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arXiv 2003.10665math.AP
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具有Navier滑移边界条件的非均匀不可压缩流体的Rayleigh-Taylor不稳定性

Rayleigh-Taylor instability for nonhomogeneous incompressible fluids with Navier-slip boundary conditions

Shijin Ding, Zhijun Ji, Quanrong Li

摘要:

研究了具有Navier滑移边界条件的非齐次不可压Navier-斯托克斯方程在无限平板中的Rayleigh-Taylor不稳定性,其中Navier滑移系数没有定义的符号,平板是水平周期的.受文献[18]的启发,我们将Dirichlet边界条件的结果推广到Navier滑移边界条件。结果表明,在Navier滑移边界条件下,“密度随高度增加而增加”的因素仍然起着关键的作用。

英文摘要:

This paper is concerned with the Rayleigh-Taylor instability for the nonhomogeneous incompressible Navier-Stokes equations with Navier-slip boundary conditions around a steady-state in an infinite slab, where the Navier-slip coefficients do not have defined sign and the slab is horizontally periodic. Motivated by [18], we extend the result from Dirichlet boundary condition to Navier-slip boundary conditions. Our results indicate the factor that "heavier density with increasing height" still plays a key role in the instability under Navier-slip boundary conditions.

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