Turbulent convection in a spectral model

被引:6
作者
Canuto, VM
Dubovikov, MS
Dienstfrey, A
机构
[1] NASA Goddard Institute for Space Studies, New York, NY, 10025
关键词
D O I
10.1103/PhysRevLett.78.662
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
New laboratory and numerical simulation data on turbulent convection have become available. We generalize a recent spectral model of turbulence, which was previously tested on a variety of homogeneous flows, to treat inhomogeneous flows so as to study thermal convection. The model has no adjustable constants. We recover the available data (for large aspect ratios). We further derive an analytic expression for the Nusselt number versus Rayleigh and Prandtl numbers (in the limit of negligible diffusion).
引用
收藏
页码:662 / 665
页数:4
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