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GATE Mechanical Engineering (ME) 2020 Shift 1 Solved Paper

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Question : 36

Total: 65

A small metal bead (radius 0.5mm ), initially at 100∘C, when placed in a stream of fluid at 20∘C, attains a temperature of 28∘C in 35 seconds. The density and specific heat of the metal are 8500kg/m3 and 400J/kg⋅K, respectively. If the bead is considered as lumped system, the convective heat transfer coefficient (in W/mB⋅K) " between the metal bead and the fluid stream is

149.9
299.8
449.7
283.3

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