Comparative Measurements in G\"ortler Vortices Flow Using Split-Fiber and Hot-Wire Velocimetry

We calibrated a Split-Fiber probe in a concave wall for measuring two-dimensional velocity in G\"ortler vortices flow. The subject of this paper is the relative merits of Split-Fiber and Hot-Wire measurement techniques in studies of G\"ortler vortices flow processes as typically encountered in control scenarios for technology applications. A comparison of the two diagnostic systems is made on the basis of simultaneous measurements or local mean velocities and root-mean-square values of velocity fluctuations. Longitudinal and vertical velocity fields in the concave boundary layer, at several streamwise stations was measured by Split-Fiber and wire anemometry. These results corroborate the conclusion made on the effects of perturbations wavelength and amplitude on the heat transfer enhancement by G\"ortler vortices. Where applicable, both measurement techniques yield comparable results, a finding, which is consistent with observations in visualization.