Reply To: Doubt about reversed flow in ansys fluent

[Rob]

Reverse flow means you have material entering the domain at an outlet, or leaving at an inlet. Strictly speaking it's not a problem, but if you don't know what it's happening, or you have incorrect boundary values set it can influence the result to give a physically incorrect result: Fluent may converge as the solution is correct for the values set. 

What does the post processing tell you about the flow field?