Numerical calculations of two-dimensional large Prandtl number convection in a box

Convection from an isolated heat source in a chamber has been previously studied numerically, experimentally and analytically. These have not covered long time spans for wide ranges of Rayleigh number Ra and Prandtl number Pr . Numerical calculations of constant viscosity convection partially fill the gap in the ranges \mathit{Ra}= 1{0}^{3} {{\unicode{x2013}}}1{0}^{6} and \mathit{Pr}= 1, 10, 100, 1000and \infty . Calculations begin with...