.ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.HeatTransferInner .ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_advanced.HeatTransferInnermodel HeatTransferInner = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Generic_HT.IdealHeatTransfer_L2;