Diffusive Expansion of the Boltzmann equation for the flow past an obstacle
Abstract
The exterior domain problem is essential in fluid and kinetic equations. In this paper, we establish the validity of the diffusive expansion for the Boltzmann equations to the Navier-Stokes-Fourier system up to the critical time in an exterior domain with non-zero passing flow. We apply the L3-L6 framework to the unbounded domain in this paper.
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