.ClaRa.Components.Furnace.BaseClasses.CombustionChamberBase_additional_HPs.HeatTransfer_CarrierTubes .ClaRa.Components.Furnace.BaseClasses.CombustionChamberBase_additional_HPs.HeatTransfer_CarrierTubesmodel HeatTransfer_CarrierTubes = ClaRa.Basics.ControlVolumes.Fundamentals.HeatTransport.Gas_HT.Convection.Convection_carrierTubes_turbulent_L2;