.ThermalSeparation.FilmModel.StructuredPackedColumn.Enhancement.MassTransferCoeffVap .ThermalSeparation.FilmModel.StructuredPackedColumn.Enhancement.MassTransferCoeffVapmodel MassTransferCoeffVap = ThermalSeparation.HeatAndMassTransfer.StructuredPackedColumn.Vapour.RochaStructured;