1995•NASA STI/Recon Technical Report NRequires access

Applications of direct numerical simulation of turbulence in second order closures

Tsan-Hsing Shih, John L. Lumley

Abstract

This paper discusses two methods of developing models for the rapid pressure-strain correlation term in the Reynolds stress transport equation using direct numerical simulation (DNS) data. One is a perturbation about isotropic turbulence, the other is a perturbation about two-component turbulence -- an extremely anisotropic turbulence. A model based on the latter method is proposed and is found to be very promising when compared with DNS data and other models.

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Available abstract

Key concepts: Turbulence, Direct numerical simulation, Reynolds stress equation model, K-epsilon turbulence model, Isotropy, K-omega turbulence model, Reynolds stress, Perturbation (astronomy)