Thermal Conductivity

Written by Jerry Ratzlaff. Posted in Thermodynamics

Thermal conductivity is the ability to transfer heat within a material without any motion of the material.  Depending on the material, the transfer rate will vary.  The lower the conductivity, the slower the transfer.  The higher the conductivity, the faster the transfer.

formula

\(k  =  \frac{Ql}{A \Delta T} \)

Where:

\(k\) or \(\lambda \) (Greek symbol lambda) = thermal conductivity

\(Q \) = amount of heat transfer through a material

\(l\) = length or thickness of material

\(A\) = area of the object

\(\Delta T\) = temperature differential