Numerical simulation of turbulent Rayleigh-Benard convection

被引：1
|
作者：
Palymskiy, Igor [1 ]
机构：
[1] Modern Univ Humanities, Dept Math, Hovosibirsk Branch, Novosibirsk 630064, Russia
来源：
PROGRESS IN COMPUTATIONAL FLUID DYNAMICS | 2012年 / 12卷 / 04期
关键词：
numerical simulation; turbulence; convection; DNS; pseudo-spectral method; heat and mass transfer; Boussinesq approach; TEMPERATURE-FLUCTUATIONS; NUMBER; LAYER;
D O I：
10.1504/PCFD.2012.048256
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The turbulent convection of liquid in a horizontal layer is simulated numerically for the case of heating from below. The liquid is assumed to be viscous and incompressible, and the layer boundaries are assumed to be flat, isothermal, and free from shear stress. The Boussinesq approach without any semi-empirical relationships (DNS) has been used and the flow is considered to be three-dimensional and non-stationary. The special pseudo-spectral method with resolution 65(3) of harmonics and Prandtl number equal to 10 is used. The present 3D, free simulation shows that exponent of power law at r >= 150 for temperature pulsations -2/15 coincides with the experimental result and that exponent of power laws for vertical velocity pulsations 0.4 and Reynolds number 0.5 are close to known experimental and numerical results. The same is also true for kinetic energy and rms velocity.
引用
收藏
页码：243 / 250
页数：8
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