At the beginning I posted the velocity contour in which air was the working fluid. I expect to have that type of result. I do not expect to have any fluid flow going out or coming in at the end of the result.
Summary-> What I expect is like that: (this result is for air as I mentioned in my first post)
What I get: (this result is for oil as I mentioned in my first post)
Both results are taken at the end of the simulation.
I asked my supervisor about it and he said no problem. However, I belive there is something off with this result.