inhomogeneuos heat equation!!! 1. The problem statement, all variables and given/known data ∂θ/∂t= D∇2θ + K, the mensioned equation is the heat equation for a cylindrical rod , and the requaired is to find the ordinary differential equation for θ(r) .where the radius of the rod is R , and K is constant ( correspond to a constant rate pf heat production) 2. Relevant equations 3. The attempt at a solution i use separation of variables to obtain the required for a homogeneous heat equation , but with the constant the method didn't work out. thanks for your time.