CFD Online Discussion Forums - DEFINE_ADJUST to patch at each time step?

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DEFINE_ADJUST to patch at each time step?

Hi all,
I have a problem with a udf (I'm not very expert).

Problem: 2D problem with 2 fluids and one solid, as in the attached picture.
Only energy is solved, no motion.
Problem is transient: total time 7200 seconds, time step: 1 second

I want to patch water at each time step with a temperature which is function of time (linear function, from 5 ˚C at time 0 s to 8 ˚C at time 7200 s).

I think I should go with the DEFINE_ADJUST macro but I don't know how to assign temperature to water domain.

Any help is appreciated.

Thank you,

Daniele

Solved, if anyone else needs it:

Code:

#include "udf.h"



DEFINE_ADJUST(my_adjust,d)

{

     cell_t c;

     Thread *t;

     real xc[ND_ND];

     real time = CURRENT_TIME;



     thread_loop_c(t,d)

     {

            begin_c_loop_all(c,t)

            {

                     C_CENTROID(xc,c,t);

                     

                     /*put here the temperature function of time such as C_T(c,t)=(3.0/7200.0*time+36000.0/7200.0)+273.15; Use if && || to define zones by system geometry to patch */



             }

             end_c_loop_all(c,t)

     }

}