Learning Forum

[vinaychandrakar11]

Hi Everyone,

I am trying to simulate the 2D (planar) domain consists of a 90-degree bend. The duct has a porous region covers the bottom and right-hand wall, and the reaction takes place in the porous region only.

This problem is from the FLUENT UDF tutorial . link for the problem is given below.

https://www.afs.enea.it/project/neptunius/docs/fluent/html/udf/node246.htm

Code for reaction rate mentioned in the tutorial is

/******************************************************************
rate.c
Compiled UDF for specifying a reaction rate in a porous medium
*******************************************************************/

#include "udf.h"

#define K1 2.0e-2
#define K2 5.

DEFINE_VR_RATE(vol_reac_rate,c,t,r,mole_weight,species_mf,rate,rr_t)
{
  real s1 = species_mf[0];
  real mw1 = mole_weight[0];

  if (FLUID_THREAD_P(t) && THREAD_VAR(t).fluid.porous)
    *rate = K1*s1/pow((1.+K2*s1),2.0)/mw1;
  else
    *rate = 0.;

  *rr_t = *rate;
}

My problem is that I am not able to compile this code and its showing error in the line shown below.

if (FLUID_THREAD_P(t) && THREAD_VAR(t).fluid.porous)

As per the problem shown in the tutorial, reaction happens only in the porous zone and above line which is showing error makes sure that its taking porous domain only. But I am not getting why its showing error in this line.

Can anyone help me with this?

Thanks in Advance.

[DrAmine]

Error message?

[vinaychandrakar11]

Its showing that "structure reference not implemented". (for "interpreted" option)
After that I tried to "compile" it but its showing below mentioned error
and when I used "built in compiler" , its showing that ud._iol.h file not found.

[vinaychandrakar11]

Hi Everyone, Problem is resolved now. There are two problems.
1) It reads only ".c" File not ".C" file.
2) I am able to compile the UDF with command prompt in my windows system. But unable to do it directly.

[DrAmine]

Try compiling a dummy Hello World UDF (DEFINE_ON_DEMAND) without reading any Fluent case file.