.ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L4_advanced.HeatTransferInner .ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L4_advanced.HeatTransferInnermodel HeatTransferInner = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Generic_HT.Constant_L4;