한국전산유체공학회:학술대회논문집

Korean Society of Computational Fluids Engineering (한국전산유체공학회)
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Direct numerical simulation of passive scalar in decaying compressible turbulence

  • Li Xinliang (LNM, Institute of Mechanics, CAS, Beijing China) ;
  • Fu Dexun (LNM, Institute of Mechanics, CAS, Beijing, China) ;
  • Ma Yanwen (LNM, Institute of Mechanics, CAS, Beijing, China)
  • Published : 2003.10.01
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Abstract

n this paper, direct numerical simulation of decaying compressible turbulence with passive scalar is performed by using 7th order upwind difference scheme or 8th order group velocity control scheme. The start Reynolds number (defined by Taylor scale) is 72 and turbulent Mach numbers are 0.2-0.9. The Schmidt numbers of passive scalar are 2-10. The Batchelor k-1 range are found in scalar spectra, and the high wavenumber spectra decays faster with increasing turbulent Mach number. The extend self-similarity (ESS) is found in the passive scalar in compressible turbulence.

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