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symmetry vs. slip Bounday condition

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Old   April 28, 2009, 06:45
Default symmetry vs. slip Bounday condition
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sungho yoon
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I'm not quite sure what is the difference between symmetry boundary condition and slip boundary condition.

According to my understanding, both of them applies zero to normal component and zero gradient to tangential component. dont' they?

Then, what is the difference?

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Sungho
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Old   February 22, 2012, 07:15
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Anne Gerdes
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Hey,
I am asking myself the same question.
Is there an answer already?

Kind Regards
Anne
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Old   February 22, 2012, 08:20
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Felix L.
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Hi, there,


the slip and symmetry BCs are numerically the same.

There can be a difference in how OpenFOAM treats these boundaries in pre- and post-processing, respectively. I.e. slip can be applied to wall-type-boundaries and the wall-only post-processing applications (wallGradU for example) can still be used.


Greetings,
Felix.
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Old   February 22, 2012, 09:15
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Anne Gerdes
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Thank you for this fast answer, Felix!
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Old   August 30, 2012, 09:07
Default boundary condition (symmetry vs periodic doubt)
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kumar
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Dear friends,
i am doing 3D wing analysis, i have doubt on boundary conditions in fluent ie both symmetry and periodic, anybody have the answer please let me know briefly,for what kind of purpose to use symmetry & periodic boundary conditions, please tell any example with problem.
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Old   April 30, 2013, 02:01
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saeideh mohamadi
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Quote:
Originally Posted by FelixL View Post
Hi, there,


the slip and symmetry BCs are numerically the same.

There can be a difference in how OpenFOAM treats these boundaries in pre- and post-processing, respectively. I.e. slip can be applied to wall-type-boundaries and the wall-only post-processing applications (wallGradU for example) can still be used.


Greetings,
Felix.
hi Felix,
would you please explain us more; about how difference OpenFOAM treats these boundaries (symmetry and slip)?
thank you very much
i have an airfoil, i set the inlet boundary velocity inlet, and the outlet boundary pressure outlet, i doubt about defining the up and down surface of my airfoil symmetry or slip?
thanks a lot again Felix.
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