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Vorticity iso surface around propeller in CCM+

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Old   January 23, 2007, 14:53
Default Vorticity iso surface around propeller in CCM+
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Dan
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Hi, I'm trying to post process a propeller model, and want to show the extents of the propeller wake in ccm+, does anyone know how to write a field function to calculate this? Specifically I can't figure out how to calculate gradients in ccm+

Thanks,

Dan
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Old   January 23, 2007, 15:13
Default Re: Vorticity iso surface around propeller in CCM+
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Ben
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To get the gradients you need click on the solver node (segregated flow or coupled flow) and click "retain temporary storage) then step once. I wouldn't run with temporary storage retained as it uses more memory, but it will give you a load of extra field functions including strain rates, all the gradients, residuals etc. You can then calculate vorticity from the gradients....I am afraid I can't remember the formulation but I am sure that someone can give you the formula to put into a new field function..
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Old   January 23, 2007, 15:17
Default Re: Vorticity iso surface around propeller in CCM+
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Dan
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Hey Ben,

Thanks alot, that's a big help, I should be able to figure out the formulations once I get the gradients.

Cheers,

Dan
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