.ClaRa.Basics.ControlVolumes.SolidVolumes.Check.Validation_NTUcounter_DiscrPipes_Case1 .ClaRa.Basics.ControlVolumes.SolidVolumes.Check.Validation_NTUcounter_DiscrPipes_Case1Validation: NTU method vs. discretized tube models || counter current || evaporating inner side ||H2O