NATURAL-CONVECTION IN PARTIALLY COOLED TILTED CAVITIES

Two-dimensional numerical simulations of laminar natural convection in a partially cooled, differentially heated inclined cavities are perfo rmed. One of the cavity walls is entirely heated to a uniformly high t emperature (heat source) while the opposite wall is partially cooled t o a lower temperature (heat sink). The remaining walls are adiabatic. The tilt angle of the cavity is varied from 0 degrees (heated from lef t) to - 90 degrees (heated from top). The fast false implicit transien t scheme (FITS) algorithm, developed earlier by the same authors, is m odified to solve the derived variables vorticity-streamfunction formul ation. The effects of aspect ratio (AR), sink-source ratio and tilt an gle on the average Nusselt number are examined through a parametric st udy; solutions are obtained for two Grashof numbers, 10(5) and 10(7). Flow patterns and isotherms are used to investigate the heat transfer and fluid flow mechanisms inside the cavity. (C) 1998 John Wiley & Son s, Ltd.