Numerical analysis of nanofluids in differentially heated enclosure undergoing orthogonal rotation

H. Saleh, I. Hashim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Natural convection heat transfer in a rotating, differentially heated enclosure is studied numerically in this paper. The rotating enclosure is filled with water-Ag, water-Cu, water-Al2O3, or water-TiO 2 nanofluids. The governing equations are in velocity, pressure, and temperature formulation and solved using the staggered grid arrangement together with MAC method. The governing parameters considered are the solid volume fraction, 0. 0 ≤ φ ≤ 0. 05, and the rotational speeds, 3. 5 ≤ Ω ≤ 17. 5 rpm, and the centrifugal force is smaller than the Coriolis force and both forces were kept below the buoyancy force. It is found that the angular locations of the local maximums heat transfer were sensitive to rotational speeds and nanoparticles concentration. The global quantity of heat transfer rate increases about 1.5%, 1.1%, 0.8%, and 0.6% by increasing 1% φ of the nanoparticles Ag, Cu, Al2O3, and TiO2, respectively, for the considered rotational speeds.

Original languageEnglish
Article number874132
JournalAdvances in Mathematical Physics
Volume2014
DOIs
Publication statusPublished - 2014

Fingerprint

Nanofluid
Enclosure
enclosure
Enclosures
numerical analysis
Numerical analysis
Numerical Analysis
Water
Heat Transfer
heat transfer
Heat transfer
water
Nanoparticles
Rotating
Coriolis force
Coriolis Force
Centrifugal Force
Staggered Grid
nanoparticles
centrifugal force

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Applied Mathematics

Cite this

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abstract = "Natural convection heat transfer in a rotating, differentially heated enclosure is studied numerically in this paper. The rotating enclosure is filled with water-Ag, water-Cu, water-Al2O3, or water-TiO 2 nanofluids. The governing equations are in velocity, pressure, and temperature formulation and solved using the staggered grid arrangement together with MAC method. The governing parameters considered are the solid volume fraction, 0. 0 ≤ φ ≤ 0. 05, and the rotational speeds, 3. 5 ≤ Ω ≤ 17. 5 rpm, and the centrifugal force is smaller than the Coriolis force and both forces were kept below the buoyancy force. It is found that the angular locations of the local maximums heat transfer were sensitive to rotational speeds and nanoparticles concentration. The global quantity of heat transfer rate increases about 1.5{\%}, 1.1{\%}, 0.8{\%}, and 0.6{\%} by increasing 1{\%} φ of the nanoparticles Ag, Cu, Al2O3, and TiO2, respectively, for the considered rotational speeds.",
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