.ClaRa_Obsolete.Basics.ControlVolumes.FluidVolumes.VolumeVLE_3_TwoZones.PressureLoss .ClaRa_Obsolete.Basics.ControlVolumes.FluidVolumes.VolumeVLE_3_TwoZones.PressureLoss1st: choose friction model | 2nd: edit corresponding record
model PressureLoss = ClaRa.Basics.ControlVolumes.Fundamentals.PressureLoss.Generic_PL.LinearSerialZones_L3;