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Boundary conditions' types

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Old   June 9, 2010, 09:55
Default Boundary conditions' types
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Hello everyone,

I am a new user of openFOAM (pretty cool for the moment)
and I would like to know what is the difference between these pressure boundary conditions' types :

1) buoyantPressure
2) zeroGradient

and more generally what is "zeroGradient" used for ?

I would appreciate it if you could help to find a good reference explaining the most common boundary condtions (and their types)

Thanks a lot !
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