.ThermalSeparation.FilmModel.StructuredPackedColumn.EnhancementMS.InterfacialArea .ThermalSeparation.FilmModel.StructuredPackedColumn.EnhancementMS.InterfacialAreamodel InterfacialArea = ThermalSeparation.HeatAndMassTransfer.InterfacialArea.StructuredPackedColumn.RochaStructured;