Acta mathematica scientia,Series A ›› 2026, Vol. 46 ›› Issue (2): 683-708.

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Compressible Navier-Stokes-Poisson System Approximation to the Vlasov-Poisson-Boltzmann System

Lina Dong(), Shuangqian Liu(), Xuan Ma(), Yuanyuan Ma*()   

  1. School of Mathematics and Statistics, Central China Normal University, Wuhan 430079
  • Received:2025-12-31 Revised:2026-01-27 Online:2026-04-26 Published:2026-04-27
  • Contact: Yuanyuan Ma E-mail:2163835253@mails.ccnu.edu.cn;sqliu@ccnu.edu.cn;maxuan@ccnu.edu.cn;yyma@mails.ccnu.edu.cn
  • Supported by:
    NSFC(12325107)

Abstract:

When the Knudsen number approaches zero, the compressible Navier-Stokes-Poisson (NSP) system is not the limit of the dimensionless Vlasov-Poisson-Boltzmann (VPB) system; however, via the Chapman-Enskog expansion, it constitutes a second-order approximation to the VPB system. The purpose of this paper is to rigorously prove that if the difference between the local Maxwellian corresponding to the compressible NSP system and the initial value of the VPB system is a second-order small quantity in the Knudsen number, then the solutions of the two systems will maintain this order of magnitude difference for all times. The analysis in this paper is based on the energy estimates of the macroscopic equations, as well as the refined energy method within the macroscopic-microscopic decomposition framework.

Key words: Vlasov-Poisson-Boltzmann system, macroscopic-microscopic decomposition, compressible Navier-Stokes-Poisson system

CLC Number: 

  • O175.2
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