Numerical Investigation of Spectrums of Three-Dimensional Turbulent Convection

被引：0

作者：

Palymskiy, I. B. ^{[1
]}

机构：

[1] Modern Univ Humanities Branch, Chair Math, Novosibirsk, Russia

来源：

IZVESTIYA SARATOVSKOGO UNIVERSITETA NOVAYA SERIYA-MATEMATIKA MEKHANIKA INFORMATIKA | 2010年 / 10卷 / 01期

关键词：

simulation; turbulence; hydrodynamics; convection; heat transfer; spectrum;

D O I：

暂无

中图分类号：

O1 [数学];

学科分类号：

0701 ; 070101 ;

摘要：

The three-dimensional turbulent convectional flows of viscous and incompressible fluid in a rectangular parallelepiped numerically is simulated at heating from below. The horizontal boundaries are stress-free and isothermal. The calculated time spectrum of temperature pulsations at supercriticality is equal to 410 in centre of convective cell has a good agreement with experimental data for convection in cryogenic He. The Obukhov - Bolgiano spectra k(-11/5), k(-3) and k(-5) have been found for velocity pulsations. Also for temperature pulsations the Kolmogorov k(-5/3) and k(-2.4) are obtained. Such spectrums denote on temperature behavior as passive admixture and that dominant force for velocity is buoyancy.

引用

页码：62 / 71

页数：10

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