Thermal Conductivity

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Thermal Conductivity

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.

Thermal Conductivity formula

\(\large{ k  =  \frac{Ql}{A \Delta T} }\)        

Where:

\(\large{ k }\) or \(\large{ \lambda }\)   (Greek symbol lambda) = thermal conductivity

\(\large{ \alpha }\)   (Greek symbol alpha) = thermal diffusity (heat transfer rate)

\(\large{ A }\) = area of the object

\(\large{ l }\) = length or thickness of material

\(\large{ \rho }\)   (Greek symbol rho) = density

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

\(\large{ \Delta T }\) = temperature differential

 

 

 

 

Tags: Equations for Thermal