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(Solved): (a) An insulated 1-D bar is 1 m in length. A heat transfer rate of 10 W results in a temperature dif ...



(a) An insulated 1-D bar is 1 m in length. A heat transfer rate of 10 W results in a temperature difference of

10\deg C

across the length bar. If the thermal conductivity of the bar is doubled (all other factors unchanged), what is the resulting temperature difference? (b) Laminar flow forced convection occurs across the entire span of a 1 m long plate. The resulting average heat transfer coefficient was

20(W)/(m^(2))-K

. What was the local heat transfer coefficient at the trailing edge of the 1 m long plate? (c) Convection over a flat plate produces a heat transfer coefficient of

40(W)/(m^(2))-K

when using fluid A . If the same Reynolds number is achieved for fluid B , but the thermal conductivity fluid B is double that of fluid B, what is the resulting heat transfer coefficient? (d) A copper fin is MORE EFFICIENT than a similar fin made of stainless steel if all other parameters are identical (True/False)? (e) The transient temperature response of a 10 mm diameter stainless steel sphere subjected to forced convection of

50(W)/(m^(2))-K

may be computed using lumped capacitance.

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