Turbulence transport equations for variable-density turbulence and their relationship to two-field models

Technical Report · Mon Jun 01 00:00:00 EDT 1992

OSTI ID:10160146

Besnard, D ^[1]; Harlow, F H; Rauenzahn, R M; Zemach, C ^[1]

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1. Los Alamos National Lab., NM (United States)

This study gives an updated account of our current ability to describe multimaterial compressible turbulent flows by means of a one-point transport model. Evolution equations are developed for a number of second-order correlations of turbulent data, and approximations of the gradient type are applied to additional correlations to close the system of equations. The principal fields of interest are the one- point Reynolds tensor for variable-density flow, the turbulent energy dissipation rate, and correlations for density-velocity and density- density fluctuations. This single-field description of turbulent flows is compared in some detail to two-field flow equations for nonturbulent, highly dispersed flow with separate variables for each field. This comparison suggests means for improved modeling of some correlations not subjected to evolution equations.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10160146
• Report Number(s): LA-12303-MS; ON: DE92017292
• Resource Relation: Other Information: PBD: Jun 1992
• Country of Publication: United States
• Language: English

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