Heatline visualization of natural convection in a trapezoidal cavity partly filled with nanofluid porous layer and partly with non-Newtonian fluid layer

A. I. Alsabery, A. J. Chamkha, S. H. Hussain, H. Saleh, Ishak Hashim

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Abstract The problem of natural convection in a trapezoidal cavity partly filled with nanofluid porous layer and partly with non-Newtonian fluid layer is visualized by heatline. Water-based nanofluids with silver or copper or alumina or titania nanoparticles are chosen for investigation. The governing equations are solved numerically using the Finite Volume Method (FVM) over a wide range of Rayleigh number (Ra=105 and 106), Darcy number (10-5 ≤ Da ≤ 10-1), nanoparticle volume fraction (0 ≤ ∅ ≤ 0.2), power-law index (0.6 ≤ n ≤ 1.4), porous layer thickness (0.3 ≤ S ≤ 0.7), the side wall inclination angle (0° ≤ ∅ ≤ 21.8°) and the inclination angle of the cavity (0° ≤ ω ≤ 90°). Explanation for the influence of various above mentioned parameters on streamlines, isotherms and overall heat transfer is provided on the basis of thermal conductivities of nanoparticles, water and porous medium. It is shown that convection increases remarkably by the addition of silver-water nanofluid and the heat transfer rate is affected by the inclination angle of the cavity variation. The results have possible applications in heat-removal and heat-storage fluid-saturated porous systems.

Original languageEnglish
Article number1025
Pages (from-to)1230-1244
Number of pages15
JournalAdvanced Powder Technology
Volume26
Issue number4
DOIs
Publication statusPublished - 1 Jul 2015

Fingerprint

Natural convection
Visualization
Nanoparticles
Silver
Fluids
Water
Heat transfer
Heat storage
Aluminum Oxide
Finite volume method
Isotherms
Porous materials
Copper
Volume fraction
Thermal conductivity
Alumina
Titanium

Keywords

  • Analytical solution
  • Heatline
  • Nanofluid
  • Natural convection
  • Porous media
  • Power-law
  • Trapezoidal cavity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

Cite this

Heatline visualization of natural convection in a trapezoidal cavity partly filled with nanofluid porous layer and partly with non-Newtonian fluid layer. / Alsabery, A. I.; Chamkha, A. J.; Hussain, S. H.; Saleh, H.; Hashim, Ishak.

In: Advanced Powder Technology, Vol. 26, No. 4, 1025, 01.07.2015, p. 1230-1244.

Research output: Contribution to journalArticle

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