Abstract
An experimental study of natural-convection heat and mass transfer flow of a CuS04 + H2SO4 + H2O solution in a horizontal cylindrical annulus is performed using an electrochemical system that enables both opposing or cooperating temperature and concentration gradients to be imposed. The flows have double-diffusive characteristics because of the large difference between the thermal and solutal diffusion rates. It is found that in both cases the interaction between the temperature and concentration fields causes a fingering and multilayer flow structure in the core region. The dimensionless mass transfer rate Sh increases as GrT increased for both the cooperating cases and the opposing cases in present experimental ranges.
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