Natural convection in an enclosure containing a sinusoidally heated cylindrical source

R. Roslan, H. Saleh, Ishak Hashim, A. S. Bataineh

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The problem of unsteady natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder is studied in this paper. The cylinder temperature is assumed to vary sinusoidally with time about a fixed mean temperature. The coupled momentum and energy equations have been solved numerically over a wide range of values of the amplitude and the frequency of the source temperature signal, as well as the source radius. It is found that the heat transfer rate tends to increase by oscillating the source temperature signal. The maximum heat transfer augmentation was obtained for frequency between 25π and 30π for a high amplitude and a moderate source radius.

Original languageEnglish
Pages (from-to)119-127
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume70
DOIs
Publication statusPublished - 2014

Fingerprint

enclosure
Enclosures
Natural convection
free convection
heat transfer
Temperature
radii
temperature
Heat transfer
circular cylinders
temperature gradients
Circular cylinders
momentum
Momentum
augmentation
energy

Keywords

  • Inner cylinder
  • Natural convection
  • Square enclosure

ASJC Scopus subject areas

  • Mechanical Engineering
  • Condensed Matter Physics
  • Fluid Flow and Transfer Processes

Cite this

Natural convection in an enclosure containing a sinusoidally heated cylindrical source. / Roslan, R.; Saleh, H.; Hashim, Ishak; Bataineh, A. S.

In: International Journal of Heat and Mass Transfer, Vol. 70, 2014, p. 119-127.

Research output: Contribution to journalArticle

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AB - The problem of unsteady natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder is studied in this paper. The cylinder temperature is assumed to vary sinusoidally with time about a fixed mean temperature. The coupled momentum and energy equations have been solved numerically over a wide range of values of the amplitude and the frequency of the source temperature signal, as well as the source radius. It is found that the heat transfer rate tends to increase by oscillating the source temperature signal. The maximum heat transfer augmentation was obtained for frequency between 25π and 30π for a high amplitude and a moderate source radius.

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