In this paper,the authors study the 1D steady Boltzmann flow in a channel.The walls of the channel are assumed to have vanishing velocity and given temperaturesθ0 and θ1.This problem was studied by Esposito-Lebowitz-Marra(1994,1995)where they showed that the solution tends to a local Maxwellian with parameters satisfying the compressible Navier-Stokes equation with no-slip boundary condition.However,a lot of numerical experiments reveal that the fluid layer does not entirely stick to the boundary.In the regime where the Knudsen number is reasonably small,the slip phenomenon is significant near the boundary.Thus,they revisit this problem by taking into account the slip boundary conditions.Following the lines of[Coron,F.,Derivation of slip boundary conditions for the Navier-Stokes system from the Boltzmann equation,J.Stat.Phys.,54(3-4),1989,829-857],the authors will first give a formal asymptotic analysis to see that the flow governed by the Boltzmann equation is accurately approximated by a superposition of a steady CNS equation with a temperature jump condition and two Knudsen layers located at end points.Then they will establish a uniform L∞ estimate on the remainder and derive the slip boundary condition for compressible Navier-Stokes equations rigorously.

Renjun DUAN;Shuangqian LIU;Tong YANG;Zhu ZHANG

Department of Mathematics,The Chinese University of Hong Kong,Shatin,Hong Kong,China;School of Mathematics and Statistics and Hubei Key Laboratory of Mathematical Sciences,Central China Normal University,Wuhan 430079,China;Department of Applied Mathematics,The Hong Kong Polytechnic University,Hong Kong,China

数学年刊B辑（英文版）

[1]Renjun DUAN;Shuangqian LIU;Tong YANG;Zhu ZHANG-.Heat Transfer Problem for the Boltzmann Equation in a Channel with Diffusive Boundary Condition)[J].数学年刊B辑（英文版）,2022(06):1071-1100

Esposito,Lebowitz,Marra,Coron

Heat,Transfer,Problem,Boltzmann,Equation,Channel,Diffusive,Boundary,Condition,In,this,paper,authors,study,1D,steady,flow,channel,walls,are,assumed,have,vanishing,velocity,given,temperatures,This,problem,was,studied,by,where,they,showed,that,solution,tends,local,Maxwellian,parameters,satisfying,compressible,Navier,Stokes,slip,boundary,However,lot,numerical,experiments,reveal,fluid,does,not,entirely,stick,regime,Knudsen,number,reasonably,small,phenomenon,significant,near,Thus,revisit,taking,into,account,conditions,Following,lines,Derivation,system,from,Stat,Phys,will,first,formal,asymptotic,analysis,see,governed,accurately,approximated,superposition,CNS,jump,two,layers,located,points,Then,establish,uniform,estimate,remainder,derive,equations,rigorously

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