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arXiv 2104.03447math.AP
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半空间中扩散反射边界条件下Boltzmann方程的边界层解

Boundary Layer Solution of the Boltzmann Equation for Diffusive Reflection Boundary Conditions in Half-space

Yong Wang, Feimin Huang

摘要:

研究了半空间中的定常Boltzmann方程,该方程起源于具有漫反射边界条件的Knudsen边界层问题。在一定的容许条件下,当Maxwell方程的远场马赫数为零时,在$L^\infty_{x,v}$中建立了具有漫反射边界条件的半空间线性和非线性Boltzmann方程的边界层解的存在性.得到了解的连续性和空间衰减性。在一定的约束条件下,证明了该解的唯一性.

英文摘要:

We study steady Boltzmann equation in half-space, which arises in the Knudsen boundary layer problem, with diffusive reflection boundary conditions. Under certain admissible conditions and the source term decaying exponentially, we establish the existence of boundary layer solution for both linear and nonlinear Boltzmann equation in half-space with diffusive reflection boundary condition in $L^\infty_{x,v}$ when the far-field Mach number of the Maxwellian is zero. The continuity and the spacial decay of the solution are obtained. The uniqueness is established under some constraint conditions.

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