CFD Online Discussion Forums - UDM value for stopping calculation based on convergence criteria

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UDM value for stopping calculation based on convergence criteria

Hi, I want to interrupt my calculation based on convergence criteria. My criteria should be the value I store in tthe UDM. Somehow I don't manage to store the value in the UDM with my UDF. I activate 1 UDM in fluent.

I receive an error, that is most likely becauce I use the loops not correctly.
when I just message0 the value of my criteria (fnew*fprev) in the console, everything works great. When I build in the loops and want to set the UDM to 0 or 1 it fails.

Error: Error: received a fatal signal (Segmentation fault).
Error Object: #f

UDF:

Code:

 DEFINE_ADJUST(adjust_UDS_bc, d)

{

        Thread* t;

        cell_t c;

        face_t f;

        thread_loop_c(t, d);

        {

                if ((fnew * fprev) <= 0)

                {

                        begin_c_loop(c, t)

                        {

                                C_UDMI(c, t, 0) = 1;

                        }

                        end_c_loop(c, t)

                        Message0(" UDM: %lf \n", fnew * fprev);

                }

                if ((fnew * fprev) > 0)

                {

                        begin_c_loop(c, t)

                        {

                                C_UDMI(c, t, 0) = 0;

                        }

                        end_c_loop(c, t)

                        Message0(" UDM: %lf \n", fnew* fprev);

                }

        }

}

Maybe someone has a better understanding of the loops and can help

Code:

DEFINE_ADJUST(adjust_UDS_bc, d)

{

        Thread* t;

        cell_t c;

        face_t f;

        Message0(" UDM: %lf \n", fnew * fprev);

        thread_loop_c(t, d);

        {

                begin_c_loop(c, t)

                {

                        if ((fnew * fprev) <= 0) C_UDMI(c, t, 0) = 1;

                        else C_UDMI(c, t, 0) = 0;

                }

                end_c_loop(c, t)

        }

}

fnew * fprev suppose to be defined somewhere else

Quote:

Originally Posted by AlexanderZ (Post 784431)

fnew * fprev suppose to be defined somewhere else

Yes, These two variable are defined globally and calculated in a diffrent UDF. I think that is not the problem?

did you try the code, I've attached above?