Consider a composite wall, which has one linearly varying cross-sectional area as shown in Figure 4.16. Determine the heat flow and interfacial temperatures. Thickness \(=10 \mathrm{~cm}, k_{A}=200 \mathrm{~W} / \mathrm{m}^{\circ} \mathrm{C}, k_{B}=20 \mathrm{~W} / \mathrm{m}^{\circ} \mathrm{C}\) and \(k_{C}=40 \mathrm{~W} / \mathrm{m}^{\circ} \mathrm{C}\). Assume top and bottom surfaces are insulated.

Transcribed Image Text:

120C A B 5 cm 1 cm 5 cm 1 cm 10 cm -20C