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Old   October 12, 2011, 05:56
Default bigger or smaller enclosure box
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Muhamad Sulaiman
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hi,
im doing analysis on a blunt body.
which one is better, using bigger or smaller enclosure box? and why?

any opinion?

cheers
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Old   October 12, 2011, 07:43
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Glenn Horrocks
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If you want to model the body moving through the open atmosphere then a big enclosure box (because it reduces proximity effects). If you want to model the body in an enclosed space like a wind tunnel then model the wind tunnel as the enclosure.
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Old   October 13, 2011, 05:46
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do size of enclosure box will affected the results?
why is that?
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Old   October 13, 2011, 06:08
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Yes it does. It is one of the basic checks you need to do for far-field simulations. When your boundaries are too close it will cause an error in the simulation by artificially constraining the flow.
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