Numerical study of double diffusive convection due to lateral heating in a rotating annulus

Title & Authors
Numerical study of double diffusive convection due to lateral heating in a rotating annulus
Gang, Sin-Hyeong; Lee, Gyo-Seung; Lee, Jin-Ho;

Abstract
Numerical investigations were conducted to study the convective phenomena of an initially stably stratified salt water solution with lateral heating in a uniformly rotating annulus. The method of investigation is the finite difference analysis of the basic conservation equation for an axisymmetric, unsteady, double-diffusive convection and calculation is made for R $\small{a_{\eta}}$=2*10$\small{^{5}}$ and Ta=10$\small{^{7}}$ ~ 2.5*10$\small{^{8}}$ . Formation of layered flow structure, merging process of layers, the corresponding temperature and concentration distributions, Nu variation with time are examined. Numerical results show that in each layer, the temperature profile looks 'S'-shaped and the concentration profile is uniform due to the convective mixing. At the interface between adjacent layers, the temperature changes smoothly but the concentration changes rapidly. As the effect of the rotation increases, the generation of rolls at hot wall, the formation and merging of layers are delayed. The average Nu shows the trend of conduction heat transferees the effect of the rotation increases.n increases.
Keywords
Double-Diffusive Convection;Rotation;Stratification of Concentration;Lateral Heating;Multi-Layer Flow Structure;
Language
Korean
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