Steady, three-dimensional, internally heated convection
Steady, three-dimensional, internally heated convection
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稳定、三维、内部加热对流
DOI：
10.1063/1.858818
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发表时间：
1993
影响因子：
4.6
通讯作者：
B. Travis
中科院分区：
文献类型：
--
作者：
G. Schubert;G. Glatzmaier;B. Travis
对内热、无限普朗特数、Boussinesq流体（Rayleigh数为1.4×104）在内外半径为0.55的球壳和3×3×1矩形盒中的稳态、对称、三维对流模式进行了数值计算。在两种几何形状中都会出现多种对流模式。在笛卡尔几何的图案是由圆柱形冷下降流和广泛的热上升流为主。在球面几何中，图案由以四面体的顶点或立方体的面的中心为中心的圆柱形冷下射组成。冷的下行流圆柱体浸没在上升流的背景中，在上升流的背景中，下行流周围有圆柱形的热浓度（羽流）和热晕。内部加热的球形对流的强制热上升流返回羽流与从下面对流加热的浮力驱动羽流有根本的不同。
Numerical calculations have been carried out of steady, symmetric, three‐dimensional modes of convection in internally heated, infinite Prandtl number, Boussinesq fluids at a Rayleigh number of 1.4×104 in a spherical shell with inner/outer radius of 0.55 and in a 3×3×1 rectangular box. Multiple patterns of convection occur in both geometries. In the Cartesian geometry the patterns are dominated by cylindrical cold downflows and a broad hot upwelling. In the spherical geometry the patterns consist of cylindrical cold downwellings centered either at the vertices of a tetrahedron or the centers of the faces of a cube. The cold downflow cylinders are immersed in a background of upwelling within which there are cylindrical hot concentrations (plumes) and hot halos around the downflows. The forced hot upflow return plumes of internally heated spherical convection are fundamentally different from the buoyancy‐driven plumes of heated from below convection.