The Conduction of Heat Along a Composite Bar and Evaluate the Overall Heat Transfer Coefficient

Topics: Heat transfer, Heat, Temperature Pages: 3 (771 words) Published: June 11, 2011
Table of Contents
Text content Page a) Objective.................................................................................................2 b) Introduction.............................................................................................2 c) Material & Apparatus..............................................................................3 d) Procedure...............................................................................................3 e) Results & Discussion..............................................................................4 f) Conclusion..............................................................................................5 g) References..............................................................................................5

OBJECTIVE
This experiment was carried out to study the conduction of heat along a composite bar and evaluate the overall heat transfer coefficient.

INTRODUCTION
Conduction is defined as the transfer of energy from more energetic particles to adjacent less energetic particles as a result of interactions between the particles. In solids, conduction is the combined result of molecular vibrations and free electron mobility. Metals typically have high free electron mobility, which explains why they are good conductors.

Conduction can be easily understood if we imagine two blocks, one hot and the other cold. If we put these blocks in contact with one another but insulate them from the surroundings, thermal energy will be transferred from the hot block to the cold block. This mode of heat transfer between the two solid blocks is termed as ‘conduction’.

Figure 1: Schematic of a long cylindrical insulated bar
Provided that the heated, intermediate and cooled sections are clamped tightly together, so that the end faces are in good thermal contact, the three...
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