Upper and lower surfaces of a bus bar are convectively cooled by air at T∞ with hu ≠ h1. The sides are cooled by maintaining contact with heat sinks at To, through a thermal contact resistance of Rt,c The bar is of thermal conductivity k, and its width is twice its thickness L.

Consider steady-state conditions for which heat is uniformly generated at a volumetric rate q due to passage of an electric current. Using the energy balance method, derive finite-difference equations for nodes 1 and 13.

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T. h, 4, k 5) Ay 7. 19 10 8. 13 14 12 15 11 Re