[ramin9512]

hi
i need a fluent udf for heat generation inside a battery cell.
i wrote the udf but i get c2055 error
the code is based on cell temperature and time
Can anyone give me a solution or correct the code?
thanks

[AlexanderZ]

#include "udf.h"
#include "math.h"

DEFINE_ADJUST(cellheatgenerate,d)
{
	real SOC,ds,tm,Ri,tempu,volume,source,temp;
	Thread *t;
	cell_t c;
	tm = CURRENT_TIME;
	thread_loop_c(t,d)
	{	
		begin_c_loop(c,t)
		{		
			SOC = 1.-((90.*tm)/5400.);

			if ((SOC >= 0.) && (SOC <= 0.77))
				ds = (99.88*SOC)-76.67;
			else if ((SOC > 0.77) && (SOC <= 0.87))
				ds = -30.;
			else if ((SOC >0.87) && (SOC <=1.))
				ds = -20.;

			volume = C_VOLUME(c,t);
			tempu = C_T(c,t);
			if (tm == 0.)
				temp = 291.15;
			else if (tm > 0.)
				temp = tempu;
			
			if (temp <= 298.15)
				Ri = 0.000002258*pow(SOC,-0.3952);
			else if ((temp > 298.15) && (temp <= 308.15))
				Ri = 0.000001857*pow(SOC,-0.2787);
			else if (temp > 308.15)
				Ri = 0.000001659*pow(SOC,-0.1692);

			temp = C_T(c,t);
			source = ((Ri*8100.)-(90.*temp*ds/96.485))/volume;
			C_UDMI(c,t,0) = source;			
		}		
		end_c_loop(c,t)		
	}	
}

DEFINE_SOURCE(my_heat_source,c,t,dS,eqn)
{
	real source;
	source =  C_UDMI(c,t,0);	
	dS[eqn] = 0.0;
	return source;
}

[ramin9512]

hi dear AlexanderZ
i run the code and its compiled with no error but when i run the calculation its give me this error:
"the f1 process could not be started"
i tried parallel and serial and this error appeared
i gave constant source term and its run perfectly so problem isnt the mesh and model
please help to solve problem

[AlexanderZ]

allocate user defined memory location in fluent GUI

user defined -> memory -> set udm locations to 1