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arXiv 1002.4126math-phmath.MP
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边界有涡产生的扁圆柱上的纳维-斯托克斯方程

Navier-Stokes equations on the flat cylinder with vorticity production on the boundary

Carlo Boldrighini, Paolo Buttà

摘要:

本文研究了二维扁柱上的Navier-Stokes方程组,速度场u采用通常的Dirichlet边界条件。我们制定的问题作为一个无限系统的常微分方程的自然傅立叶分量的涡量,并考虑到边界条件,通过添加一个涡量生产的边界。我们证明了等价于原来的Navier-Stokes系统,并表明傅立叶模式的衰减是指数的任何正时间在周期方向上,但它只是在其他方向上的幂。

英文摘要:

We study the two-dimensional Navier-Stokes system on a flat cylinder with the usual Dirichlet boundary conditions for the velocity field u. We formulate the problem as an infinite system of ODE's for the natural Fourier components of the vorticity, and the boundary conditions are taken into account by adding a vorticity production at the boundary. We prove equivalence to the original Navier-Stokes system and show that the decay of the Fourier modes is exponential for any positive time in the periodic direction, but it is only power-like in the other direction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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