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arXiv · 1906.01808

Cercignani-Lampis boundary in the Boltzmann theory

Hongxu Chen
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Abstract

The Boltzmann equation is a fundamental kinetic equation that describes the dynamics of dilute gas. In this paper we study the local well-posedness of the Boltzmann equation in bounded domain with the Cercignani-Lampis boundary condition, which describes the intermediate reflection law between diffuse reflection and specular reflection via two accommodation coefficients. We prove the local-in-time well-posedness of the equation by establishing an $L^\infty$ estimate. In particular, for the $L^\infty$ bound we develop a new decomposition on the boundary term combining with repeated interaction through the characteristic. Via this method, we construct a unique steady solution of the Boltzmann equation with constraints on the wall temperature and the accommodation coefficient.

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Hongxu Chen. 2019-06-05. Cercignani-Lampis boundary in the Boltzmann theory. https://doi.org/10.3934/krm.2020019

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