Surface Pressure Measurements from Multiline Single-Component Molecular Tagging Velocimetry

This study considers the feasibility of estimating the surface pressure distribution based on high-resolution single-component molecular tagging velocimetry. This approach would be helpful in situations where it is not practical to instrument a surface with pressure taps/sensors. The method relies on the connection between the surface pressure gradient and the second order wall-normal derivative of the velocity tangent to the wall. We show the application of this approach to measuring the surface pressure distribution on the circular cylinder in cross flow at Re = 6,000. Results compare favorably with data in the literature.