Combined Differential Interferometry and Long-range μPIV measurements of a temperature driven boundary layer flow

In the present study Differential Interferometry and Long-range μPIV are successfully combined for a benchmark experiment of an accelerating temperature driven boundary layer flow. Spatial resolutions of 405 pm for the interference and 101 pm for the μPIV measurements could be achieved. The results of the combined measurements are compared with results of numerical simulations. Temperature and velocity profiles are compared with theoretical values and a relation between Nusselt number and Grashof number could be worked out.