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December 25, 2014, 04:17 |
the boundary condition problem
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#1 |
New Member
Hao
Join Date: Dec 2014
Location: Beijing, China
Posts: 6
Rep Power: 11 |
Hello everyone,I have a model. The inlet boundary is pressure which is changing. Now I want to know the outlet pressure by simulation of CFX. The outlet condition is connected to a throttle valve. So, how I should set the outlet boundary condition?
Thank you for helping me to solve this problem. |
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December 25, 2014, 04:21 |
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#2 |
New Member
Hao
Join Date: Dec 2014
Location: Beijing, China
Posts: 6
Rep Power: 11 |
Tt is a transient problem.
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December 25, 2014, 04:41 |
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#3 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
If you want the outlet pressure then you must know the flow rate. So use a massflow outlet.
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December 30, 2014, 06:33 |
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#4 |
Senior Member
Marcin
Join Date: May 2014
Location: Poland, Swiebodzin
Posts: 229
Rep Power: 12 |
on the first step (in my opinion) you can make static pressure 0 Pa on the outlet and define a plane before outlet to determine pressure
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December 30, 2014, 22:01 |
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#5 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
But the outlet pressure is 0 because that is what you defined it to be. So why do you need another plane to give you an outlet pressure value?
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