.TRANSFORM.HeatExchangers.GenericDistributed_HX_withMass.InternalTraceGen_tube .TRANSFORM.HeatExchangers.GenericDistributed_HX_withMass.InternalTraceGen_tubemodel InternalTraceGen_tube = Fluid.ClosureRelations.InternalTraceGeneration.Models.DistributedVolume_Trace_1D.GenericTraceGeneration;