Reply To: High velocity flow of air in tube

[Mark Owens]

All CEL expressions use the conservative values of a variable which is the cell value. So areaAve(Pressure)@outlet is the pressure in the cells next to the outlet. If you explicitly want the boundary value use areaAve(Pressure.Boundcon)@outlet see

15.2. Quantitative CEL Functions in Ansys CFX

and

16.1. Hybrid and Conservative Variable Values