NUMERICAL SIMULATION OF THERMAL PLUME ABOVE COMMERCIAL COOKING GAS STOVE USING CFD ANALYSIS (PART 1): TEMPERATURE AND VELOCITY DISTRIBUTIONS OF EXHAUST GAS, AND CAPTURE EFFICIENCY OF EXHAUST HOOD UNDER OPEN FLAME CONDITION

In this study, prediction method for thermal plume above the gas stove under open flame condition and for the capture efficiency of exhaust hood were investigated with CFD. The buoyancy production term of turbulent energy in the standard k-ε model was improved with general gradient diffusion hypothesis instead of standard gradient diffusion hypothesis widely used in the standard k-ε model. The calculated results of the temperature and velocity distribution in the plume above the gas stove exhibited good correspondence with the experimental results. The calculated capture efficiency of the exhaust hood was also in good agreement with the experimental results.