热分层平面-库埃特流平均速度剖面的形状和标度

IF 1.3 4区工程技术 Q3 MECHANICS

Fluid Dynamics Research Pub Date : 2021-12-21 DOI:10.1088/1873-7005/ac451a

Dongrong Zhang

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引用次数: 1

摘要

长期以来，从测量中已经知道，浮力运动导致热分层、壁面湍流中的平均速度分布（MVP）显著偏离其恒定密度对应物。理论分析将注意力限制在MVP的“中间层”上，类似于恒定密度情况下著名的“对数层”。在这里，对于热分层平面Couette流，我们研究了整个MVP的形状和比例。我们通过使用光谱链接的框架来阐明决定MVP形状的机制（Gioia等人，2010 Phys.Rev.Lett.105 184501），并通过推广Monin-Obukhov相似性理论来获得整个MVP的比例律。

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Shape and scaling of the mean-velocity profile in thermally-stratified plane-Couette flows

It has long been known from measurements that buoyant motions cause the mean-velocity profile (MVP) in thermally-stratified, wall-bounded turbulent flows to significantly deviate from its constant-density counterpart. Theoretical analysis has restricted attention to an ‘intermediate layer’ of the MVP, akin to the celebrated ‘log layer’ in the constant-density case. Here, for thermally-stratified plane-Couette flows, we study the shape and scaling of the whole MVP. We elucidate the mechanisms that dictate the shape of the MVP by using the framework of the spectral link (Gioia et al 2010 Phys. Rev. Lett. 105 184501), and obtain scaling laws for the whole MVP by generalizing the Monin-Obukhov similarity theory.

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来源期刊

Fluid Dynamics Research 物理-力学

CiteScore

2.90

自引率

6.70%

发文量

审稿时长

5 months

期刊介绍： Fluid Dynamics Research publishes original and creative works in all fields of fluid dynamics. The scope includes theoretical, numerical and experimental studies that contribute to the fundamental understanding and/or application of fluid phenomena.