Statistics of mixing in three-dimensional Rayleigh–Taylor turbulence at low Atwood number and Prandtl number one
نویسندگان
چکیده
منابع مشابه
Cascades and dissipation ratio in rotating magnetohydrodynamic turbulence at low magnetic Prandtl number.
A phenomenology of isotropic magnetohydrodynamic (MHD) turbulence subject to both rotation and applied magnetic field is presented. It is assumed that the triple correlation decay time is the shortest between the eddy turn-over time and the ones associated to the rotating frequency and the Alfvén wave period. For Pm=1 it leads to four kinds of piecewise spectra, depending on four parameters: in...
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Dynamo action in a fully helical Beltrami (ABC) flow is studied using both direct numerical simulations and subgrid modeling. Sufficient scale separation is given in order to allow for largescale magnetic energy build-up. Growth of magnetic energy obtains down to a magnetic Prandtl number PM = RM/RV close to 0.005, where RV and RM are the kinetic and magnetic Reynolds numbers. The critical magn...
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In turbulent MHD systems where the ratio of fluid viscosity and magnetic diffusivity (the magnetic Prandtl number, Pr = ν/η) is very large, there exists a broad range of subviscous scales available to magnetic fluctuations, but not to hydrodynamic ones. This MHD regime is encountered, for example, in such astrophysical environments as the interstellar medium and protogalactic plasmas, where Pr ...
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ژورنال
عنوان ژورنال: Physics of Fluids
سال: 2010
ISSN: 1070-6631,1089-7666
DOI: 10.1063/1.3371712