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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 0.7

ISSN Imprimer: 1940-2503
ISSN En ligne: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.v2.i6.40
pages 525-534

THE EFFECT OF VERTICAL VIBRATIONS ON NATURAL HEAT TRANSFER FROM AN ISOTHERMAL ARRAY OF CYLINDERS

Hossein Shokouhmand
University of Tehran
Seyyed Mohammad Ali Noori Rahim Abadi
School of Mechanical Engineering, College of Engineering, University of Tehran, Amir Abad Ave., Tehran, Iran; Department of Mechanical and Aeronautical Engineering, University of Pretoria, Pretoria, Private Box X20, Hatfield 0028, South Africa

RÉSUMÉ

This paper presents the fractional step algorithm using Characteristic Based Split (CBS) in ALE framework for the numerical simulation of unsteady laminar free convection heat transfer from an oscillating array of isothermal circular cylinders. The variations of flow and thermal fields are classified into a class of moving boundary problems. The moving interfaces between the fluid and cylinders have been considered. Governing equations consisting of continuity, momentum, and energy equations were solved numerically by finite element method and arbitrary Lagrangian-Eulerian kinematics description. The effects of cylinder spacing, Rayleigh number, and frequency of oscillations on the flow structures and heat transfer in the array were investigated. The results show that increments of amplitude of vibrations and Rayleigh number increase the average Nusselt number of each cylinder


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