Direct numerical simulation on turbulent/non-turbulent interface in compressible turbulent boundary layer

摘要

Direct numerical simulations (DNSs) of temporally developing subsonic and supersonic boundary layers are carried out for investigating the turbulent/non-turbulent interface (TNTI). The outer edge of TNTI layer (irrotational boundary) is detected as an isosurface of small vorticity magnitude. The vorticity dynamics is studied near the TNTI with the statistics calculated as a function of the distance from the irrotational boundary.