The interaction of shocks and turbulence is a fundamental phenomenon of fluid dynamics, and this interaction is critical in many areas such as aerodynamics, combustion, and astrophysics. Because of the wide range of spatial and temporal scales that exist in these flows and the difficulty in capturing the shock in simulations and measuring it in experiments, the knowledge of the interaction remains limited. The research of shock-turbulence interactions (STI) in TACL is aimed at fundamental understanding of the two-way coupling of shock and turbulence using massively parallel shock-resolving direct numerical simulations. The main focus is on STI when turbulence is strong, where mean Ranking-Hugoniot relations are no longer applicable. We have recently shown that the shock cannot, in general, be treated as a discontinuity as has been the case since the 50’s. Instead, we showed that effects of Reynolds and turbulent Mach numbers the shock structure can be characterized by a new non-dimensional parameter that correspond to a case of incomplete similarity. This collapses our new data as well as that in the literature. The understanding of STI is crucial for supersonic flight and is expected to improve the performance of flying vehicles in the future.
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Some papers on shock-turbulence interactions include theoretical efforts towards finding universal features of the effect of the shock on the turbulence, the structure of the shock, highly-resolved detailed simulations, and some modeling efforts.