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Old   April 17, 2001, 07:30
Default About Lorentz force
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Li San
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I plan to simulate the natural convection of aqueous solutions of sodium chloride in a cubic cell under a uniform magnetic field. Would you please give a hand to tell me how to do it using fluent? Thanks in advance.
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Old   April 19, 2001, 06:45
Default Re: About Lorentz force
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Rüdiger Schwarze
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You have two possibilities: Either You can calulate the Lorentz force directly in a user-definied subroutine or You teat the lorentz force as a user-defined scalar.
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Old   April 19, 2001, 07:11
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Li San
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Dear Rüdiger Schwarze, Thank you very much. I am a new comer. I think I should use user-defined subroutine. But I have no such kind of experiment. Could you give me a hand? How about send me a sample? Thanks in advance. Li
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Old   April 19, 2001, 09:58
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Rüdiger Schwarze
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Lorentz force density in x:

DEFINE_SOURCE(x_imp, cell, thread, dS, eqn) {

/* variables */

float jz, by, source; float x[ND_ND];

/* coordinates of cell center */

C_CENTROID(x,cell,thread);

xk = x[0];

yk = x[1];

jz = f(xk,yk); /* eddy current density, deduced from analytical formula */

by = f(xk,yk); /* magnetic flux density, deduced from analytical formula */

source = -jz*by;

dS[eqn] = 0.0;

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Old   April 19, 2001, 20:18
Default Re: About Lorentz force
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Li San
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Thanks a lot. I will try it.
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Old   October 29, 2014, 08:04
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Ganesh K C
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Quote:
Originally Posted by Rüdiger Schwarze
;96788
Lorentz force density in x:

DEFINE_SOURCE(x_imp, cell, thread, dS, eqn) {

/* variables */

float jz, by, source; float x[ND_ND];

/* coordinates of cell center */

C_CENTROID(x,cell,thread);

xk = x[0];

yk = x[1];

jz = f(xk,yk); /* eddy current density, deduced from analytical formula */

by = f(xk,yk); /* magnetic flux density, deduced from analytical formula */

source = -jz*by;

dS[eqn] = 0.0;
how to get the current density and magnetic flux terms from the analytical formula? could you please give some information on this?
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