[TiagoFC]

Does anyone know how to get any of these variables from a node?

- Node Pressure
- Node Position at any given time (like, node position at previous time step, or something like that)
- Node Velocity or Node Aceleration (if this even exist, I believe it does not, but it is worth giving a try )

Thank you!

[D.M]

Hi
i dont know how much you are familiar with udf and ...
but if u want to use node datas in any udfs u should follow these steps:
1.you need to define dynamic node pointer
2.then u need too loop over the nodes of a faces or cells
3.you should access the global node datas
like:
....
Thread *t;
Node *node;
cell_t c;
int n;
real x, y;

thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
c_Node_loop(c,t,n)
{
node = C_NODE(c,t,n);
x = NODE_X(node);
y = NODE_Y(node);
......
}
end_c_loop(c,t)
}
}
i dont know if u can access the node's velocity or pressure directly but you can definitly calculate them by interpolation between face centers. but x,y and z coordinates of the nodes are accessible as described in udf.

[TiagoFC]

Thank you, I'll try this!

[gearboy]

Originally Posted by TiagoFC

Does anyone know how to get any of these variables from a node?

- Node Pressure
- Node Position at any given time (like, node position at previous time step, or something like that)
- Node Velocity or Node Aceleration (if this even exist, I believe it does not, but it is worth giving a try )

Thank you!

Domain*domain;
Thread*tc;
Node*node;
cell_t c;
int n;
real NodeP;
domain=Get_Domain(1);
Node_Function_Values(domain, "pressure");
//----------------------------------------------------------
thread_loop_c(tc,domain)
{
begin_c_loop(c,tc)
{
c_node_loop(c,tc,n)
{
node=C_NODE(c,tc,n);
NodeP=NODE_VALUE(node);
}
}
end_c_loop(c,tc)
}

[TiagoFC]

Thank you so much!!