Natural convection from a cylinder in square porous enclosure filled with nanofluids

H. Saleh, Ishak Hashim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The problem of natural convection induced by a temperature difference between an outer porous enclosure and an inner circular cylinder is studied in this paper. The fluid in the porous enclosure is a water-based nanofluids containing Ag, Cu, Al<inf>2</inf>O<inf>3</inf>, or TiO<inf>2</inf> nanoparticles. The coupled momentum and energy equations have been solved numerically over a wide range of values of the solid volume fraction, the Rayleigh number, the cylinder radius, and various temperature conditions of the bottom wall. It is found that there exists an optimum cylinder radius, below which the increasing cylinder radius increases the strength of flow circulation and above which the cylinder radius decreases the strength of flow circulation. The heat transfer rate increases linearly by increasing the nanoparticles concentration for all cylinder radius and Rayleigh number.

Original languageEnglish
Pages (from-to)559-567
Number of pages9
JournalJournal of Porous Media
Volume18
Issue number6
DOIs
Publication statusPublished - 2015

Fingerprint

Nanofluid
Natural Convection
Enclosure
enclosure
Enclosures
Natural convection
free convection
Radius
Nanoparticles
radii
Circular cylinders
Rayleigh number
Volume fraction
Momentum
Heat transfer
Temperature
Fluids
Water
nanoparticles
TiO2

Keywords

  • Darcy's law
  • Nanofluids
  • Natural convection

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Modelling and Simulation
  • Biomedical Engineering

Cite this

Natural convection from a cylinder in square porous enclosure filled with nanofluids. / Saleh, H.; Hashim, Ishak.

In: Journal of Porous Media, Vol. 18, No. 6, 2015, p. 559-567.

Research output: Contribution to journalArticle

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