Laminar natural convection heat transfer in an enclosure with conducting plates. Effect of Grashof number on unsteady heat transfer.

The effect of Grashof number, Gr, on two-dimensional unsteady laminar natural convection in a rectangular cell surrounded by a vertical hot wall, a vertical insulated wall, and two horizontal conducting plates has been studied numerically using the SIMPLER algorithm. For Gr ranging from 103 to 105, transient velocity and temperature distributions, and timewise variation of averaged Nusselt number on the hotwall have been compared with those for an ordinary cell which has a hot wall and three insulated walls.