NUMERICAL STUDY OF NONISOTHERMAL THREE-DIMENSIONAL ROOM AIRFLOW : Room airflow analysis by means of algebraic stress model Part 4

Abstract

In this paper, three-dimensional non-isothermal flowfield is simulated by the two types of turbulence models, the k-ε model and Algebraic stress model (hereafter abbreviated as ASM). These results are compared with the experimental ones. The predicted distributions of velocity, temperature and turbulent energy by ASM generally denote less steep gradients and agree with the experiment better than does the k-ε model. This advantage of ASM over the k-ε model is attributed mainly to the difference of the evaluation of the Reynolds stresses (u_iu_j) and the turbulent heat fluxes (u_jθ).