Numerical investigations on the heat transfer enhancement in a wavy channel using nanofluid

M. A. Ahmed, N. H. Shuaib, Mohd Zamri Yusoff

Research output: Contribution to journalArticle

70 Citations (Scopus)

Abstract

In this paper, laminar copper-water nanofluid flow and heat transfer in a two-dimensional wavy channel is numerically investigated. The Reynolds number and nanoparticle volume fraction considered are in the ranges of 100-800 and 0-5% respectively. Numerical solutions are obtained by solving the governing equation of stream function, vorticity transport and energy in curvilinear coordinates using the finite difference method. The effects of nanoparticle volume fraction, the wavy channel amplitude and wavelength and the Reynolds number on the local skin-friction coefficient, local and average Nusselt number and the heat transfer enhancement are presented and discussed. Results show that the friction coefficient and Nusselt number increase as the amplitude of wavy channel increases. As the nanoparticle volume fraction increases, the Nusselt number is found to be significantly increased, accompanied by only a slight increase in the friction coefficient. In addition, it was found that the enhancement in heat transfer mainly depends on the nanoparticle volume fraction, amplitude of the wavy wall and Reynolds number rather than the wavelength.

Original languageEnglish
Pages (from-to)5891-5898
Number of pages8
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number21-22
DOIs
Publication statusPublished - 01 Oct 2012

All Science Journal Classification (ASJC) codes

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

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