** Newtons Law of Cooling **

##### Newtons Law of Cooling

- State Newton’s law of cooling.
- Calculate rate of heat flow by convection using Newton’s law of cooling.
- Understand the governing equation relevant to natural convection.

Convection is expressed by Newton’s law of cooling as:

\[\dot{Q} = h A_{s}(T_{s} - T_{\infty}) = \rho V C_P \dfrac{dT}{dt}\]

Where h is the convection heat transfer coefficient

\( A_{s}\) is the surface area through which convection heat transfer takes place

\( T_{s}\) is the surface temperature

\( T_{\infty}\) is the temperature of the fluid sufficiently far from the surface