Getting error in CFX solver manager
 

Hello,
i am trying to simulate 3D model of fluid flow(velocity=2m/s) over a flat plate(thickness=5mm,length=100mm.width=100mm) while running in CFX solver i am getting following error
****** Notice ****** |
| A wall has been placed at portion(s) of an OUTLET |
| boundary condition (at 3.0% of the faces, 0.1% of the area) |
| to prevent fluid from flowing into the domain. |
| The boundary condition name is: OUTLET. |
| The fluid name is: Fluid 1. |
| If this situation persists, consider switching |
| to an Opening type boundary condition instead.
how to fix this error

The problem is obvious: there is a backflow at the position of your outlet.
A pressure outlet cannot handle this, so parts of the outlet are treated as a wall. If the warning message vanishes before your computation converges, then you can live with it. Check the results carefully though.

To prevent this error, move the pressure outlet further downstream to a position where no backflow occurs. This provides less uncertainties than using an opening instead of the pressure outlet like the warning message suggests.

This question has been asked so much it is getting very tedious. Alex, do you want to write an FAQ to cover it? (http://www.cfd-online.com/Wiki/Ansys_FAQ)

Sure, I can give it a try.

Edit: so I finally did it. Sorry for editing my contribution so often

Looks good, thanks.