The problem is stated here:
A homogeneous body occupying the solid region D is completely insulated. Its initial temperature is f(x). Find the steady-state temperature that it reaches after a long time. (Hint: No heat is gained or lost)
Now, it was asked many months ago:
Working with initial and boundary conditions in PDEs | MathFax.com
However, it's no longer on mathhelpforum and the solution there doesn't have the math expressions any more.
Can any one tell me how to solve it?
All I have now is:
du/dn = 0
u(x, 0) = f(x)
u_t = k*u_xx
Intuitively though, I think the solution is a constant.