ASSESSMENT OF VARIOUS TURBULANCE MODELS IN DISPLACEMENT VENTILATION SYSTEM FOR PREDICTION OF AIRFLOW AND TEMPERATURE DISTRIBUTION WITH EXPERIMENTAL DATA

This work presents an experimental and numerical study for predicting the indoor airflow and temperature distribution by adopting a displacement ventilation system within isothermal office room. Computational fluid dynamics (CFD) are used to simulate the indoor airflow and temperature distribution by using (FLUINT6.3.26) and (GAMBIT2.4.6) software for solving the Navier Stocks, energy and turbulence equations using finite volume techniques. Assessment was applied for different turbulent models (Standard K-Ɛ, RNG K-Ɛ, Realizable K-Ɛ, and SST K-ω) for a case study and its detailed geometry. The numerical results for the four turbulent models was compared with experimental readings. It was concluded that the (RNG K-Ɛ) turbulent model gives more accurate and acceptable results than the other three models.