It is sometimes reported in the heat transfer studies of gaseous media using the near-wall turbulence models that their fully-developed Nu predictions deviate from the experimental correlations. This work approaches the rigorous formulation of the Reynolds-averaged equation in terms of temperature from a fundamental basis, in order to highlight the possible errors due to the usual overapproximation made for the Reynolds-averaged energy equation. It is suggested that Eq. (18) which is one of the rigorous forms of the Reynolds-averaged equation and free of the unknown correlation of the pressure diffusion term is suitable for the analysis of turbulent convective heat transfer in gaseous media.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanical Engineering
- Fluid Flow and Transfer Processes