47.27.E- 47.40.Ki 98.38.Am |
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