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arXiv 2201.07024math.AP
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满足熵相等的广义Navier-Stokes-Fourier方程组的解

On solutions for a generalized Navier-Stokes-Fourier system fulfilling entropy equality

Anna Abbatiello, Miroslav Bulíček, Petr Kaplický

摘要:

本文考虑了有界区域内的非牛顿导热不可压缩流体的流动,速度场为齐次Dirichlet边界条件,温度场为空间非齐次Dirichlet边界条件。最终的目标是证明当时间趋于无穷大时,流体收敛到平衡状态。然而,为了证明这样的结果,需要处理非常特殊的不等式和非常特殊的检验函数,这通常是不容许的水平上的弱解。在本文中,我们将展示如何克服这些困难。特别是,我们证明了一个解决方案的存在性,满足熵的平等,这似乎是最佳类的解决方案,其中一个应该研究的稳定性结果。

英文摘要:

We consider a flow of non-Newtonian heat conducting incompressible fluid in a bounded domain subjected to the homogeneous Dirichlet boundary condition for the velocity field and the spatially inhomogeneous Dirichlet boundary condition for the temperature. The ultimate goal is to show that the fluid converges to equilibrium as time tends to infinity. However, to justify such result, one needs to deal with very special inequalities and very special test functions, which are typically not admissible on the level of weak solutions. In this paper, we show how one can overcome such difficulties. In particular, we show the existence of a solution fulfilling the entropy equality, which seems to be optimal class of solutions in which one should study the stability result.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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