Comments on ’’Ratio of scalar and velocity dissipation time scales in shear flow turbulence’’
نویسندگان
چکیده
منابع مشابه
effect of sub-grid scales on large eddy simulation of particle deposition in a turbulent channel flow
چکیده ندارد.
15 صفحه اولScalar dissipation rate and dissipative anomaly in isotropic turbulence
We examine available data from experiment and recent numerical simulations to explore the supposition that the scalar dissipation rate in turbulence becomes independent of the fluid viscosity when the viscosity is small and of scalar diffusivity when the diffusivity is small. The data are interpreted in the context of semi-empirical spectral theory of Obukhov and Corrsin when the Schmidt number...
متن کاملGeometry of intensive scalar dissipation events in turbulence.
The maxima of the scalar dissipation rate in turbulence appear in the form of sheets and correspond to the potentially most intensive scalar mixing events. Their cross section extension determines a locally varying diffusion scale of the mixing process and extends the classical Batchelor picture of one mean diffusion scale. The distribution of the local diffusion scales is analyzed for differen...
متن کاملIntermittent Dissipation of a Passive Scalar in Turbulence
M. Chertkov,1 G. Falkovich,2 and I. Kolokolov3 1Physics Department, Princeton University, Princeton, New Jersey 08544 2Institute for Advanced Study, Princeton, New Jersey and Weizmann Institute, Rehovot, Israel 3Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia (Received 3 September 1997) The probability density function (PDF) of passive scalar dissipation P sed is found analytica...
متن کاملOn the Origin of Solar Photospheric Turbulence: Granular Velocity Shear
We trace the Doppler velocity and turbulent velocity elds at diierent heights in the solar overshoot layers using absorption lines of diierent strengths in spec-trograms taken at the center of the solar disk. We show the results for one regular and one exploding granule as two representative examples. The convec-tive velocity patterns do not change with the height up to 200km above 5000 = 1, ne...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 1978
ISSN: 0031-9171
DOI: 10.1063/1.862193