# Heat Conduction

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Heat transfer by conduction is one of four types of to heat transfer: mixing, conduction, convection and radiation. It is the second most efficient form of heat transfer after mixing.  It can be abbreviated by Qc. It is the flow of heat between two objects having different temperatures that are in contact with each other.

### Heat Conduction Formula

(Eq. 1) $$\large{ Q_c = \frac { k \; A \; \Delta T \; t } {d} }$$

(Eq. 2) $$\large{ Q_c = \frac { k \; A \; \left( T_h \;-\; T_c \right) \; t } {d} }$$

Where:

$$\large{ Q_c }$$ = heat transfer by conduction

$$\large{ A }$$ = area cross section

$$\large{ T_c }$$ = cooler temperature

$$\large{ T_h }$$ = higher temperature

$$\large{ \Delta T }$$ = temperature differential

$$\large{ t }$$ = time taken

$$\large{ k }$$ = thermal conductivity

$$\large{ d }$$ = thickness of the material