An adaptation of the low Mach number approximation for supercritical fluid buoyant flows
An adaptation of the low Mach number approximation for supercritical fluid buoyant flows
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DOI：
10.1016/j.crme.2005.03.004
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发表时间：
2005-05
影响因子：
0.8
通讯作者：
G. Accary;I. Raspo;P. Bontoux;B. Zappoli
中科院分区：
文献类型：
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作者：
G. Accary;I. Raspo;P. Bontoux;B. Zappoli
本文介绍了弱加热驱动的超临界流体浮力流方程的声滤波。由此产生的低马赫数近似值考虑了流体相对于静水压力的可压缩性。使用直接数值模拟的超临界流体流的瑞利-Bénard配置，我们表明，密度分层可以考虑没有进一步的数值努力，是基本的对流不稳定阈值的预测引起的弱加热。引用这篇文章：G. Accary等人，C. R. Mecanique 333（2005年）。
This Note describes an acoustic filtering of the equations governing the supercritical fluid buoyant flow driven by a weak heating. The resulting low Mach number approximation takes into account the compressibility of the fluid with respect to the hydrostatic pressure. Using the direct numerical simulation of a supercritical fluid flow in the Rayleigh–Bénard configuration, we show that the density stratification may be taken into account without further numerical effort and is fundamental for the prediction of the convective instability threshold induced by a weak heating. To cite this article: G. Accary et al., C. R. Mecanique 333 (2005).