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-   -   UDF-electric field (http://www.cfd-online.com/Forums/fluent-udf/36341-udf-electric-field.html)

Srinivas April 11, 2005 19:08

UDF-electric field
 
hi,

i want to model electric field on particles. In my case because of field particles attain constant velocity, which will be equal to electrophoretic mobility*electric field. Can any one tell me how to do it.

thanks,

Srinivas

Harish April 12, 2005 04:18

Re: UDF-electric field
 
There is an electromagnetic module available as an addon to fluent . check if it available with your fluent version. Otherwise learn how to include udf functions and you got to add the effect of the field through the udf.

-H

akbar October 10, 2011 02:51

please help me
 
can any body help me for simulate electrical field in fluent ?
please contact me with akbariakbar10@yahoo.com
thanks

rubis October 10, 2011 06:13

electric field
 
hi ,
can you activate a electric field in fluent if you use MHD model.

yours

Payam89 October 28, 2012 13:22

Fluent version
 
Hi Dear

Which version of FLUENT does have MHD addon modules ?

thanks

vsmkrm298 October 30, 2012 00:24

Hi
I dont know about the fluent modules, but i solved the similar problem.
U can get the electric field by solving the poissons equation for applied or induced potential. This u need to do by defining a udf. So, now u can take the derivative of potential to get electric field in both directions.

Payam89 October 30, 2012 03:21

thanks you very much

Do you still have your UDF to help me during my job?

many thanks

vsmkrm298 October 30, 2012 03:48

ya, i have that udf so that i can help you

liuzexiang October 31, 2012 10:37

Quote:

Originally Posted by vsmkrm298 (Post 389207)
Hi
I dont know about the fluent modules, but i solved the similar problem.
U can get the electric field by solving the poissons equation for applied or induced potential. This u need to do by defining a udf. So, now u can take the derivative of potential to get electric field in both directions.

which edition! can u supply some message?

ambrish4u November 1, 2012 07:22

@ vsmkrm298
 
:confused:for the applying mhd, which type of geometry should b prepared.....
means, is we hv to make some special geometrical part for that ?????
please help me out....thnks :confused:

vsmkrm298 November 1, 2012 07:25

i cant understand what u are asking

ambrish4u November 1, 2012 08:24

vsmkrm298
 
1 Attachment(s)
actually i have to apply electromagnetic field rectangular duct, but at a particular region....so for that i have make any different volume at that region

for example i have attached the pic....

Payam89 December 2, 2012 03:47

Quote:

Originally Posted by ambrish4u (Post 389645)
actually i have to apply electromagnetic field rectangular duct, but at a particular region....so for that i have make any different volume at that region

for example i have attached the pic....

In which part exactly do you want to apply electromagnetic field?

ambrish4u December 4, 2012 02:31

@ Payam89
 
as i hv shown in the figure, i.e. in a duct of 50 cm of length i have to apply electromagnetic field with stirring effect within 10 cm in between.

thanks.... :)

Payam89 December 4, 2012 03:00

After you active MHD panel.you should first select 2 face and then put on voltage to to each face.then you run and it will show you electric field...but if you have magnetic field it doesn't need any iteration.

ambrish4u December 11, 2012 06:39

Quote:

Originally Posted by Payam89 (Post 395608)
After you active MHD panel.you should first select 2 face and then put on voltage to to each face.then you run and it will show you electric field...but if you have magnetic field it doesn't need any iteration.

@ Payam89
thanks 4 ur reply....
since i hv to apply mhd in some area....so do i hv 2 make some geometry of that area...
because when i m applying mhd, result comes for complete area....or there is any other way for that....

Payam89 December 11, 2012 13:31

Electric Field
 
how can it understand in which area you are going to apply electric field....you should tell him!

you need to apply 2 faces:)

ambrish4u December 12, 2012 02:16

Quote:

Originally Posted by Payam89 (Post 396970)
how can it understand in which area you are going to apply electric field....you should tell him!

you need to apply 2 faces:)

@Payam89
yes u r right but it always ask only for the zone(i.e. fluid or solid).... not for any plane or wall...
thanks...


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