Accession Number : ADA261840


Title :   Pseudospectral Simulation of Compressible Turbulence Using Logarithmic Variables


Descriptive Note : Technical memo.,


Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CENTER


Personal Author(s) : Shebalin, John V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a261840.pdf


Report Date : Jan 1993


Pagination or Media Count : 23


Abstract : The direct numerical simulation of dissipative highly compressible turbulent flow is performed using a pseudospectral Fourier technique. The governing equations are cast in a form where the important physical variables are the fluid velocity and the natural logarithms of the fluid density and temperature. Bulk viscosity is utilized to model polyatomic gases more accurately and to ensure numerical stability in the presence of strong shocks. Numerical examples include three-dimensional supersonic homogeneous turbulence and two-dimensional shock-turbulence interactions.


Descriptors :   *TURBULENT FLOW , *LOGARITHM FUNCTIONS , VELOCITY , SIMULATION , DENSITY , TEMPERATURE , STABILITY , THREE DIMENSIONAL , FLUID DYNAMICS , VISCOSITY , NAVIER STOKES EQUATIONS , EQUATIONS , SHOCK , VARIABLES , MODELS , INTERACTIONS , TWO DIMENSIONAL , TURBULENCE


Subject Categories : Numerical Mathematics
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE