[vkumar12]

I have a problem where a mass source term is dependent on the temperature of the adjacent cells. The equation which i want to put in the udf form is given like this:

Smj = (A * ▲ Tj)/ Vj

Where Smj = Mass source of a species in jth cell
A - constant
▲ Tj - Temperature diff between two adjacent cells
Vj - Volume of Jth cell

I think i understand the basic udf, and I dont know how do i put temperature of two adjacent cells in the udf. If any one help writing a UDF , i would be very grateful

I am trying to write but stuck, It may be simple for those who are experienced in this.

DEFINE_SOURCE(_mass, c, t, dS, eqn)
{
real source;
real temp = C_T(c,t);
if (673<=C_T(c,t)<=1073)
source = -----------------------???
else
source = 0;
dS[eqn] = 0;
return source;
}

Thanks
Varun