# Heat Penetration

on . Posted in Thermodynamics

Heat penetration is the depth at which heat from any heat source dissipates into a source.

## Heat penetration Formula

$$\large{ d = k \; \sqrt{ a \; t } }$$
Symbol English Metric
$$\large{ d }$$ = penetration depth $$\large{in}$$   $$\large{mm}$$
$$\large{ k }$$ = thermal conductivity $$\large{\frac{Btu-ft}{hr-ft^2-F}}$$ $$\large{\frac{W}{m-K}}$$
$$\large{ \alpha }$$ (Greek symbol alpha) = thermal diffusivity $$\large{\frac{ft^2}{sec}}$$ $$\large{\frac{m^2}{s}}$$
$$\large{ t }$$ = time $$\large{sec}$$ $$\large{s}$$