Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids

R. Roslan, H. Saleh, Ishak Hashim

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Convective heat transfer in a differentially heated square enclosure with an inner rotating cylinder is studied theoretically. The free space between the cylinder and the enclosure walls is filled with water- Ag, water-Cu, water-Al 2O 3 or water-TiO 2 nanofluids. The governing equations are formulated for velocity, pressure and temperature formulation and are modeled in COMSOL, a partial differential equation (PDE) solver based on the Galerkin finite element method (GFEM). The governing parameters considered are the solid volume fraction, 0.0 ≤ φ ≤ 0.05, the cylinder radius, 0 ≤ ω ≤ 0.3 and the angular rotational velocity, -1000 ≤ ω ≤ 1000. The results are presented to show the effect of these parameters on the heat transfer and fluid flow characteristics. It is found that the strength of the flow circulation is much stronger for a higher nanoparticle concentration, a better thermal conductivity value and a smaller cylinder with a faster, negative rotation. The maximum heat transfer are obtained at a high nanoparticle concentration with a good conductivity value, a slow positive rotation and a moderate cylinder size located in the center of the enclosure.

Original languageEnglish
Pages (from-to)7247-7256
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number23-24
DOIs
Publication statusPublished - Nov 2012

Fingerprint

rotating cylinders
Engine cylinders
enclosure
Enclosures
heat transfer
Heat transfer
Water
water
Nanoparticles
nanoparticles
convective heat transfer
flow characteristics
partial differential equations
Partial differential equations
fluid flow
Flow of fluids
Volume fraction
Thermal conductivity
finite element method
thermal conductivity

Keywords

  • Mixed convection
  • Nanofluids
  • Rotating cylinder

ASJC Scopus subject areas

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

Cite this

Effect of rotating cylinder on heat transfer in a square enclosure filled with nanofluids. / Roslan, R.; Saleh, H.; Hashim, Ishak.

In: International Journal of Heat and Mass Transfer, Vol. 55, No. 23-24, 11.2012, p. 7247-7256.

Research output: Contribution to journalArticle

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