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Reversed Flow Error(pressure correction limited...) |
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April 17, 2012, 10:08 |
Reversed Flow Error(pressure correction limited...)
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#1 |
Senior Member
Join Date: Dec 2011
Posts: 121
Rep Power: 14 |
I have a body surrounded by a block(Air).
I considered LeftWall of the block as 'velocity inlet' and Right one as 'pressure outlet' to have a flow with a constant temperature over my heated body to consider the influence of the air on my body. Also i used the default value of the inlet and outlet walls. Using both Coupled and Segregated Solver give me the warning about pressure correction limited on many faces and reversed flow. I appreciate if anyone has any idea or suggestion. |
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April 17, 2012, 10:55 |
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#2 |
Member
hayder
Join Date: Jan 2012
Posts: 32
Rep Power: 14 |
Hi
If you use buoyancy with Boussinesq model ,then double check for the reference temperature (which is most be near the domain temperature ). |
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April 17, 2012, 11:05 |
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#3 | |
Senior Member
Join Date: Dec 2011
Posts: 121
Rep Power: 14 |
Quote:
I did not use the boussineq model. But i ignored the 'gravity' and now it works better.(I get the reversed flow error after the first iterations just for 6 or 7 faces now) Do you know the influence of gravity in my case? can it be ignored? Many thanks in advance. |
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April 17, 2012, 11:54 |
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#4 |
Member
hayder
Join Date: Jan 2012
Posts: 32
Rep Power: 14 |
Hi
If you have an air in touch with hot surface than you have a change in the density, and this will generate a buoyancy. If you ignored the gravity it will solve the issue of reversed flow, but it will not be a realistic flow. |
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April 17, 2012, 18:39 |
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#5 | |
Senior Member
Arjun
Join Date: Mar 2009
Location: Nurenberg, Germany
Posts: 1,273
Rep Power: 34 |
Quote:
It probably means you need to refine the mesh. If you are seeing reverse flow then it could mean your outlet is too close. If possible extend it. |
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