In my case i have 200 faces at the outlet and in 19 faces i got reverse flow. As you have mentioned this '' if there are 20k faces at the outlet and most have an outflow of 1 [m/s] and 19 have a minor backflow of -1e-3 [m/s]" how to check the velocities for backflow and oultflow at the oultet in ansys fluent ?
Regarding the area of interest: i am trying to calculate the pressure drop across a channel by substracting the pressure at inlet and outlet and i think my outlet pressure is computed at the exit so is it reason for creating the backflow?
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