[kien]

Hi all,

I am trying to simulate the nanomagnetic fluid flowing in a flexible tube using Ansys Fluent combine with a Two-way FSI model,

However, I have a problem when I create an applied magnetic field. I use MDH to add the magnetic field in B_y (0.03 tesla). when I run the system coupling, the FSI works well but there is no applied field in Fluent even though I set the apply field after the initialization step. Ansys may set the applied field to 0 before running.

Now I am trying with UDF code but the system coupling warned error

here is my code below

#include "udf.h"

DEFINE_SOURCE(magnetic_field, c, t, dS, eqn)
{
real x[ND_ND], y[ND_ND], z[ND_ND];
real Bx, By, Bz;
real source[ND_ND];

/* Define the magnetic field values */
Bx = 0.0;
By = 0.03;
Bz = 0.0;

/* Get the cell center coordinates */
C_CENTROID(x, c, t);

/* Calculate the momentum source */
source[0] = 0.0;
source[1] = -dS[0]*By;
source[2] = 0.0;

/* Add the source to the momentum equation */
dS[eqn] = source[eqn];

return dS[eqn];
}

Do you have another way to solve this problem,

Thank you