Compressibility effects on the growth and structure of homogeneous turbulent shear flowDirect numerical simulations of compressible homogeneous turbulent shear flow are used to provide insight into compressibility effects on turbulence. The simulations show a reduction in the growth rate of the turbulence compared to the incompressible case. Examination of the turbulent kinetic energy budget shows that the reduced growth rate is due to an increase in the dissipation rate due to the divergence of the velocity and to the pressure-dilatation correlation which acts to transfer energy between internal energy and kinetic energy. The structure of the turbulence is also examined. Visualizations of the flowfields reveal the presence of eddy shocklets. These shock structures are important contributors to the increased dissipation of compressible turbulence. A mechanism for the generation of the shocks is suggested.
Document ID
19920057428
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blaisdell, G. A. (Purdue University West Lafayette, IN, United States)
Reynolds, W. C. (Stanford University, CA; NASA, Ames Research Center Moffett Field, CA, United States)
Mansour, N. N. (NASA Ames Research Center Moffett Field, CA, United States)