Separation for the stationary Prandtl equation
Separation for the stationary Prandtl equation
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DOI:
10.1007/s10240-019-00110-z
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发表时间:
2018-02
期刊:
影响因子:
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通讯作者:
Anne-Laure Dalibard;N. Masmoudi
中科院分区:
文献类型:
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作者:
Anne-Laure Dalibard;N. Masmoudi
In this paper, we prove that separation occurs for the stationary Prandtl equation, in the case of adverse pressure gradient, for a large class of boundary data at. We justify the Goldstein singularity: more precisely, we prove that under suitable assumptions on the boundary data at, there existssuch thatasfor some positive constant, whereis the solution of the stationary Prandtl equation in the domain. Our proof relies on three main ingredients: the computation of a “stable” approximate solution, using modulation theory arguments; a new formulation of the Prandtl equation, for which we derive energy estimates, relying heavily on the structure of the equation; and maximum principle and comparison principle techniques to handle some of the nonlinear terms.