[hebe2u.]

Thank you for your interest.

I'm trying to make a udf to produce custom post-processing variables.

When I make a new variable 'vel2' in user_post.c, what should I do to add the variable to output files.

It cause an error to add the variable 'vel2' to post.in file.
(udf_flag=1 in inputs.in, user_post_flag=1 in udf.in)

Is there something I missed?

Thank you!

[jlemoine]

For user defined variables for post-processing, CONVERGE has hardcoded user variables called user1 , user2 and so on. Those variables are set as passives and five are currently available. Here's what needs to be done:
In user_post.c = Use global_passive with user#_index to assign your own variable.
In post.in = Add the user variable name as passive to be able to view them.
If you email support@convergecfd.com, we will be able to give you an example.

[hebe2u.]

Thank you for your reply.

I think you gave me the answer I wanted, But I didn't understand your explanation.(T_T)

CONVERGE has hardcoded user variables called user1 , user2 and so on.
-> This means that I have to use "user1", "user2" and so on as a new variables in user_post.c?

Add the user variable name as passive to be able to view them.
-> So I have to add "user1", "user2" and so on in post.in?

I tried a simple calculation to double the temperature.
When I wrote in user_post.c as below, it worked well.

int user_post(void)
{

int kk;

for (kk=0; kk<tot_num_active; kk++){
global_temp[kk] = 2 * global_temp[kk];
}

return 0;

}

Use global_passive with user#_index to assign your own variable.
-> This means I should use user1_index instead of 'kk' as above?

In this code, I want to use a new variable such as user1 to store the calculated value instead of storing it in global_temp.
So I tried as below.

int user_post(void)
{

int kk;

for (kk=0; kk<tot_num_active; kk++){
user1[kk] = 2 * global_temp[kk];
}

return 0;

}


This source code fails to compile, because 'user1'(or 'global_user1') is undeclared.
When declaring user1(or global_user1) as a double type global variable, compiling succeeds, but CONVERGE solver with post.in including user1 (or global_user1) fails.

Please let me know what is wrong, what should I do.
I would appreciate your explanation.

[jlemoine]

In user_post.c the routine could look like this:
for (kk=0; kk<tot_num_active; kk++)
{
global_passive[kk*numpassive+user1_index]= your calculation
}
In post.in add under <cells>
passive(user1).
You can refer to our advanced CONVERGE training UDFs lecture on our download page (https://download.convergecfd.com/) under CONVERGE_2.3>Training_Materials>Advanced_CONVERGE_ Training>UDFs.pdf