Influence of fluid distributionon the wall shear stress in a plane ultrafiltration module using an electrochemical method

摘要

The wall shear stress is determined at the surface of a plane sheet of 'Plexiglas', taking the place of a membrane, using an electrochemical method. Several microelectrodes are mounted flush to this plate and maps of shear stress and flow regime are determined for several inlet and outlet systems. The experimental measurements emphasize the same heterogeneity of wall shear stress for all the configurations investigated. Furthermore, whatever the configuration, the study of the turbulence features of the flow shows a transition flow regime in the range of Reynolds numbers investigated. The comparison of wall shear stresses and turbulent intensity rates obtained for each inlet/outlet system allows the determination of the best configuration.