[radin_85]

I want to write a UDF to track the interface (in VOF model) on a boundary and find the location of the interface on that boundary at each timestep. I have developed the following code:


DEFINE_EXECUTE_AT_END(Interface_tracker)
{
Domain *d;
face_t f;
FILE *fp;
d = Get_Domain(1);
int zone_ID = 6;
Thread *t = Lookup_Thread(d,zone_ID);

real FC[2];
real ti = CURRENT_TIME;
real alpha;

begin_f_loop(f,t)
{
F_CENTROID(FC,f,t);
alpha = C_VOF(f,t);
if(alpha == 0.5)
{
fprintf(fp,"f%d %g %g %g\n", ti, FC[0], FC[1]);
}
}
end_c_loop(f,t)

}


when I am interpreting it I face the following error:

Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 19: parse error.
Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 20: parse error.
Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 22: parse error.
Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 23: parse error.
Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 24: parse error.
Error: C:/Users/radin/AppData/Local/Temp/interfacetracker.txt.28068.0.c: line 26: t: undeclared variable


Can anyone tell me where is my mistake??
all the best

[pakk]

Can you tell which line is line 19 in your code?

[radin_85]

Originally Posted by pakk

Can you tell which line is line 19 in your code?

int zone_ID = 6;

[pakk]

Possible mistake: you declared a variable after assigning a variable. In older dialects of c, that is not allowed.

This is a declaration:

int zone_ID = 6;

This is an assignment:

d = Get_Domain(1);

The problem might thus be that all declarations should be done first. Try to move this assignment down (below the last declaration of alpha as real).


You would make it much easier for yourself if you would compile: you get better error messages.