A new low Reynolds stress transport model for heat transfer and fluid in engineering applications
Date of Original Version
A new Reynolds stress transport model (RSTM) aimed for engineering applications is proposed with consideration of near-wall turbulence. This model employs the Speziale, Sarkar, and Gatski (SSG) pressure strain term, the ω equation, and the shear stress transport (SST) model for the shear stresses at the near-wall region (say, y+<30). The models are selected based on the following merits: The SSG RSTM model performs well in the fully turbulent region and does not need the wall normal vectors; the ω equation can be integrated down to the wall without damping functions. The SST model is a proper two-equation model that performs well for flows with adverse pressure gradient, while most two-equation models can have a good prediction of the shear stresses. A function is selected for the blending of the RSTM and SST. Three cases are presented to show the performance of the present model: (i) fully developed channel flow with Reτ=395, (ii) backward-facing step with an expansion ratio of 1.2 and Re=5200 base on the step height, and (iii) circular impingement with the nozzle-to-wall distance H=4D and Re =20,000. It is believed that the new model has good applicability for complex flow fields. Copyright © 2007 by ASME.
Publication Title, e.g., Journal
Journal of Heat Transfer
Jia, Rongguang, Bengt Sundén, and Mohammad Faghri. "A new low Reynolds stress transport model for heat transfer and fluid in engineering applications." Journal of Heat Transfer 129, 4 (2007): 434-440. doi: 10.1115/1.2709957.