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-   -   Lorentz force in MHD module (http://www.cfd-online.com/Forums/fluent/74539-lorentz-force-mhd-module.html)

amirbahador April 2, 2010 16:58

Lorentz force in MHD module
 
Hi freinds
On modelling the electric arc with MHD module in Fluent , Lorentz force is not loaded and momentum Eq. isn't solved as a result............Does everyone Knows about the problem ?
Best ragards

ekhilore March 2, 2011 09:25

Ansys CFD MHD module instalation
 
Hi,

I'm also trying to simulate the electric arc with ansys.
I have the v12.1 and v13 linceses but the programme tells me that I need the MHD module. Do you know how to install it?
Thanks a lot!

oghazian June 23, 2011 11:20

Lorentz force in MHD with B=0
 
hi friends,

I want to have a Lorentz force in the form of F=Eq as a source term in my momentum equations without considering any discrete phase model, the MHD module consider this force just when you have DPM and in other cases consider F=J*B which is not good for me , beacause in my case the magnetic field is zero and i just want to investigate the effect of electric field . what should I do ?

should i start to write another UDF from begining ???

thanks

ppcf August 22, 2011 03:46

I also noticed that B fiels is zero even when the solution is converged. I have applied the external B field to the fluid region. Also initialized the MHD model. Why B is still zero?

Heera Lal October 14, 2012 13:10

u first need to initialize the general fluid problem ..then initialize the mhd module then apply the field at the last .....

Payam89 October 15, 2012 12:45

MHD program
 
hello my dear!

I have a magnetic field in my flow and I read a lot of MHD tutorials but I am not able that in which format I should write this in c/c++ ....please if you have a similar c program help me.

regards

Heera Lal October 15, 2012 14:53

I am not sure for which thing u want to write the c program . If u have variable magnetic field then i think u can use import mode of field application in mhd module of fluent.

ali_mehrabi69 October 17, 2012 06:41

modeling AC magnetic field and constant current
 
hello ,
i want to simulate lorentz force that applied to mercury under AC magnetic field and a constant electric current with FLUENT,
please help me ASAP
thanks

BehzadNJ October 24, 2012 02:36

Quote:

Originally Posted by ali_mehrabi69 (Post 387065)
hello ,
i want to simulate lorentz force that applied to mercury under AC magnetic field and a constant electric current with FLUENT,
please help me ASAP
thanks

For modeling MHD , you need to use UDF files + MHD option in Ansys Fluent , ofc it's much more easier in Ansys 12 - 14

Payam89 October 27, 2012 13:57

Mhd
 
I'm going to add a electric field which has a function like E=(q/2*pi*e)(1/x) to fluent.I'm going to use c program for it.
Do you have similar program or how should I build this function?

do you have udf.h library source link?

many thanks

Payam89 October 27, 2012 13:59

mhd
 
Quote:

Originally Posted by Heera Lal (Post 386752)
I am not sure for which thing u want to write the c program . If u have variable magnetic field then i think u can use import mode of field application in mhd module of fluent.

I'm going to add a electric field which has a function like E=(q/2*pi*e)(1/x) to fluent.I'm going to use c program for it.
Do you have similar program or how should I build this function?

do you have udf.h library source link?

many thanks

Lei Gao December 1, 2014 12:02

Quote:

Originally Posted by ekhilore (Post 297643)
Hi,

I'm also trying to simulate the electric arc with ansys.
I have the v12.1 and v13 linceses but the programme tells me that I need the MHD module. Do you know how to install it?
Thanks a lot!

Hi ekhilore:
MHD is a hidden application inside the Fluent. If you already have the Fluent, you can call it from TUI order. To know more, you can search MHD tutorial.

Marya May 31, 2015 07:37

Quote:

Originally Posted by Payam89 (Post 386733)
hello my dear!

I have a magnetic field in my flow and I read a lot of MHD tutorials but I am not able that in which format I should write this in c/c++ ....please if you have a similar c program help me.

regards


May I ask you to send me MHD tutorials? I am searching for some MHD tutorials but I cant find any :confused:


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