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relative velocity of particles in DPM

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Old   May 25, 2003, 03:45
Default relative velocity of particles in DPM
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kulwinder
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Is there a way to to calculate relative velocity of the particles with respect to fluid,in the DPM model? or how does fluent6 calculates particle reynolds number?

Appreciating all suggestions and help. kulwinder
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Old   May 25, 2003, 16:13
Default Re: relative velocity of particles in DPM
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Alex Munoz
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Hi

Good question!

of course you can obtain this value, I don't know if there is already a macro implemented but you can write a UDF. See the example for define DPM scalar update.

Best regards

Alex Munoz
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Old   May 25, 2003, 19:21
Default Re: relative velocity of particles in DPM
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kulwinder
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hi alex,

Thanks for your fast and helping response. I need relative velocity at the particle position,and i have access to the fluid velocity at the nodes and cell centroid ,but then i have to interpolate this velocity to the particle position. Interpolation wil make my code long and my fluent run slow.

But I have found one macro DEFINE_DPM_DRAG where fluent passes particle Reynolds number to the macro, I will try manupulating this opportunity to my use.

Once again I appreciate your help.

Best Regards

kulwinder
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