[edu_aero]

16-09-2015
Taking into account my experience related with udf and DPM. I strongly recommend to use 'compiled' functions, because structures as loop(p,I->p_init) or get Ilist = Get_dpm_injections() ONLY WORK WITH COMPILED CODES!!

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Hello to everyone =)

I would like to ask you all a problem that I am facing with UDF.
It is likely that it is something quite easy. But it is the same time that I am using udf which I am struggling with it.

I am trying to implement a code in order to calculate the flow mass ratio of some droplets in the outlet. In order to do that, I want to develope a programme. However, while trying I have created some codes and all have a common same mistake, structure reference not implemented in the line where 'loop(p,I->p_init) ' is implemented.On the Internet, it seems like this loop is the way of looping through all the particles.

This is my code:

# include "udf.h"
# include "dpm.h" // However it is not neccesary, included in udf.h

DEFINE_ADJUST(TRY1, domain)
{
Particle *p;
Injection *I;
int i=0;
real sum=0;


loop(p,I->p_init)
{
i=i+1;
sum=sum+P_FLOW_RATE(p);
}

printf("P_FLOW_RATE(p)/i%s\n", sum/i);
}

I am not able even to loop through all the particles because the loop is not working.