INFLUENCE OF DROPLETS' TRAJECTORIES AND SIZE DISTRIBUTION ON HEAT TRANSFER FROM A WEDGE IN AN AIR-WATER MIST FLOW

Abstract

This study investigates the heat transfer mechanisms of a uniform wall heat flux wedge located in an air-water mist flow. In order to yield a physical model closer to the realistic situation, two important factors are considered, namely droplet trajectories and the size distribution of polydisperse droplets. An equivalent diameter is adopted to economize computing time. An effective numerical method is proposed to solve the governing equations simultaneously. The effect of the three kinds of heat transfer mechanisms—gas-phase convective heat transfer, water film sensible heat transfer, and evaporation heat transfer—on the heat transfer coefficient are examined in detail.