A revisit of the electro-diffusional theory for the wall shear stress measurement

This article intends to revisit the electro-diffusional theory for wall shear stress measurement from mass transfer probes of rectangular shape by considering existence two components rate (i.e., axial and transversal). General analytical formulas effective length dimensionless transport coefficient were derived as a function parameters: angle flow direction, relative leading edge probe, aspect ratio between width strip probe. The correctness relations arbitrary direction was confirmed numerical solutions equation in convective-diffusive regime. It has also been proved that differences Lévêque solution general formula exhibit significant deviation specific range parameters. In case three-dimensional boundary layers, addition magnitude stress, fluid vicinity probe’s surface is paramount importance. Accordingly, methodology proposed using with different ratios. resulting equations required quantify vector are derived.