Radiant heat transfer between disks

Input(s)

A: Area of Body $\left(\mathrm{ft}^{2}\right)$

$\sigma$: Stefan-Boltzmann Constant $\left(\mathrm{BTU} / \mathrm{h} \mathrm{ft}^{2}{ }^{\circ} \mathrm{R}^{4}\right)$

F: View Factor of Body (fraction)

$T_{1}$: Initial Temperature of Emitting Body $\left({ }^{\circ} \mathrm{R}\right)$

$T_{2}$: Temperature of Absorbing Body $\left({ }^{\circ} \mathrm{R}\right)$

Output(s)

Q: Heat Transfer Rate by Radiation (BTU/h)

Formula(s)

$$ \mathrm{Q}=\mathrm{A} * \mathrm{~F} * \sigma *\left(\left(\mathrm{~T}_{1}^{4}\right)-\left(\mathrm{T}_{2}^{4}\right)\right) $$

Reference(s)

Bird, R.B., Stewart, W.E. and Lightfoot, E.N. (2002). Transport Phenomena (Second Ed.). John Wiley \& Sons, Chapter: 16, Page: 501 .