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Old   July 31, 2002, 15:00
Default electrostatic force-UDF ?
  #1
Zhenan
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Hi

Has anybody done modeling taking into account the electrostatic force on charged particles using UDF?
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Old   August 1, 2002, 02:24
Default Re: electrostatic force-UDF ?
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Lanre
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The magnitude of the electrostatic force is F_sub_E= qE, where E is the magnitude of the electric field and q is the charge on the particle. The electric field strength must be known. You can set constant or use a UDF to compute or apply a variable electric field.

See http://www.fluentusers.com/fluent6/d...dpm-body-force for a similar example with a magnetic force
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Old   August 11, 2002, 20:58
Default Re: electrostatic force-UDF ?
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Alamgir
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Zhenan,

I'm also modelling taking into account the electrostatic force on charged particles using UDF, I'm at the very starting point. Zhenan, could you tell me which equation u r using?

Alamgir
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Old   August 12, 2002, 09:33
Default Re: electrostatic force-UDF ?
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zhenan li
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Hi,

Thanks for your replying.

I am using UDF to modeling the Powder Coating System. This is my first time to add electrostatic field and add electric force to charged particles.

I added the field using UDS, and want to add the force with UDF.

The equation is F = E*Q. Currently I am thinking of the constant Q, and to add this in the function. E will be from the user defined scalar.

If it answers your question?

Thanks,
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Old   August 12, 2002, 20:06
Default Re: electrostatic force-UDF ?
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Alamgir
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Thanks for your reply. I'm modelling the particle tracking in drinking water with very low volume fraction. Do you count double layer effect on your modelling?

Alamgir
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Old   August 13, 2002, 08:31
Default Re: electrostatic force-UDF ?
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zhenan li
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Hi;

My model is simple one. I do not consider that effect.
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