heattransfer

heattransfer - Thermal Expansion and Heat Transfer Thermal...

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Thermal Expansion and Heat Transfer Thermal Expansion A rod of length L will expand by L when its temperature increases by T. It is found L is proportional to T, L = α L T, where α is the one dimensional thermal expansion coefficient. These coefficients appear in tables and vary depending on the material. Thermal expansion is important in engineering applications--- even electrical engineers have to be aware of this phenomenon in the design of microcircuits. Heat Transfer Heat transfer falls under the category of redundant phrases. But it is part of the language, so we continue to use it. There are three modes of heat transfer. Conduction In this case, the energy transfer takes place between two points of an object (e.g. a solid) that are held at different temperatures .
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More specifically, say we have a solid cylinder of length L and cross-sectional area, A. If one end of the rod (x=0) is held at a high temperature, T H , and the other end of the rod (x=L) is held
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heattransfer - Thermal Expansion and Heat Transfer Thermal...

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