A Warning message in AFT xStream

Full Message is:

Junction X is downstream of a shock, static/stagnation properties cannot be calculated at junction.

 

This warning will only be generated by pressure type junctions (e.g., Assigned Pressure, Tank). When sonic choking occurs at a pressure type of junction, there is no way to calculate a velocity downstream of the choke point. This means that it is not possible to determine static conditions if you have specified stagnation at the junction, and vice versa. All other results for the model should be accurate except for the static/stagnation pressure, temperature, and enthalpy at the junction.