Heat transfer
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Where | Where | ||
| + | |||
| + | Q = Heat conducted (W) | ||
k = Thermal conductivity of the material (W/m-K) | k = Thermal conductivity of the material (W/m-K) | ||
| - | A = Cross-sectional area of the object parallel to heat conduction | + | A = Cross-sectional area of the object parallel to heat conduction (m2) |
T = Temparature (K) | T = Temparature (K) | ||
| - | X = Length of the object | + | X = Length of the object (m) |
== Convection == | == Convection == | ||
Revision as of 11:04, 1 December 2005
== 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.
- Mathematically, it can be described by using the Fourier's law:
Where
Q = Heat conducted (W)
k = Thermal conductivity of the material (W/m-K)
A = Cross-sectional area of the object parallel to heat conduction (m2)
T = Temparature (K)
X = Length of the object (m)
