Unsteady natural convection within a porous enclosure of sinusoidal corrugated side walls

Sojoudi, Atta, Saha, Suvash C., Khezerloo, Marzieh, & Gu, Y. T. (2014) Unsteady natural convection within a porous enclosure of sinusoidal corrugated side walls. Transport in Porous Media, 104(3), pp. 537-552.

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Numerically investigation of free convection within a porous cavity with differential heating has been performed using modified corrugated side walls. Sinusoidal hot left and cold right walls are assumed to receive sudden differentially heating where top and bottom walls are insulated. Air is considered as working fluid and is quiescent, initially. Numerical experiments reveal 3 distinct stages of developing pattern including initial stage, oscillatory intermediate and finally steady state condition. Implicit Finite Volume Method with TDMA solver is used to solve the governing equations. This study has been performed for the Rayleigh numbers ranging from 100 to 10,000. Outcomes have been reported in terms of isotherms, streamline, velocity and temperature plots and average Nusselt number for various Ra, corrugation frequency and corrugation amplitude. The effects of sudden differential heating and its resultant transient behavior on fluid flow and heat transfer characteristics have been shown for the range of governing parameters. The present results show that the transient phenomena are enormously influenced by the variation of the Rayleigh Number with corrugation amplitude and frequency.

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ID Code: 71944
Item Type: Journal Article
Refereed: Yes
Keywords: Natural convection, transient behavior, differentially heating, Porous enclosure, Sinusoidal corrugation
DOI: 10.1007/s11242-014-0347-y
ISSN: 1573-1634
Subjects: Australian and New Zealand Standard Research Classification > MATHEMATICAL SCIENCES (010000) > NUMERICAL AND COMPUTATIONAL MATHEMATICS (010300) > Numerical Solution of Differential and Integral Equations (010302)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > MECHANICAL ENGINEERING (091300) > Numerical Modelling and Mechanical Characterisation (091307)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 Springer Verlag
Deposited On: 21 May 2014 22:16
Last Modified: 03 Jan 2015 12:09

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