.ScalableTestSuite.Thermal.Advection.Verification.SteamPipe .ScalableTestSuite.Thermal.Advection.Verification.SteamPipeAfter the initial transient has settled down, the step change of the specific enthalpy at the inlet is propagated to the outlet at a velocity roughly equal to that of the fluid. The outlet specific enthalpy is approximately equal to the inlet enthalpy delayed by the ratio tau between the total mass and the mass flow rate. There is a significant effect of numerical diffusion even for large values of N.