Dispersion by random velocity fields
- 14 January 1975
- journal article
- Published by Cambridge University Press (CUP) in Journal of Fluid Mechanics
- Vol. 67 (1) , 145-153
- https://doi.org/10.1017/s0022112075000213
Abstract
A simple approximation is proposed for the problem of the dispersion of marked particles in an incompressible fluid in random motion when the probability distribution of the velocity field is taken as Gaussian, homogeneous, isotropic, stationary and of zero mean. Approximations for the Lagrangian velocity correlation function and the dispersion are given and compared with exact computer calculations of Kraichnan. Agreement is found to be good except for time-independent velocity fields and singular wavenumber spectral functions.Keywords
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