Journal of University of Chinese Academy of Sciences >
Double Diffusive Convection in an Annular Vertical Cavity
Received date: 2004-06-09
Revised date: 2004-07-09
Online published: 2005-03-15
A numerical study is presented of the structure of double diffusive convection in an annual cavity with horizontal heat and mass gradients due to constant temperatures and concentrations along the vertical side-walls,respectively.The buoyancy ratio N =GrS GrT is equal to-1, where GrS and GrT are the solutal and thermal Grashof numbers, respectively.The structures of double diffusive convection in rectangular and annular cavity were compared.Numerical results are reported for the effect of the Le numbers on the thermal (solute)boundary layer and the average rate of heat (mass)transfer Nu(Sh).The results show that the thickness of solutal boundary layer decreases when the Lewis Number increases, but the thermal boundary is not significantly influenced when the Lewis number varies ;contrasting with the steady increase of the Sherwood number, the Nusselt number varies slowly when the Lewis number is higher than 10.
SHI Ke-Feng , LU Wen-Qiang . Double Diffusive Convection in an Annular Vertical Cavity[J]. Journal of University of Chinese Academy of Sciences, 2005 , 22(2) : 152 -156 . DOI: 10.7523/j.issn.2095-6134.2005.2.005
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