Entropy generation and natural convection in a wavy-wall cavity filled with a nanofluid and containing an inner solid cylinder

Mohammed Hussein S. Alnajem, Ammar I. Alsabery, Ishak Hashim

Research output: Contribution to journalConference article

Abstract

This work investigates the problem of entropy generation and natural convection in a wavy-wall cavity filled with a nanofluid and containing solid inner cylinder using the Galerkin finite-element method. An isothermal heat source fixed at the left vertical wall of the cavity and the horizontal walls have taken adiabatic, while the right wavy wall cooled isothermally. An Al2O3-water nanofluid fills the space between the wavy-wall cavity and the solid cylinder. To study this problem, the influence of three variables have taken into account. These variables are Rayleigh number (103 ≤ Ra ≤ 106), nanoparticle volume fraction (0 ≤ ≤ 0.04), and the number of undulations (1≤ N ≤ 4). The numerical results can be in the forms of streamlines, isotherms and local entropy generation as well as the average Nusselt number. The obtained results indicate that the effect of the nanoparticles addition on the heat transfer rate is essential for low Rayleigh number and number of undulations.

Original languageEnglish
Article number032044
JournalIOP Conference Series: Materials Science and Engineering
Volume518
Issue number3
DOIs
Publication statusPublished - 5 Jun 2019
Event2nd International Conference on Sustainable Engineering Techniques, ICSET 2019 - Baghdad, Iraq
Duration: 6 Mar 20197 Mar 2019

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Natural convection
Entropy
Nanoparticles
Nusselt number
Isotherms
Volume fraction
Heat transfer
Finite element method
Water
Hot Temperature

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

Entropy generation and natural convection in a wavy-wall cavity filled with a nanofluid and containing an inner solid cylinder. / Alnajem, Mohammed Hussein S.; Alsabery, Ammar I.; Hashim, Ishak.

In: IOP Conference Series: Materials Science and Engineering, Vol. 518, No. 3, 032044, 05.06.2019.

Research output: Contribution to journalConference article

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