A molten aluminum alloy at \(950 \mathrm{~K}\) is poured into a cylindrical container that is well insulated from large surroundings at \(300 \mathrm{~K}\). The inner diameter of the container is \(500 \mathrm{~mm}\), and the distance from the surface of the melt to the top of the container is \(200 \mathrm{~mm}\).

If the oxidized aluminum at the surface of the melt has an emissivity of 0.55 , what is the net rate of radiation heat transfer from the melt?

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F L = 200 mm -Tsur = 300 K D=500 mm Molten metal T 950 K, & 0.55