Heat transfer

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Revision as of 12:40, 1 December 2005

Conduction can be defined as the heat transfer through a substance because of a temperature gradient. The rate of heat transfer by conduction between two regions of a substance is proportional to the temperature difference between them. The constant of propotionality is called thermal conductivity of the material.

$Q_{Conduction} = -k*A*\frac{dT}{dx}$

Where

$Q = \mbox{Heat conducted}\;[W]$

$k = \mbox{Thermal conductivity of the material}\;[W/m\,K]$

$A = \mbox{Cross-sectional area of the object parallel to heat conduction}\;[m^2]$

$T = \mbox{Temperature}\;[K]$

$x = \mbox{Length of the object}\;[m]$

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-	== Conduction ==	+	== Conduction ==

	*Conduction can be defined as the heat transfer through a substance because of a temperature gradient. The rate of heat transfer by conduction between two regions of a substance is proportional to the temperature difference between them. The constant of propotionality is called thermal conductivity of the material.		*Conduction can be defined as the heat transfer through a substance because of a temperature gradient. The rate of heat transfer by conduction between two regions of a substance is proportional to the temperature difference between them. The constant of propotionality is called thermal conductivity of the material.