板式蒸发式冷凝器传热传质的数值模拟

onsidering the surface tension momentum source term, heat and mass transfer source term, a computational model using the volume of fluid (VOF) method was established for predicting the heat and mass transfer process of two-phase falling film in plate evaporative condenser. This model was used to analysis the influence of wall heat flux, inlet liquid temperature and air velocity on the temperature distribution and the relative relationship of latent heat transfer and mass transfer. It is found that the temperature of liquid and air increased with the increase of wall heat flux and the temperature gradient discontinuity at the gas-liquid interface. The main manner of heat transfer at the interface of liquid-gas is the latent heat transfer caused by evaporation which is much greater than the sensible heat transfer caused by the temperature gradient. And the results also indicated that the mass transfer increased with the increase of air velocity.