.ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.HeatTransferOuter .ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.HeatTransferOutermodel HeatTransferOuter = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Generic_HT.IdealHeatTransfer_L2;