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A flat plates surface tempertures are initially at 120 deg C and 60 deg C with...

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Mechanical Engineering

A flat plates surface tempertures are initially at 120 deg C and60 deg C with one surfaces temperature being lower due to air at 20deg C flowing over it with a velocity of 2m/s having a heattransfer coefficient of 30 W/m ^2K. The themal conductivities ofthe sheet metal and air are 35 W/m K. and 0.0262 W/mK.respectively.

Without following the problem solving guide answer the followingquestion providing detaied justifications:

A. What are the modes of heat transfer?

B. Is this a time dependent or steady state problem? Why or whynot?

C. The themal conductivities in the sheet metal and air aresignificantly different. Recalling the definition of thermalconductivity, What can you conclude about the materials abilitys totransfer heat?

D. How would the heat transfer in the system differ if thecooling was through natural convection? Explain your reasoning.

E. Draw a schematic of the energy flow?

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