# Reversed flow at inlet condition

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 November 17, 2010, 11:50 Reversed flow at inlet condition #1 New Member   saravanakumar Join Date: Mar 2009 Location: United Kingdom Posts: 17 Rep Power: 14 Hi all, I am trying to simulate a trainsient state problem, i am getting the following error " reversed flow in 76 faces on pressure-inlet" could anyone please help me on how to tackle this problem. thank you in advance.....

 November 18, 2010, 06:06 check boundary conditions #2 Member   Join Date: Oct 2010 Posts: 44 Rep Power: 12 hi, there might be variety of reasons for it happening. its difficult to decode this type of error unless the context is clear. if you are solving for a incompressible turbulent flow, it might have to do something with the boundary condition setting such as i) use of a turbulence specification method at inlet; ii) maybe you could use a velocity inlet instead of pressure inlet iii) if u have/haven't set a reference pressure and temperature point check ur problem physics as well, if it justifies a reverse flow as in due to negative velocity (suction) at inlet

November 18, 2010, 06:17
#3
New Member

saravanakumar
Join Date: Mar 2009
Location: United Kingdom
Posts: 17
Rep Power: 14
Thanks siri,

I will try with vel. inlet.

Quote:
 Originally Posted by siri hi, there might be variety of reasons for it happening. its difficult to decode this type of error unless the context is clear. if you are solving for a incompressible turbulent flow, it might have to do something with the boundary condition setting such as i) use of a turbulence specification method at inlet; ii) maybe you could use a velocity inlet instead of pressure inlet iii) if u have/haven't set a reference pressure and temperature point check ur problem physics as well, if it justifies a reverse flow as in due to negative velocity (suction) at inlet

November 23, 2010, 04:50
#4
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Join Date: Oct 2010
Posts: 44
Rep Power: 12
Quote:
 Originally Posted by kellyj994 Great post! It's very nice. Thank you so much for your post.
Kelly you are welcome and thanks for sharing your opinion here. best wishes

S