Abstract
Laminar steady-state natural convection in a two-dimensional rectangular open cavity is investigated numerically. Isotherms and streamline plots are obtained in a shallow open cavity with aspect ratio of 0.143 for Rayleigh numbers up to 10 6 using constant properties and Boussinesq approximations, by imposing approximate boundary conditions at the opening. This method has been tested and compared to cases where computations are carried out into an enlarged external domain. Results show that outgoing flow patterns and the heat transfer results are governed by strong characteristics of the heated cavity. These findings compare favorably with experimental results for Ra = 10 6.
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