Model for Wall Shear Stress from Obliquely Impinging Planar Underexpanded Jets

Though inclined under-expanded planar jets are used in many practical applications, the wall stress resulting from their impingement has not been adequately characterized. Reduced-order models for shear as a function of jet parameters have reported. This work uses computational fluid dynamics to determine nozzle and angle. The simulations impinging validated against experimental data direct numerical simulation; then, varied formulate an empirical relationship maximum pressure ratio, standoff distance, Reynolds number, global expression agrees with results within mean deviation 3%. can be applications where information is required design or assess performance systems, such surface cleaning, particle resuspension surface, cooling.