Abstract
Two convergence results related to the approximation of the Boltzmann equation by discrete velocity models are presented. First we construct a sequence of deterministic discrete velocity models and prove convergence (as the number of discrete velocities tends to infinity) of their solutions to the solution of a spatially homogeneous Boltzmann equation. Second we introduce a sequence of Markov jump processes (interpreted as random discrete velocity models) and prove convergence (as the intensity of jumps tends to infinity) of these processes to the solution of a deterministic discrete velocity model.
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Wagner, W. Approximation of the Boltzmann equation by discrete velocity models. J Stat Phys 78, 1555–1570 (1995). https://doi.org/10.1007/BF02180142
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DOI: https://doi.org/10.1007/BF02180142