The aim of the present investigation is to study the electrolyte flow characteristics in a continuous stirred tank electrochemical reactor (CSTER) using residence time distribution (RTD). The flow behavior of electrolyte has been experimented using pulse tracer technique and the residence time distribution curves at various operating conditions are critically analyzed. A three-parameter model has been developed to explain the flow characteristic of electrolyte in a continuous stirred tank electrochemical reactor and the model simulations are validated with the experimental observations. (C) 2008 Elsevier B.V. All rights reserved.