Three-dimensional supersonic homogeneous turbulence - A numerical study

Details Three-dimensional supersonic homogeneous turbulence - A numerical study Three-dimensional supersonic homogeneous turbulence - A numerical study

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvl..68.3156p&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 68, no. 21, May 25, 1992, p. 3156-3159. Research supported by DRET, GDR-MFN, and

Statistics

Computation

54

Computational Fluid Dynamics, Homogeneous Turbulence, Supersonic Flow, Three Dimensional Flow, Compressible Flow, Ideal Gas, Shock Wave Propagation

Scientific paper

A turbulent homogeneous perfect gas with no forcing is computed using the piecewise-parabolic method on a uniform grid of 256 cubed zones. The initial rms Mach number is one. The main results are: (1) the persistence of a quasi-supersonic phase with strong density contrasts over several shock-formation times; (2) the late appearance of a postsupersonic self-similarly decaying regime in which the total velocity spectrum varies with wave number as k exp -1; and (3) both shock curvature and velocity gradients are important mechanisms of vorticity production in the first half of the supersonic phase.

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