A revised two-equation model of turbulence

Modifications to a transport model which characterizes turbulence by the specific kinetic energy of the fluctuating motion and the time-mean square of the vorticity fluctuations (W) are described. Partial differential equations expressing the conservation of these quantities are solved numerically, along with those for the momentum and enthalpy. Modeling of the near-wall region is emphasized. Unlike the earlier version of the model, the same set of the asymptotic high Reynolds-number values of the model constants is used in all calculations. Predictions of fluid flow and heat transfer are compared with experimental data and predictions based on the earlier model. The model performs as well as, or better than, the original version, and does not need the near-wall fix of the latter. Agreement with experiment is at least as good as that of the model in which dissipation rate of the turbulence energy is used in place of W.