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Old   March 14, 2013, 03:38
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Hi,

I have a question about the function subdomain in cfx-pre. The general Momentum Source should be realised as a function on the float, but i just can realise a value or expression on this area.. Is it possible to realise the momentum source as a function? and do somebody know how?
Hope its very well described.

Thanks!
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Old   March 14, 2013, 06:30
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Glenn Horrocks
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Yes, sources can be functions. This is well described in the documentation.
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Old   March 15, 2013, 04:01
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A related question: is there a way to create a general momentum source on a point instead of a subdomain?
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Old   March 16, 2013, 06:09
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The documentation states momentum sources are not available on points. I am not sure why, but I suspect it becomes a convergence problem. So the simple work-around is to use a little volume and mesh it with a single element (which is what point source act on anyway, this is not a simplification) so you can use a normal volume source.
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Old   March 18, 2013, 02:55
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Quote:
Originally Posted by ghorrocks View Post
[...] simple work-around is to use a little volume and mesh it with a single element (which is what point source act on anyway, this is not a simplification) so you can use a normal volume source.
Yes, that's what Im doing at the moment. However, hexa meshing in icem becomes a real pain, and that's why I asked if someone knew a smart way around it.
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