Comparative evaluation of four turbulence models for fully-developed, turbulent flows in straight ducts of arbitrary cross-section

摘要

In this work, the following two-equation eddy-viscosity models (EVMs) were evaluated: the linear EVM of Launder and Spalding (1972); the nonlinear (quadratic) EVM of Rubinstein and Barton (1990); and the nonlinear (cubic) EVM of of Craft et al. (1996). In addition, an Explicit Algebraic Stress model (EASM) of Gatski and Speziale (1993), derived from a parent Reynolds Stress Model by invoking various simplifying assumptions, was also investigated. Single-phase, fully-developed, turbulent flows in straight ducts of uniform, but arbitrary cross-section were investigated as test cases. Numerically grid-independent results were obtained for each case under consideration. Results obtained were compared with the available experimental data and numerical results.With respect to local results, the performance of the EASM was generally better than that of the other three models.