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Modeling a fan with a momentum source

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Old   November 20, 2002, 06:21
Default Modeling a fan with a momentum source
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Pascale Fonteijn
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Hi guys,

I would like to model the flow between two rooms induced by a fan. To reduce the complex geometry of the fan, I would like to use a momentum source. I could use a source term for only the normal velocity but then the rotational nature of the flow is completely ignored. Does any one have experience with implementing a momentum source that generates a rotational flow which is more or less comparable to the outflow of a fan...

Thank you all, Pascale.
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Old   November 20, 2002, 11:57
Default Re: Modeling a fan with a momentum source
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Holidays
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Set three momentum sources along the x and y and z directions. You could set them both as a fonction of your radius and angular location for more realism.
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Old   November 21, 2002, 17:33
Default Re: Modeling a fan with a momentum source
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Pascale Fonteijn
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Dear Holidays,

I already tried that option. I know how the desired velocities profiles look like but the translation to the momentum sources is difficult because the resulting velocities influence these sources. By trial and error you can get somewhere but I never get it right within 25%.

Pascale
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