Abstract
By considering the momentum source term of surface tension and the source term of heat transfer in gas-liquid two phase flow, a computational model based on the VOF was established to discuss the rules of the temperature outside tube in the evaporative air cooler.The result shows that under a wind velocity and spray density, the temperature of water near the wall dropped sharply at first, with wall distance increasing, finally to environmental temperature, and with annular angle increase, the temperature of water film increases. And the higher the wind speed, the higher the water film temperature, but the changes of wind speed has little influence on the temperature within less than 60 º angle. The smaller the spray density, the higher water film temperature.
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