[esantana]

Hi!

im trying to make a transient planar model in which there is a time dependent heat flux (1.67e+17 W/m^2) during a period of time (60ns). The geometry is a rectangle and only one side has this condition. I need to study the phase change that happens to the fluid inside the domain and the effects of such. To define the heat flux I'm trying to use a user defined function but I'm not skilled at C therefore I've been reading threads for a while and have come up with what I tough was the function I needed. Fluent interprets it without errors but I a message during simulation that says:


chip-exec: heat_flux: argument 1: incorrect type (38): int expectedchip-exec: heat_flux: argument 2: incorrect type (5): pointer expectedchip-exec: heat_flux: argument 3: incorrect type (0)


(every iteration with the same and different numbers for argument and type())



and when the simulation ends if I see the results they are as if there was no heat flux at all. (The geometry is really small 5e-11m^2 so there's supposed to at least be a rise in temperature but there isn't). The code I'm using is the following:


/************************************************** *********************
heatflux.c
UDF for specyjfuing a transient heat flux boundary condition
************************************************** *********************/

#include "udf.h"
DEFINE_PROFILE(heat_flux, thread, i)

{
face_t f;
Thread *f_thread;
real t=CURRENT_TIME;
if (t<=60e-9)
{real a=1.67e+17;}
else
{real a=0;}

}



Any help would be very appreciated.