数学物理学报 ›› 2023, Vol. 43 ›› Issue (2): 458-480.

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输运系数依赖温度的可压缩辐射流体解的整体存在性

张明玉()   

  1. 潍坊学院数学与信息科学学院 山东潍坊261061
  • 收稿日期:2022-04-29 修回日期:2022-10-19 出版日期:2023-04-26 发布日期:2023-04-17
  • 作者简介:张明玉,E-mail: wfumath@126.com
  • 基金资助:
    山东省自然科学基金(ZR2021QA049)

Global Existence of the Compressible and Radiative Flux with Temperature-Dependent Transport Coefficients

Zhang Mingyu()   

  1. School of Mathematics and Information Science, Weifang University, Shandong Weifang 261061
  • Received:2022-04-29 Revised:2022-10-19 Online:2023-04-26 Published:2023-04-17
  • Supported by:
    Natural Science Foundation of Shandong Province of China(ZR2021QA049)

摘要:

该文主要研究了当粘性系数 $\lambda$ 和热传导系数 $\kappa$ 依赖于温度 $\theta$, 即 $\lambda(\theta)=\theta^\alpha$, $\kappa (\theta)=1+\theta^\beta$, 其中 $\alpha\in[0, +\infty)$, $\beta\in (2, +\infty)$ 时, 带有辐射项的可压缩 Navier-Stokes 方程解的全局存在性和非线性稳定性. 在关于参数 $\alpha$ 和初值的某些假设下, 该文得到了强解的全局存在唯一性. 此外, 在基于时间的一直估计下, 本文还证明了解的非线性指数稳定性. 需要指出的是, 如果 $\alpha$ 较小, 并且增长指数 $\beta$ 任意大, 则初值可以任意大.

关键词: 可压缩 Navier-Stokes 方程, 热辐射, 输运系数依赖温度, 大初值, 整体解

Abstract:

In this paper, we are concerned with the the global existence and non-linear stability of the compressible and radiative Navier-Stokes matrixs when the viscosity $\lambda$ and heat conductivity $\kappa$ depend on temperature $\theta$, i.e., $\lambda(\theta)=\theta^\alpha$, $\kappa(\theta)=1+\theta^\beta$ with $\alpha \in [0, +\infty)$, $\beta \in (2, +\infty)$. The global existence and uniqueness of strong solutions are obtained under the assumptions on the parameter $\alpha$ and initial data. In addition, we also proved the non-linear exponential stability of the solutions on the basis of the fundamental uniform-in-time estimates. It should be note that the initial data could be large if $\alpha$ is small and the growth exponent $\beta $ can be arbitrarily large.

Key words: Compressible Navier-Stokes matrixs, Thermal radiation, Temperature-dependent transport coefficients, Large initial data, Global solutions

中图分类号: 

  • O175.27