Reversed Flow
 

Hello CFD lovers :)
How come if you extend the domain a lot and again there is a reversed flow?
I extended the domain extremely far from the inlet, but still I have reversed flow. It is not a complicated case.
The problem is laminar. Even I started from 1st order but it didn't work.
Thanks in advance for your help.

Hi,
Please post a picture of your domain and a contour plot of velocity.

Dear RodriguezFatz,
In fact you brought chance to me since I solved my issue when you responded.
Thanks for your time,
parisa