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Heat transfer

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                     == 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:

                Q_{Conduction} = -k*A*dT/dX


     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)



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