Statistics – Computation
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..747x&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 2, p. 747-760.
Statistics
Computation
17
Computational Astrophysics, Computerized Simulation, Hydrodynamics, Massively Parallel Processors, Stellar Convection, Turbulence Models, Compressible Flow, Connection Machine, Dissipation, Laminar Flow, Multiprocessing (Computers)
Scientific paper
We report preliminary implementation of the large-eddy simulation (LES) technique in 2D simulations of compressible convection carried out on the CM-2 massively parallel computer. The convective flow fields in our simulations possess structures similar to those found in a number of direct simulations, with roll-like flows coherent across the entire depth of the layer that spans several density scale heights. Our detailed assessment of the effects of various subgrid scale (SGS) terms reveals that they may affect the gross character of convection. Yet, somewhat surprisingly, we find that our LES solutions, and another in which the SGS terms are turned off, only show modest differences. The resulting 2D flows realized here are rather laminar in character, and achieving substantial turbulence may require stronger forcing and less dissipation.
Toomre Juri
Xie Xin
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