A STUDY OF DUCT FLOW PASSING IN A HORIZONTAL CHANNEL WITH A CYLINDER SOURCE ADJACENT TO PLANAR BOUNDARY

摘要

The purpose of the present study is to investigate laminar fully developed flow in a horizontal rectangular channel with a cylinder solutal source adjacent to planar boundary. The boundaries in this experiment include four cases: (A) Cylinder is cathode and top plate is anode; (B) Cylinder is anode and top plate is cathode; (C) Cylinder is cathode and bottom plate is anode; (D) Cylinder is anode and bottom plate is cathode. The influences of the mass transfer rate and the boundary types between the sources have also been investigated. An experimental investigation of mixed convection mass transfer between a cylinder and a plate mass source with an electrochemical system is carried in a horizontal rectangular channel. The working fluid here is CuSO_4 + H_2SO_4 + H_2O. The shadowgraph technique is used to visualize the flow and to determine the nature and effect of solutal driven secondary flows in a horizontal channel. The ranges of the parameters in the work are Pr = 7, Ar = 1, Sc = 1700 ～ 2400, Re = 50 ～ 200 (Re_d= 12.5 ～ 50), Gr_m = 9.45 x 10~5, dIH =0.25, hld= 0,3.