Abstract
The effect of droplet diameter on mist cooling was examined. Using three type of nozzle, we generated three kinds of mist were 174μm, 107μm, and 34μm, respectively. The air and water flow rates were kept constant (Q_a=20l/min and Q_w=0.02l/min.) during the experiment. The air, water, mist flow were impinged vertically on the heated surface up to 600K. It was found that smaller droplets were more effective to cool down the heated surface. The effect of surface roughness was also examined.
