Natural Convection for Air and Molten Gallium in Square- and Elbow-Shaped Enclosures

Abstract:

Natural convection flow of air and molten gallium in square and elbow-shaped enclosures is studied by a two-dimensional numerical scheme developed by the lead author. The dependence of the flow field and Nusselt number (Nu) on the Rayleigh (Ra) and Prandtl (Pr) numbers is examined in both enclosures. Results are obtained with sufficiently large Rayleigh numbers to observe transition from steady to damped or undamped oscillatory, and chaotic flow. Constant and oscillatory heat transfer rates are compared in both enclosures for air (Pr=0.71) and molten gallium (Pr=0.024).

• Periodical: Applied Mechanics and Materials (Volumes 789-790)
• Pages: 462-470
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.789-790.462
• Online since: September 2015
• Authors: Emel Evren-Selamet*, Ahmet Selamet
• Keywords: Oscillatory Flows, Transient Natural Convection

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