where g ·
m is the rate of heat generation per unit volume at node m. If the surface
temperatures T0 and TM are specified, the application of this equation to
each of the M 1 interior nodes results in M 1 equations for the determination
of M 1 unknown temperatures at the interior nodes. Solving these
equations simultaneously gives the temperature values at the nodes. If the
temperatures at the outer surfaces are not known, then we need to obtain two
more equations in a similar manner using the specified boundary conditions.
Then the unknown temperatures at M 1 nodes are determined by solving
the resulting system of M 1 equations in M 1 unknowns simultaneously.