Evaluation of Various Turbulence Models in Predicting Airflow and 1 Turbulence in Enclosed Environments by CFD : Part - 1 : 2 Summary of Prevalent Turbulence Models

Evaluation of Various Turbulence Models in Predicting Airflow and 1 Turbulence in Enclosed Environments by CFD: Part-1: 2 Summary of Prevalent Turbulence Models 3 4 Zhiqiang Zhai Zhao Zhang Wei Zhang Qingyan Chen 5 Member ASHRAE Student Member ASHRAE Member ASHRAE Fellow ASHRAE 6 7 Air distributions in enclosed environments are crucial to thermal comfort and air quality. 8 Computational fluid dynamics (CFD) has been playing an important role in evaluating and 9 designing various air distributions. Many factors can have influence on the applications of CFD 10 for studying air distributions. The most critical factors are the selection of an appropriate CFD 11 approach and a turbulence model. Recent advances in CFD approaches and turbulence models 12 provide a great potential of improving prediction accuracy of air distributions in enclosed 13 environments. This paper summarized recent progress in CFD turbulence modeling and 14 applications to some practical indoor environment studies. This paper also described the 15 turbulence models that either are commonly used or have been proposed and used recently for 16 indoor environment modeling. Finally, this study further identified a few turbulence models that 17 show great potential for modeling airflows in enclosed environments. A companion paper 18 presents the evaluation of the selected models by using experimental data from the literature. 19