.ThermalSeparation.FilmModel.StructuredPackedColumn.EffectiveDiff.HeatTransferVapour .ThermalSeparation.FilmModel.StructuredPackedColumn.EffectiveDiff.HeatTransferVapourmodel HeatTransferVapour = ThermalSeparation.HeatAndMassTransfer.InterfacialHeatTransferCoefficient.Vapour.Constant;