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How to create a new cyclic BC

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Old   February 9, 2012, 09:01
Default How to create a new cyclic BC
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Gregory N de Boer
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Hi all,

I have been attempting to replicate the fan BC so that I can create my own derived type of cyclic BC. All has been going OK by following:

http://openfoamwiki.net/index.php/Ho...dary_condition

But I have a problem. There is no entry for fixedJumpFvPatchField.C or equivalent in $FOAM_SRC/finiteVolume/Make/files ? How can this be copied and how can it be complied in the first place without an entry here?

Any help would be very much appreciated.

Cheers,
Greg
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Old   February 9, 2012, 11:56
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Steven van Haren
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I am confused, where did you find this C-file? Why do you expect an entry for this in the Make-file?
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Old   February 9, 2012, 13:00
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The C and H files for fixedJump are found in $FOAM_SRC/finiteVolume/fields/fvPatchFields/derived/fixedJump

To create a BC I copy a similar one from $FOAM_SRC/finiteVolume/fields/fvPatchFields/... and after changing the names then look-up from $FOAM_SRC/finiteVolume/Make/files for the correct entries needed to compile it. All BC's eg fan, jumpCyclic etc have entries in here so that they can be copied yet fixedJump does not?
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Old   February 10, 2012, 08:22
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Ah ok, sorry, was looking in the wrong OF version.

fixedJump does not have an entry since it is not a boundary condition. It is just a parent-class for the fan boundary condition. It will be compiled since it is included in the fan b.c. files.

Maybe try to base your new b.c. on the fan b.c.?
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Old   February 10, 2012, 08:56
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I see, unfortunately I need to change jumpCyclic, fixedJump and fan bc so that I can get what I need. If I change fixedJump as well as fan and then include all the files when compiling fan hopefully that will work?
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Old   February 10, 2012, 09:19
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Yes, that will work. But make sure you include the updated files and not the files from the lnInclude folder.
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Old   February 10, 2012, 10:40
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Thanks, it complies and runs. All I now need to do now is change the code! Cheers, Greg
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