Thermal lattice Boltzmann simulation for multispecies fluid equilibration
- Department of Electrical and Computer Engineering, Old Dominion University, Norfolk, Virginia 23529 (United States)
- Department of Physics, William and Mary College, Williamsburg, Virginia 23187 (United States)
- NERSC, Lawrence Berkeley Laboratory, Berkeley, California 97320 (United States)
- Institute of Plasma Physics, Czech Academy of Science, Praha 8, (Czech Republic)
The equilibration rate for multispecies fluids is examined using thermal lattice Boltzmann simulations. Two-dimensional free-decay simulations are performed for effects of velocity shear layer turbulence on sharp temperature profiles. In particular, parameters are so chosen that the lighter species is turbulent while the heavier species is laminar--and so its vorticity layers would simply decay and diffuse in time. With species coupling, however, there is velocity equilibration followed by the final relaxation to one large co- and one large counter-rotating vortex. The temperature equilibration proceeds on a slower time scale and is in good agreement with the theoretical order of magnitude estimate of Morse [Phys. Fluids 6, 1420 (1963)]. (c) 2000 The American Physical Society.
- OSTI ID:
- 20217092
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 1 Vol. 62; ISSN PLEEE8; ISSN 1063-651X
- Country of Publication:
- United States
- Language:
- English
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