[pakk]

Not an error per se, but something that could be simplified:

if ( t <= 100.0 )
{
F_PROFILE(f,thread,position) = 379.48 + 0.0004*t;
}
else if (100.0 < t && t <= 180.0 )
...

At the second 'if', you already know that t>100.0, otherwise you would have been in the first 'if'. So you can simplify your code:

if ( t <= 100.0 )
{
F_PROFILE(f,thread,position) = 379.48 + 0.0004*t;
}
else if (t <= 180.0)
...

And so on for the other 'if's. In this way you don't have to repeat the number, so you are less likely to accidentally type the wrong number.

For the rest: you should tell us if there are errors, or if the udf does not do what you want. We can not guess that.

[mmunige]

Thank you so much for your help.
there is no error uptill now. further i can check when simulations proceed further. as i am modelling 3d with very fine mesh, so its very slow simulation.

Regards

[pakk]

If you want to test this UDF quickly, you can consider to use a smaller mesh.