.ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_chem.HeatTransfer .ClaRa.Basics.ControlVolumes.GasVolumes.VolumeGas_L2_chem.HeatTransfermodel HeatTransfer = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Generic_HT.IdealHeatTransfer_L2;