MIXED-CONVECTION HEAT AND MASS TRANSFER IN A FULLY DEVELOPED HORIZONTAL CHANNEL FLOW

An experimental study of mixed-convection heat and mass transfer flow of a CuS0₄ + H₂S0₄ + H₂O solution in a horizontal channel is performed by using an electrochemical system. Unstable temperature and concentration gradients imposed by a heated cathodic bottom initiate an ascending (secondary) flow of light boundary-layer fluid into the freestream. To visualize the flow, the shadowgraph technique is used. Electrical measurements are used to obtain mass transfer rates and to infer a Sherwood number. The ranges of the parameters studied in the present work for the square channel are Pr = 5-7, Sc = 1,700-2,300, Re = 100-1,000, Gr_m= 1.27 X 10⁶ and Gr_ab = 4.06 × 10⁶-2.4S × 10⁷.