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#1 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 ![]() |
Hi dear friends
l have an important problem about fluent in modeling a spillway.in results i see negative pressure which is not correct.as a matter of fact,pressure must be positive.on slope,pressure must begin with positive mesure and change along the spillwau.but in my results ,pressure begins with negative mesure.i don't know what the problem is! |
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#2 |
Member
Guiliguili
Join Date: Aug 2010
Location: Montréal
Posts: 97
Rep Power: 16 ![]() |
When you select Pressure, select also Absolute pressure instead of Static Pressure which is chosen by default
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#3 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 ![]() |
Thanks
I try that.but it doesn't work.pressure is still negative.the velocity measures are correct.do you think modeling in gambit is wrong?or is there any special setting in fluent which is effective? Thank you very much |
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#4 |
Member
Guiliguili
Join Date: Aug 2010
Location: Montréal
Posts: 97
Rep Power: 16 ![]() |
I don't think it's about the mesh. How did you set your boundary conditions specially for pressure and your Operating Conditions?
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#5 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 ![]() |
For example:in a simple model consist of a simple slope,i use :
Velocity inlet as input pressure out let as output Symetry Wall. |
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#6 |
New Member
Join Date: Dec 2011
Posts: 10
Rep Power: 14 ![]() |
Operating pressure is 101325
And also i apply variable density parameter 1.225 |
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#7 |
New Member
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To know the reason, you may check these in sequence.
-pressure outlet is the same as you set. -pressure drop between inlet and outlet is reasonable. if this result is available, you then check your simplification model. Maybe there some different between the real model and the simulation model |
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