Applied Mathematics and Mechanics (English Edition) ›› 2017, Vol. 38 ›› Issue (6): 765-778.doi: https://doi.org/10.1007/s10483-017-2204-8

• Articles •     Next Articles

Scaling laws of compressible turbulence

Bohua SUN   

  1. Department of Mechanical Engineering, Cape Peninsula University of Technology, Cape Town 7535, South Africa
  • Received:2016-05-30 Revised:2017-01-05 Online:2017-06-01 Published:2017-06-01
  • Contact: Bohua SUN E-mail:sunb@cput.ac.za
  • Supported by:

    Project supported by the National Research Foundation of South Africa (No. 93918)

Abstract:

Spatial scaling laws of velocity kinetic energy spectra for the compressible turbulence flow and the density-weighted counterparts are formulated in terms of the wavenumber, dissipation rate, and Mach number by using a dimensional analysis. We apply the Barenblatt's incomplete similarity theory to both kinetic and density-weighted energy spectra. It shows that, within the initial subrange, both energy spectra approach the -5/3 and -2 power laws of the wavenumber when the Mach number tends to unity and infinity, respectively.

Key words: non-linear non-holonomic constraints, quasi-coordinates, fundamental equations of dynamics, spatial scaling law, dimensional analysis, incomplete similarity, compressible turbulence

2010 MSC Number: 

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