Evaluation and Development of Simple Evaporation Models Used in Spray Simulations

Given the droplet surface temperature distribution versus time derived from the recent numerical modeling and experimental measurements of a single droplet evaporation, the gas side heat and mass transfer equations used in simple evaporation models for spray simulation in CFD codes are first evaluated. A new model for droplet evaporation is formulated. Instead of using the infinite or conduction limited models for liquid side heat transfer, in the new model, the liquid side heat transfer is simulated based on the Nusselt number. The model is validated against the published data and was found to be accurate in representing the gas and liquid side heat and mass transfer of a single droplet evaporation.