An improved mass transfer model for film condensation numerical simulation

Numerical simulation for condensation applications is restricted by phase change modeling. The mass transfer relaxation coefficient in the Lee model is commonly an empirical constant, which makes sim-ulation work inefficient due to the trouble in coefficient determination. An improved model has been developed to resolve this weakness by introducing a controllable parameter of interfacial temperature difference. The model was carefully validated in good agreement with the results from Nusselt's theory, empirical correlation, and experimental study. The parameter was demonstrated to play a key role that affects interfacial behavior significantly. The condensation heat transfer tended to be accurate when the parameter was reduced to a certain degree. Further, the developed model was used to investigate con-densation heat transfer for inclined plates, microgravity environments, and flowing vapor. The model was capable of capturing heat transfer characteristics for these condensation applications. Despite the simplic-ity of the model, it is believed that this study will support future research and application in targeting the field of multiphase flow in engineering. (c) 2022 Elsevier Ltd. All rights reserved.