Compressible homogeneous shear - Simulation and modelingCompressibility effects were studied on turbulence by direct numerical simulation of homogeneous shear flow. A primary observation is that the growth of the turbulent kinetic energy decreases with increasing turbulent Mach number. The sinks provided by compressible dissipation and the pressure dilatation, along with reduced Reynolds shear stress, are shown to contribute to the reduced growth of kinetic energy. Models are proposed for these dilatational terms and verified by direct comparison with the simulations. The differences between the incompressible and compressible fields are brought out by the examination of spectra, statistical moments, and structure of the rate of strain tensor.
Document ID
19920057509
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sarkar, S. (NASA Langley Research Center Hampton, VA, United States)
Erlebacher, G. (NASA Langley Research Center Hampton, VA, United States)
Hussaini, M. Y. (ICASE; NASA, Langley Research Center Hampton, VA, United States)