[nguyenhoa]

Hi everybody
I am using the udf define grid motion to move the inlet boundary according to each time step (as picture shown). But during the process, the new grid is not added. I don't understand where the problem is, the wrong udf code or something else. Please help me
my udf code:
DEFINE_GRID_MOTION(girdmotion, domain, dt, time, dtime)
{
//Definitions of the Variables
face_t f;
Node *node_p;
Thread *tf = DT_THREAD (dt);
real t = CURRENT_TIME;
real a;
int n;
SET_DEFORMING_THREAD_FLAG (THREAD_T0 (tf));
//Position Update of node_p
begin_f_loop (f, tf)
{
f_node_loop (f, tf, n)
{
node_p = F_NODE (f, tf, n);
if (NODE_POS_NEED_UPDATE (node_p))
{
NODE_POS_UPDATED (node_p);
NODE_Y (node_p) = NODE_Y (node_p)+0.035*dtime;
NODE_X (node_p) = NODE_X (node_p)+0.035*dtime;
if (NODE_Y (node_p)>0.2009)
{
NODE_Y (node_p) = 0.2009;
}
if (NODE_X (node_p)>0.446)
{
NODE_X (node_p) = 0.446;
}
}
}
}
}
end_f_loop (f, tf);
}

[AlexanderZ]

what does your last (third) picture means?
why do you have code in console?

best regards

[nguyenhoa]

Originally Posted by AlexanderZ

what does your last (third) picture means?
why do you have code in console?

best regards

That is the same code as the code on console. This code is used to move the inlet as shown in Figure 2.
Please help me to solve this problem?

best regards

[AlexanderZ]

why do you have code in console?

how do you hook UDF?
step by step

best regards

[nguyenhoa]

Originally Posted by AlexanderZ

why do you have code in console?

how do you hook UDF?
step by step

best regards

sorry it is my bad, i forgot that i have written this code in console so i attacted the third image to show this code.
i compiled this udf in fluent, hook this udf in dynamic mesh/dynamic mesh zones/ user-define, and preview mesh motion i have recieved result like picture 2. in this picture, new grid was not created. I think the problem is in my code.

best regards

[Narendhiran_IIT_Madras]

Hi
Im also facing issues while interpreting the UDF code.. Im getting "parse error" for the line:Thread *tf = DT_THREAD(dt); I checked multiple times, but cant clear this error.
pls share your views on it..Thanks in advance

[AlexanderZ]

compile code