Comparative study of various computational models for triple moments of velocity and scalar in second-order closure (Q1205840)

A comparative assessment of several computational turbulence models for third-order diffusive transport terms, \(\overline{u_ iu_ j\theta}\) and \(\overline{u_ i\theta^ 2}\), in second-order closure equations has been carried out by applying the models to various non-isothermal turbulent flows. The second-order quantities appearing in the models are adopted from directly measured values. The models tested in the present study are: conventional simple gradient model, eddy-damped quasi-normal approximation model, and Weinstock's theoretical model which is derived by formally integrating the Navier-Stokes equation [\textit{J. Weinstock}, J. Fluid Mech. 202, 319-338 (1989; Zbl 0667.76086)].