Direct numerical simulation of hypersonic wall-bounded turbulent flows: An improved inflow boundary condition and applications

In this paper, the method of generating inflow turbulence based on fluctuation library (TFL) in direct numerical simulation (DNS) hypersonic turbulent boundary layer (TBL) is investigated. The application TFL to DNS a supersonic TBL shows that, although there are significant differences freestream between and target TBL, flow could successfully develop downstream as fluctuations suitably scaled added inflow. However, “transition”-like recovery process from turbulence. To deal with defects thermodynamic scaling laws current under new theoretically derived by introducing generalized Reynolds analogy. Mach 7.25 that for more rational accurate than previous ones. Furthermore, study matching degree friction number ( Re ? ) dominant factor determining length distance. Guaranteeing similar can make two possess coherence structures, which avoid distortion structures at after spanwise normal interpolation, prevent stress decay readjustment inflow, finally effectively shorten