Diffusion experiments with numerically integrated isotropic turbulence
作者:
James J. Riley,
G. S. Patterson,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1974)
卷期:
Volume 17,
issue 2
页码: 292-297
ISSN:0031-9171
年代: 1974
DOI:10.1063/1.1694714
出版商: AIP
数据来源: AIP
摘要:
Results are presented of computer simulations of particle diffusion on a numerically integrated, decaying isotropic turbulent flow field. The diffusion of both fluid particles and “small” spherical particles is studied. Comparisons are made of the various temporal autocorrelation coefficients. It is found that for “short” times, the Lagrangian (fluid point) velocity correlation is larger than the Eulerian correlation, while for longer times the opposite is true. It is also found in the “small” spherical particle case that as the response time of the particle is increased, the velocity autocorrelation coefficient increases.
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