Abstract
A numerical study of unsteady turbulent fluid flow over ERCOFTAC flat-plate T3A is represented. Four uniform flow rates are applied to an initially fully turbulent steady flow. The γ-SST turbulence model is adopted to determine the boundary layer development, analysis of turbulence structures, and the wall functions response in the presence of external acceleration. It is observed that imposing higher momentum rates affect the boundary layer thickness. Furthermore, enforced flow rate can change the shape of eddies and make them more stretched. Phase delay in turbulence propagation under this condition is the same as in previous studies. However, the quality and quantity of turbulence phase delay in two streamwise and wall-normal directions are investigated and compared with available experimental and numerical solutions. It is perceived that the amount of delay for each distinct acceleration, alongside the plate and at a specific distance from the wall, is almost the same. Whereas, in the normal direction, the delay is variable and emanates from the physical eddies shape. Moreover, in boundary layer, the outer region affeccted more severely than the near-wall region.
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