Unsteady convection heat transfer for a porous square cylinder varying cylinder-to-channel height ratio

Shiang Wuu Perng, Horng-Wen Wu, Ren Hung Wang, Tswen Chyuan Jue

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The unsteady laminar flow and forced convection heat transfer have been numerically investigated across the porous square cylinder with the heated cylinder bottom at the axis in the channel changing cylinder-to-channel height ratio of 10%, 30%, and 50%. The other parameters include Reynolds number (50∼250), Darcy number (10-6∼10-2), and porosity (0.4∼0.8). The pressure drops are also examined for the flow past the porous square cylinder in the channels for all cases. The results indicate that the heat transfer for the square porous cylinder is enhanced as cylinder-to-channel height ratio increases; in particular, the enhancement is more obvious for a higher Darcy number and porosity.

Original languageEnglish
Pages (from-to)2006-2015
Number of pages10
JournalInternational Journal of Thermal Sciences
Volume50
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1

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Heat convection
convection
Porosity
heat transfer
Heat transfer
Forced convection
Engine cylinders
Laminar flow
Pressure drop
Reynolds number
porosity
forced convection
pressure drop
laminar flow
augmentation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)

Cite this

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title = "Unsteady convection heat transfer for a porous square cylinder varying cylinder-to-channel height ratio",
abstract = "The unsteady laminar flow and forced convection heat transfer have been numerically investigated across the porous square cylinder with the heated cylinder bottom at the axis in the channel changing cylinder-to-channel height ratio of 10{\%}, 30{\%}, and 50{\%}. The other parameters include Reynolds number (50∼250), Darcy number (10-6∼10-2), and porosity (0.4∼0.8). The pressure drops are also examined for the flow past the porous square cylinder in the channels for all cases. The results indicate that the heat transfer for the square porous cylinder is enhanced as cylinder-to-channel height ratio increases; in particular, the enhancement is more obvious for a higher Darcy number and porosity.",
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Unsteady convection heat transfer for a porous square cylinder varying cylinder-to-channel height ratio. / Perng, Shiang Wuu; Wu, Horng-Wen; Wang, Ren Hung; Jue, Tswen Chyuan.

In: International Journal of Thermal Sciences, Vol. 50, No. 10, 01.10.2011, p. 2006-2015.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Unsteady convection heat transfer for a porous square cylinder varying cylinder-to-channel height ratio

AU - Perng, Shiang Wuu

AU - Wu, Horng-Wen

AU - Wang, Ren Hung

AU - Jue, Tswen Chyuan

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AB - The unsteady laminar flow and forced convection heat transfer have been numerically investigated across the porous square cylinder with the heated cylinder bottom at the axis in the channel changing cylinder-to-channel height ratio of 10%, 30%, and 50%. The other parameters include Reynolds number (50∼250), Darcy number (10-6∼10-2), and porosity (0.4∼0.8). The pressure drops are also examined for the flow past the porous square cylinder in the channels for all cases. The results indicate that the heat transfer for the square porous cylinder is enhanced as cylinder-to-channel height ratio increases; in particular, the enhancement is more obvious for a higher Darcy number and porosity.

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