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5-24 Consider steady one-dimensional heat conduction in a plane wall with variable heat generation and variable thermal conductivity. The nodal network of the medium consists of nodes 0, 1, and 2 with a uniform nodal spacing of Ax. Using the energy balance approach, obtain the finite difference for- mulation of this problem for the case of specified heat flux do to the wall and convection at the left boundary (node 0) with a convection coefficient of h and ambient temperature of T and radiation at the right boundary (node 2) with an emissivity of & and surrounding surface temperature of T ∞0⁹ surr 90 Convection h Too 0 Ax ė(x) K(T) 1 2 T E surr Radiation
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