Dispersion by random velocity fields
Dispersion by random velocity fields
复制标题
随机速度场的色散
DOI:
--
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发表时间:
1975
影响因子:
3.7
通讯作者:
R. Phythian
中科院分区:
文献类型:
--
作者:
R. Phythian
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.