A Warning message in AFT xStream

Full Message text is:

The maximum transient pipe temperature (X) was higher than the estimate (Y). The estimated maximum pipe temperature should be set marginally above the maximum.

 

This warning indicates the maximum temperature in the pipes during the transient simulation is higher than the Estimated Maximum Pipe Temperature During Transient value specified by the user in the Sectioning panel. A temperature higher than the estimate may cause the maximum sonic velocity to be higher than estimated, and in turn mean the time step for the MOC Transient simulation is too small to properly simulate high-velocity flow.

The user should provide a more accurate estimated maximum temperature and re-run the simulation. If high Mach numbers are never seen during the simulation, it may be acceptable to set the estimated maximum pipe temperature lower than the actual maximum temperature.