reveresed flow and boyancy driven flows

July 9, 2004, 07:12

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

July 10, 2004, 18:10

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

July 10, 2004, 18:21

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

AJ

July 16, 2004, 00:16

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

July 9, 2004, 07:12	reveresed flow and boyancy driven flows	#1
nabeel Guest Posts: n/a	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

July 10, 2004, 18:10	Re: reveresed flow and boyancy driven flows	#2
AJ Guest Posts: n/a	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

July 10, 2004, 18:21	Re: reveresed flow and boyancy driven flows	#3
AJ Guest Posts: n/a	Why do you expect no reverse flow??? Do you have oil and air in the domain???? AJ

July 16, 2004, 00:16	Re: reveresed flow and boyancy driven flows	#4
nabeel Guest Posts: n/a	hi, i have oil in domain and pressure inlet in outer cylinder condition. nabeel