A lattice Boltzmann representation of fluid closures for Landau damping |
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| Authors: | Henry Tazewell Linda Vahala Angus I. D. Macnab |
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| Affiliation: | 1. Department of Physics, William &2. Mary, Williamsburg, VA, USA;3. Department of Electrical &4. Computer Engineering, Old Dominion University, Norfolk, VA, USA;5. Cogint, Seattle, WA, USA |
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| Abstract: | A lattice Boltzmann representation of the zeroth moment density closure of Hammett et al. is shown to reproduce Landau exponential decay of a perturbed density profile provided five streaming velocities are included in the lattice model. By contrast, the three streaming velocity model displays numerical instabilities when the dissipation coefficient is reduced to a level that Landau damping dominates the asymptotic density decay. |
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| Keywords: | Landau damping moment closures lattice Boltzmann |
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