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Wedge (axi-symmetric BC) equation in OpenFOAM

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Old   August 9, 2016, 23:01
Smile Wedge (axi-symmetric BC) equation in OpenFOAM
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Fadhilah Mohd Sakri
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Dear Foamers,

I want to know the actual equation for the wedge in OpenFOAM.
I appreciated for everybody reply me.

Regards;

-eypa-
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Old   August 12, 2016, 10:19
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Tobias Holzmann
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Hi,

the equations we are solving are finally the same. We only use a wedge boundary condition.
If you are asking about, the mechanism behind the wedge BC, just check the boundary source file and you will get what it will do.
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Old   October 10, 2016, 17:06
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Dear Tobi,

Based on the your answer, when we use 5 degree wedge to approximate the 3D axisymmetric geometries, we still save the NS equation in cartersian (x-y-z) system, rather than the cylindrical system (x-theta-r).

I checked the boundary files for wedge boundary but did not see any information about the mechanism for this type of boundary. Could you please see more about this?

cheers,
offo

-----------------------------------------------------------------------------------------
I understand that there are two key points if we would like to use the "wedge" BC:
1 - angle < 5 degree
2 - the front and back faces straddle along one coordinate axis (along the radial direction)

Do you know why we need to meet the above reqiurements in order to approximate the axisymmetric with ""wedge"?

Thank you



Quote:
Originally Posted by Tobi View Post
Hi,

the equations we are solving are finally the same. We only use a wedge boundary condition.
If you are asking about, the mechanism behind the wedge BC, just check the boundary source file and you will get what it will do.
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