Author(s)

Ramon L. Frederick

Abstract

Natural convection of air in a cubical enclosure of edge L with a cold wall covering one of the vertical surfaces and a hot square sector of side s centred on the opposite wall is considered The overall heat transfer shows similar dependancies to the case of side heated cavities for s/L > 0.5. llie main circulation cell is similar to that in the test problem, but becomes progressively distorted by expansions, contractions and secondary loops at high Ra and at low values of s/L It is shown that the average fluid temperature can be used as a criterion for transition to a convective regime. 1 Introduction Natural convection in enclosures is a very active area of research. Numerical work in this area continues to use of two-dimensional solu

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