## Transient heating of a thermally thin vertical solid slab in air by a constant uniform radiant flux

The history of heating of a thermally thin vertical solid exposed to a uniform and constant radiant flux on one face is studied in this paper. The transient development of free convective boundary layer and reradiation from the solid surface are included in the model. Among the interesting findings are: the boundary layer growth process exhibits an 'overshoot' before reaching a steady state; the free convective Nusselt number exhibits a corresponding undershoot; reradiation plays a significant role only if the reradiant Biot number is large; the transient heat transfer results can be represented on a Nu(Gr) plot in which Galileomore »