Question 17.4: A hollow square duct of the configuration shown (left) has i...
A hollow square duct of the configuration shown (left) has its surfaces maintained at 200 and 100 \mathrm{~K}, respectively. Determine the steady-state heat transfer rate between the hot and cold surfaces of this duct. The wall material has a thermal conductivity of 1.21 \mathrm{~W} / \mathrm{m} \cdot \mathrm{K}. We may take advantage of the eightfold symmetry of this figure to lay out the simple square grid shown below (right).
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