5. Heat transfer studies
In this section, we examine the different modes of heat exchange, review a few models and give orders of magnitude for exchange coefficients, as well as a number of more or less empirical formulas, based on dimensional considerations, for determining these coefficients.
5.1 Different exchange modes
Heat exchange between the walls of a cylinder or tube and the gases contained therein is both convective and radiative.
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Convective exchange
A quantity of heat Q conv exchanged by convection between gases and walls is written as :
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Heat transfer studies
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