VARIOUS COMPUTATIONAL CONDITIONS OF OSCILLATORY NATURAL-CONVECTION OF ZERO PRANDTL NUMBER FLUID IN AN OPEN BOAT HEATED AND COOLED FROM OPPOSING VERTICAL WALLS

The finite-difference computational scheme is developed for two-dimensional oscillatory natural convection of zero Prandtl number fluid in an open boat heated and cooled from opposing vertical walls. Various computational conditions are tested, such as the initial condition, time step length, finite-difference width, and finite-difference scheme. Instantaneous contour maps and velocity vectors in oscillatory states are presented in a series of maps to represent the fluctuating characteristics of two-dimensional roll cells. The physical conditions are for a boat with aspect ratio A = 3-5 at Pr = 0 and Gr = 14,000-40,000.