Influence of a center anode in analogy experiments of long flow ducts

Experiments on chimney systems were performed using a copper electroplating system based on the analogy concept. Numerical investigations were carried out to examine the influence of an anode placed at the center of a chimney system. The chimney heights were varied for RaD = 7.23 × 109 and Sc = 2094. As the chimney height increased, the heat transfer rates were enhanced but the enhancement rate decreased. Comparison of the numerical results with and without the anode showed different velocity and temperature profiles near the anode. However, those near the heated wall exhibited similar values. Thus, the influence of the anode was negligible at a heated wall. This study provides a theoretical background of using an anode to simulate chimney phenomena.