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What causes the buoyancy reversal in compressible convection? (1983)

Chan, K. L.

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Publication Date: 2011-08-18

Description: The problem posed by the existence of a negative buoyancy work region at the top of cellular type convection in a deeply stratified superadiabatic layer (Massaguer and Zahn, 1980) is addressed. It is approached by studying two-dimensional cellular compressible convection with different physical parameters. The results suggest that a large viscosity, together with density stratification, is responsible for the buoyancy reversal. The numerical results obtained are analyzed. It is pointed out, however, that in an astrophysical situation a fluid involved in convection will generally have very small viscosity. It is therefore thought unlikely that buoyancy reversal occurs in this way.

Keywords: ASTROPHYSICS

Type: Astrophysics and Space Science (ISSN 0004-640X); 95; 2, Se; 453-457

Format: text

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