Abstract
Two-dimensional unsteady natural convection of a non-linear fluid represented by Criminale–Erickson–Filbey (CEF) fluid model in a square cavity is studied. The governing vorticity and energy transport equations are solved numerically. The contributions of the elastic and shear rate-dependent characteristics of the liquid to the non-Newtonian behaviour are investigated. The effect of the Weissenberg (which is a measure of the elasticity of the fluid) and Rayleigh numbers on the temperature and streamline profiles is delineated and this has been documented for the first time.
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