Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26370
Title: An explicit algebraic Reynolds stress and heat flux model for incompressible turbulence : Part I non-isothermal flow
Authors: So, RMC
Jin, LH
Gatski, TB
Keywords: Algebraic model
Heat flux model
Turbulence model
Issue Date: 2004
Publisher: Springer
Source: Theoretical and computational fluid dynamics, 2004, v. 17, no. 5-6, p. 351-376 How to cite?
Journal: Theoretical and Computational Fluid Dynamics 
Abstract: Tensor representation theory is used to derive an explicit algebraic model that consists of an explicit algebraic stress model (EASM) and an explicit algebraic heat flux model (EAHFM) for two-dimensional (2-D) incompressible non-isothermal turbulent flows. The representation methodology used for the heat flux vector is adapted from that used for the polynomial representation of the Reynolds stress anisotropy tensor. Since the methodology is based on the formation of invariants from either vector or tensor basis sets, it is possible to derive explicit polynomial vector expansions for the heat flux vector. The resulting EAHFM is necessarily coupled with the turbulent velocity field through an EASM for the Reynolds stress anisotropy. An EASM has previously been derived by Jongen and Gatski [10]. Therefore, it is used in conjunction with the derived EAHFM to form the explicit algebraic model for incompressible 2-D flows. This explicit algebraic model is analyzed and compared with previous formulations including its ability to approximate the commonly accepted value for the turbulent Prandtl number. The effect of pressure-scrambling vector model calibration on predictive performance is also assessed. Finally, the explicit algebraic model is validated against a 2-D homogeneous shear flow with a variety of thermal gradients.
URI: http://hdl.handle.net/10397/26370
ISSN: 0935-4964
DOI: 10.1007/s00162-004-0122-8
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