Hello,nI would use the VOF model for this study (because of your interest in waves and their shape). It seems like you are attempting to capture the interface. If I understand your problem right, you will need three phases - water, water-vapor, and air (inert phase). The mass transfer would occur between water and water-vapor. You should be able to set-up the necessary mass transfer mechanism. In the case of VOF, you can either use the Lee evaporation-condensation model. Please see the following link from the theory guide.nI hope this helps.nKarthikn