Mechanical Engineering >> HT

Question 1 : Explain the concept of Heat Transfer

Answer : As according to second law of thermodynamics the heat always flow from higher temperature to lower temperature. So heat transfer occurs when two bodies at different temperature are brought in contact with each other (as shown in fig. 1.1) or there is a temperature difference within a body (as shown in fig. 1.2).
Driving potential for heat transfer is the temperature gradient.

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