Homogenization of the Navier-Stokes equations in perforated domains in the inviscid limit

被引:1
|
作者
Hoefer, Richard M. [1 ]
机构
[1] Univ Regensburg, Fac Math, Regensburg, Germany
关键词
homogenization; perforated domain; Navier-Stokes equations; inviscid limit; Euler equations; Darcy's law; Euler-Brinkman equations; INCOMPRESSIBLE-FLOW; DIVERGENCE OPERATOR; VOLUME DISTRIBUTION; TINY HOLES; FLUID-FLOW; VISCOSITY; EULER; DERIVATION; PARTICLES; LAW;
D O I
10.1088/1361-6544/acfe56
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
We study the solution u(epsilon) to the Navier-Stokes equations in perforated by small particles centered at with no-slip boundary conditions at the particles. We study the behavior of u(epsilon) for small epsilon, depending on the diameter epsilon(alpha), alpha > 1, of the particles and the viscosity epsilon(gamma), gamma > 0, of the fluid. We prove quantitative convergence results for u(epsilon) in all regimes when the local Reynolds number at the particles is negligible. Then, the particles approximately exert a linear friction force on the fluid. The obtained effective macroscopic equations depend on the order of magnitude of the collective friction. We obtain (a) the Euler-Brinkman equations in the critical regime, (b) the Euler equations in the subcritical regime and (c) Darcy's law in the supercritical regime.
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页码:6019 / 6046
页数:28
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