COMBINED LAMINAR FORCED AND NATURAL CONVECTION MASS TRANSFER FROM A VERTICAL PLATE

Abstract

Local mass transfer rates from a vertical flat plate are measured in the region of combined convective flow. The electrochemical method, i. e., cathodic reduction in a solution of K₄Fe (CN)₆-K₃Fe(CN)₆-NaOH, is applied to mass transfer measurements. The experiments cover a wide range of the combined flow parameter Gr_x/Re_x² and high Schmidt number of approximately 2000. Local Sherwood number in combined flow regime is derived by the integral method and correlated by the parameter Gr_x^1/2/Re_xSc^1/2 in the range 0.73 <Sc< 2000.