Air flows over a heated plate at a velocity of 50 m/s. The local skin friction...
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Air flows over a heated plate at a velocity of 50 m/s. The local skin friction coefficient at a point on a plate is 0.004. The following properties for air are, density = 0.88 kg/m³, viscosity = 2.286 × 105 kg-m/s, specific heat = 1.001 kJ/kg K, thermal conductivity of air= 0.035 W/mK and use St. Pr¹/³ = Cfx/2. 1/3 The local heat transfer coefficient is (a) 11.69 W/m² K (b) 116.9 W/m² K (c) 58.45 W/m² K (d) 29.225 W/m² K The average heat transfer per unit area if the temperature difference is 60° C and the flow is assumed to be laminar (a) 701.4 W/m² (c) 7014 W/m³ (b) 1402.8 W/m³ (d) 14028 W/m² Air flows over a heated plate at a velocity of 50 m/s. The local skin friction coefficient at a point on a plate is 0.004. The following properties for air are, density = 0.88 kg/m³, viscosity = 2.286 × 105 kg-m/s, specific heat = 1.001 kJ/kg K, thermal conductivity of air= 0.035 W/mK and use St. Pr¹/³ = Cfx/2. 1/3 The local heat transfer coefficient is (a) 11.69 W/m² K (b) 116.9 W/m² K (c) 58.45 W/m² K (d) 29.225 W/m² K The average heat transfer per unit area if the temperature difference is 60° C and the flow is assumed to be laminar (a) 701.4 W/m² (c) 7014 W/m³ (b) 1402.8 W/m³ (d) 14028 W/m²
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Related Book For
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
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