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July 29, 2013, 15:09 |
Reg. CEL for user-defined boundary condition
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#1 |
Senior Member
nm
Join Date: Mar 2013
Posts: 100
Rep Power: 13 |
Hello,
You don't have to read the entire explanation to answer the query. You can go to the Questions at the bottom. So I have to model a one way valve as a part of a much larger simulation. I was trying to model this by specifying boundary condition which would turn the "interface" into a wall in case pressure difference across is -ve and turn it into an interface(allowing flow) if pressure difference across is +ve (valve open). Since it is a transient simulation and takes a lot of time, I don't want to physically model the valve, but at the same time avoid backflows that might be unrealistic. I did read through the manual carefully, but I might have skipped through a lot of pages(it's too long). So here are my questions: >> How can I access the Pressure on both sides of a "surface" in CFX through expressions: any link to the syntax would do? >> What is the best(fastest) way to average and compare the pressure on both sides of a surface? >>Is there a way to change an interface into a "wall" allowing no normal flow during the simulation, and back? Thank you very much. Any suggestions or comments appreciated. |
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Tags |
averaging, cel, pressure, user defined boundary |
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