[UchihaMadara]

Hello all,



I am trying to print my pressure to an external file so that I could read and assign it to another inlet of a similar geometry (2D section of a pipe along its axis).


For this, C_P(f, outletthreadID) returned only static pressure, while I need the total pressure, so instead tried to create a report-definition in the setup. I found that there is a Macro (GET_REPORT_DEFINITION_VALUES in 3.8.3 of fluent customization manual) that claims to give access to "last calculated report definition values for any report defintion values created in fluent".


The problem is the code (one shown in example of 3.8.3, and below, is unable to give a result as desired).


Could someone give any pointers regarding the same?
The defined report definition in my outlet (id=7) gives total pressure of 8.2 Pa, while the below rv value returns 0.

DEFINE_ON_DEMAND(get_report)
{ 
  //const char *name = "pressure_outlet";
  int iteration = 0;
  int nrOfvalues;
  real *values;
  int *ids;
  int *index;
  int counter;
  int rv;

  rv = Get_Report_Definition_Values("pressure_outlet", 0, &nrOfvalues, NULL, NULL,NULL);
  if (rv==0 && nrOfvalues)
  {
    Message("Report definition evaluated at iteration has %d values\n", nrOfvalues);
  
    values = (real*) malloc(sizeof(real)* nrOfvalues);
    ids = (int*) malloc(sizeof(int)* nrOfvalues);
  
  rv = Get_Report_Definition_Values("pressure_outlet", 0, NULL, values, ids, &index);
  
    Message("Values correspond to iteration index:%d\n", index);
  
  for (counter = 0; counter < nrOfvalues; counter++)
    {
      Message("report definition values: %d, %f\n", ids[counter], values[counter]);
    }
  free(values);
  free(ids);
  }
  else
  {
     /*The command can be unsuccessful if the report definition does not exist or if it has not been evaluated yet.*/
     if (rv == 1)
     {
         Message(" %s does not exist\n", "pressure_outlet");
     }
     else if ( nrOfvalues == 0 )
     {    
         Message(" %s not evaluated at iteration level\n", "pressure_outlet");
         Message("rv value is: %g \n", rv);
     }
  }
  Message("report def is: %g\n", rv);
}

[Yasser]

rv is an integer and it returns a 0 when successful.

What about values[0] ?

[UchihaMadara]

I have defined a report and after executing on demand, everytime the message printed is that of the last elseif condition.

[pakk]

Does the name of your report definition exactly match the name in the UDF?

[UchihaMadara]

Checked.
Yes it does.

[Yasser]

Are you running steady simulation?

[UchihaMadara]

yes indeed.
Would have taken the transient example given after the above in the manual, if I was doing that, which I am not.

[Yasser]

As you go to the last else if, the function finds the report definition and it doesn't find any values calculated. So, can you check that your report do actually calculate the desired value?

[UchihaMadara]

Thank you for your pointing that out Yasser.


As it turns out, apart from creating a "Report Definition" in the Gui, I should have also created the "Report-plot" while creating the report definition. Hence the udf going to the else-if condition at the end.



I'd also like to argue, that this is fairly an important point that is missing out from the manual, don't you think?



After this, I could see the results on the console.....phew!!!

[Yasser]

Good it works!!
Thanks for sharing the reason!

I agree with you, the manual should point this