reveresed flow and boyancy driven flows
 

hi, i am simulating cooling of cylinder dipped in oil using bouyancy driven model in fluent.but my temerpature history is not accurate.if i use pressure inlet condition the temperature at boundaries at the start is accurate. but i have reversed flow on boundaries.can any body help me. nabeel mohsin

Re: reveresed flow and boyancy driven flows
 

Try using outlet condition after some distance.... the flow could be disturbed... at the outlet and you get reverse flow... use outlet as per fluent's manual...or if you're getting converged mass and energy you're okay....

AJ

Re: reveresed flow and boyancy driven flows
 

Why do you expect no reverse flow??? Do you have oil and air in the domain????

AJ

Re: reveresed flow and boyancy driven flows
 

hi, i have oil in domain and pressure inlet in outer cylinder condition. nabeel