[schwaral]

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:

 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

[AlexanderZ]

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

[schwaral]

Originally Posted by AlexanderZ

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?

[AlexanderZ]

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