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- W2296173664 abstract "We study the asymptotic behavior of the motion of an ideal incompressible fluid in a perforated domain. The porous medium is composed of inclusions of size $varepsilon$ separated by distances $d_varepsilon$ and the fluid fills the exterior. If the inclusions are distributed on the unit square, the asymptotic behavior depends on the limit of $frac{d_{varepsilon}}varepsilon$ when $varepsilon$ goes to zero. If $frac{d_{varepsilon}}varepsilonto infty$, then the limit motion is not perturbed by the porous medium, namely we recover the Euler solution in the whole space. On the contrary, if $frac{d_{varepsilon}}varepsilonto 0$, then the fluid cannot penetrate the porous region, namely the limit velocity verifies the Euler equations in the exterior of an impermeable square. If the inclusions are distributed on the unit segment then the behavior depends on the geometry of the inclusion: it is determined by the limit of $frac{d_{varepsilon}}{varepsilon^{2+frac1gamma}}$ where $gammain (0,infty]$ is related to the geometry of the lateral boundaries of the obstacles. If $frac{d_{varepsilon}}{varepsilon^{2+frac1gamma}} to infty$, then the presence of holes is not felt at the limit, whereas an impermeable wall appears if this limit is zero. Therefore, for a distribution in one direction, the critical distance depends on the shape of the inclusions. In particular it is equal to $varepsilon^3$ for balls." @default.
- W2296173664 created "2016-06-24" @default.
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- W2296173664 date "2014-07-10" @default.
- W2296173664 modified "2023-09-27" @default.
- W2296173664 title "Impermeability through a perforated domain for the incompressible 2D Euler equations" @default.
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