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Effect of differentially heating and consequent transient behaviour for natural convection within an enclosure of sinusoidal corrugated side walls

Hasan, Muhammad Noman, Saha, Suvash C., & Gu, YuanTong (2011) Effect of differentially heating and consequent transient behaviour for natural convection within an enclosure of sinusoidal corrugated side walls. In Proceedings of the International Conference on Mechanical Engineering 2011, Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.

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Abstract

Unsteady natural convection due to differentially heating of the sinusoidal corrugated side walls of a modified square enclosure has been numerically investigated. The fluid inside the enclosure is air, initially as quiescent. The flat top and bottom surfaces are considered as adiabatic. The numerical scheme is based on the finite element method adapted to triangular non-uniform mesh element by a non-linear parametric solution algorithm. The results are obtained for the Rayleigh number, Ra ranging from 1e+05 to 1e+08 for different corrugation amplitude and frequency with constant physical properties for the fluid medium considered. The streamlines, isotherms and average Nusselt numbers are presented to observe the effect of sudden heating and its consequent transient behavior on fluid flow and heat transfer characteristics for the range of governing parameters. The present results show that the transient phenomena are greatly influenced by the variation of the aforementioned parameters.

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ID Code: 47800
Item Type: Conference Paper
Keywords: Transient Natural Convection, Sinusoidal Corrugation, Differentially Heating
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 ICME
Deposited On: 19 Dec 2011 07:47
Last Modified: 20 Dec 2011 09:55

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