[MOKRANI_A]

hello everyone
please
how i can add a function to the differential equation in openfoam, especially the scale function,

like here :

fvm::ddt(T) - (1/(1+dfra(T)*Lat/(CP*eT)))*fvm::laplacian(DT, T)
==
fvOptions(T)
i can't difinde (dfra(T))

the function what i want add it is this:
int fraction(int n);

using namespace std;

double dfra (double a)

{
double r;

if(a>-0.5 && a<+0.5)
r=1;

else
r=0;

return r;
}
Thank you