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arXiv physics/0503225physics.flu-dyncond-mat.soft
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关于滑移槽流稳定性的一个注记

A note on the stability of slip channel flows

Eric Lauga, Carlo Cossu

摘要:

本文研究了滑移边界条件对压力驱动槽道流动模态和非模态稳定性的影响。与Gersting(1974)(Phys.Fluids,17)的结果一致,但与Chu(2004)(C.R. Mecanique,332),我们表明,滑移显着增加线性不稳定性的临界雷诺数的值。然而,非模态稳定性分析表明,在亚临界雷诺数下,滑移对扰动的最大瞬态能量增长的影响非常微弱。因此,滑移边界条件不太可能对槽道流中向湍流的过渡产生显著影响。

英文摘要:

We consider the influence of slip boundary conditions on the modal and non-modal stability of pressure-driven channel flows. In accordance with previous results by Gersting (1974) (Phys. Fluids, 17) but in contradiction with the recent investigation of Chu (2004) (C.R. Mecanique, 332), we show that slip increases significantly the value of the critical Reynolds number for linear instability. The non-modal stability analysis however reveals that the slip has a very weak influence on the maximum transient energy growth of perturbations at subcritical Reynolds numbers. Slip boundary conditions are therefore not likely to have a significant effect on the transition to turbulence in channel flows.

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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