ELECTROLYSIS OF A BINARY ELECTROLYTE IN 2-DIMENSIONAL CHANNEL FLOW

Numerical simulations have been performed to analyze the electric curr ent density in an aqueous solution of CuSO4, flowing in a two-dimensio nal channel with finite electrodes placed symmetrically on opposite si des. A Butler-Volmer law is chosen as a boundary condition on the elec trodes for current densities below the limiting current. At limiting c urrent density, two modified boundary conditions at the cathode are de rived. For 0 less than or equal to Pe less than or equal to 25000, com parisons are made with results of other studies, and the agreement is excellent for large values of Pe but differ for Pe similar to 1. For s mall values of the applied voltage and large values of Pe, a semi-anal ytic solution of the electric potential is derived. Copyright (C) 1996 Published by Elsevier Science Ltd