Consider steady two-dimensional heat transfer in an
L-shaped solid body whose cross section is given in the figure.
The thermal conductivity of the body is k 45 W/m · °C, and
heat is generated in the body at a rate of g· 5 106 W/m3
The right surface of the body is insulated, and the bottom surface
is maintained at a uniform temperature of 120°C. The
entire top surface is subjected to convection with ambient air
at T 30°C with a heat transfer coefficient of h 55
W/m2 · °C, and the left surface is subjected to heat flux at a uniform
rate of q·
L 8000 W/m2. The nodal network of the problem
consists of 13 equally spaced nodes with x y
1.5 cm. Five of the nodes are at the bottom surface and thus
their temperatures are known. (a) Obtain the finite difference
equations at the remaining eight nodes and (b) determine the
nodal temperatures by solving those equations.