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Old   July 12, 2013, 16:23
Default reversed flow
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sajjad bouzari
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hi every one
I'm modeling blood flow in Aorta and I have velocity inlet boundary condition and pressure out lets when I try to iterate, I see this in fluent " reversed flow in xx faces on pressure outlet x". I can't change my boundary conditions so can you help me fix the problem.
and also my case is Laminar , steady ,3d and i use "Least Squares Cell Based"
I really need your help
best regards
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Old   July 14, 2013, 23:12
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Chris DeGroot
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Looks like your problem is not converging very well. Try adjusting relaxation settings and maybe try coupled solver. Also make sure the outlet is far enough downstream that back flow wouldn't be expected physically.
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Old   July 15, 2013, 02:27
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Check your flow direction as well. Or let it iterate for some time, it might stabilize.
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Old   July 15, 2013, 03:04
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I agree with our friend check comment ....let your iteration go ahead and see the result in quess reversed flow will finish after numbers of iterations
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