Collect. Czech. Chem. Commun. 1988, 53, 1678-1687

Lateral edge effect in electrodiffusion measurements of wall shear stress

Ondřej Wein

Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol


The influence of three-dimensional diffusion at lateral edges of an electrodiffusion sensor of friction is analysed by the method of singular perturbations for PeL ≫ 1. It is shown that lateral diffusion at PeL ≫ 1 has a more pronounced effect than longitudinal diffusion at the back edge of the sensor, which has hitherto been exclusively considered.