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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 76, 2019 - Issue 7
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Original Articles

Flow patterns and heat transfer correlations in partially active cavity filled with water at its density maximum

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Pages 593-603 | Received 25 Mar 2019, Accepted 08 Jul 2019, Published online: 19 Jul 2019
 

Abstract

The work presents a numerical study of natural convection of water at its density maximum in a partially active square cavity, nine relatives locations of the partially heated/cooled zone are investigated as well as the effect of different thermal boundary conditions represented as the inversion parameter θ. Two behaviors of average Nusselt number Nuave has been detected, at θ>0.5 Top–Middle, Top–Bottom, and Middle–Bottom configurations give rise to a maximum Nuave, Conversely, at θ<0.5 Middle–Top, Bottom–Top, and Bottom–Middle configurations that take precedence. A heat transfer correlation based on a geometric parameter describing the locations of the active zone and the density inversion parameter θ is proposed.

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