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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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