Topic: Heat Transfer
The convective heat transfer coefficient h is defined by the relationship (m = mass, Cp = specific heat, k = conductivity, q = heat flow rate, Nu = Nusselt Number, L = Thickness, $\Delta T$ = Temperature difference)
- A. $h=mC_{p}\Delta T$
- B. $h=\frac{k}{L}$
- C. $h=\frac{q}{\Delta T}$
- D. $h=\frac{NuK}{2L}$
Answer: C. $h=\frac{q}{\Delta T}$
Explanation: According to Newton's law of cooling, convective heat transfer for a unit area is expressed as $q = h \Delta T$. Rearranging this equation yields the definition of the convective heat transfer coefficient: $h = \frac{q}{\Delta T}$.