[hillator]

I try to complie the flowing code at udf file:

/**********************************************************
node motion based on simple beam deflection equation
compiled UDF
**********************************************************/
#include"udf.h"
DEFINE_GRID_MOTION(beam,domain,dt,time,dtime)
{
Thread *tf = DT_THREAD(dt);
face_t f;
Node *v;
real NV_VEC(omega), NV_VEC(axis), NV_VEC(dx);
real NV_VEC(origin), NV_VEC(rvec);
real sign_t;
int n;
 
/* set deforming flag on adjacent cell zone */
SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf));
sign_t = (26.178 * time);
 
Message ("time = %f, omega = %f\n", time, sign_t);
 
NV_S(omega, =, 0.0);
NV_D(axis, =, 0.0, 1.0, 0.0);
NV_D(origin, =, 0.0, 0.0, 0.152);
 
begin_f_loop(f,tf)
{
f_node_loop(f,tf,n)
{
v = F_NODE(f,tf,n);
/* update node if x position is greater than 0.02
and that the current node has not been previously
visited when looping through previous faces */
// if (NODE_X(v) > 0.020 && NODE_POS_NEED_UPDATE (v))
// {
/* indicate that node position has been update
so that it's not updated more than once */
NODE_POS_UPDATED(v);
omega[1] =0.1*sin(NODE_X(v)*6.28-sing_t);
 
NV_VV(rvec, =, NODE_COORD(v), -, origin);
NV_CROSS(dx, omega, rvec);
NV_S(dx, *=, dtime);
NV_V(NODE_COORD(v), +=, dx);
// }
}
}
end_f_loop(f,tf);
}

it gives the following error message: "open_udf_library:no such file or directory"
i would like to get some help

i'm using fluent 6.3
thanks hilla

[duri]

Your udf is from tutorial. Probably you might be having nmake issue. check this thread.

http://www.cfd-online.com/Forums/flu...iling-udf.html

[hillator]

there is a problem compiling at unix?

[duri]

post compiler error message to dig further

[hillator]

the pic show the grid at t=0

i try to make the botton wall to move

when i compiled the udf file the error i get:
incorrect cg motion UDF beam::libudf on zone 10 (assuming no motion)
shell conduction zones,

here is my udf code:

/**********************************************************
node motion based on simple beam deflection equation
compiled UDF
**********************************************************/
#include"udf.h"
DEFINE_GRID_MOTION(beam,domain,dt,time,dtime)
{
Thread *tf = DT_THREAD(dt);
face_t f;
Node *v;
real NV_VEC(omega), NV_VEC(axis), NV_VEC(dx);
real NV_VEC(origin), NV_VEC(rvec);
real sign;
int n;

/* set deforming flag on adjacent cell zone */
SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf));
sign =5 * time;

Message ("time = %f, omega = %f\n", time, sign);

NV_S(omega, =, 0.0);
NV_D(axis, =, 0.0, 1.0, 0.0);
NV_D(origin, =, 0.0, 0.0, 0.152);

begin_f_loop(f,tf)
{
f_node_loop(f,tf,n)
{
v = F_NODE(f,tf,n);
/* update node if x position is greater than 0.02
and that the current node has not been previously
visited when looping through previous faces */

/* indicate that node position has been update
so that it's not updated more than once */
NODE_POS_UPDATED(v);
omega[1] = 0.1*sin(6.28*NODE_X(v)-sign);
NV_VV(rvec, =, NODE_COORD(v), -, origin);
NV_CROSS(dx, omega, rvec);
NV_S(dx, *=, dtime);
NV_V(NODE_COORD(v), +=, dx);
}
}
　
end_f_loop(f,tf);
}

tanks for the help

[Sixkillers]

Originally Posted by hillator

there is a problem compiling at unix?

I am able to compile it on my Linux machine (64 bit) without problem, gcc version 4.6.2., Fluent version 12.1.4

[hillator]

attached
--------

[renatovj]

Originally Posted by hillator

the pic show the grid at t=0

i try to make the botton wall to move

when i compiled the udf file the error i get:
incorrect cg motion UDF beam::libudf on zone 10 (assuming no motion)
shell conduction zones,

here is my udf code:

/**********************************************************
node motion based on simple beam deflection equation
compiled UDF
**********************************************************/
#include"udf.h"
DEFINE_GRID_MOTION(beam,domain,dt,time,dtime)
{
Thread *tf = DT_THREAD(dt);
face_t f;
Node *v;
real NV_VEC(omega), NV_VEC(axis), NV_VEC(dx);
real NV_VEC(origin), NV_VEC(rvec);
real sign;
int n;

/* set deforming flag on adjacent cell zone */
SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf));
sign =5 * time;

Message ("time = %f, omega = %f\n", time, sign);

NV_S(omega, =, 0.0);
NV_D(axis, =, 0.0, 1.0, 0.0);
NV_D(origin, =, 0.0, 0.0, 0.152);

begin_f_loop(f,tf)
{
f_node_loop(f,tf,n)
{
v = F_NODE(f,tf,n);
/* update node if x position is greater than 0.02
and that the current node has not been previously
visited when looping through previous faces */

/* indicate that node position has been update
so that it's not updated more than once */
NODE_POS_UPDATED(v);
omega[1] = 0.1*sin(6.28*NODE_X(v)-sign);
NV_VV(rvec, =, NODE_COORD(v), -, origin);
NV_CROSS(dx, omega, rvec);
NV_S(dx, *=, dtime);
NV_V(NODE_COORD(v), +=, dx);
}
}
　
end_f_loop(f,tf);
}

tanks for the help

Dear Hillator,

Have you solved the problem of "incorrect cg motion UDF beam::libudf on zone 10 (assuming no motion)" yet?

I'm facing the same problem and have now ideia how to fix it!

Thanks in advance!