Effect of sinusoidal wavy bottom surface on mixed convection heat transfer in a lid-driven cavity

Abdalla Al-Amiri, Khalil Khanafer, Joseph Bull, Ioan Pop

Research output: Contribution to journalArticlepeer-review

124 Citations (Scopus)

Abstract

The current numerical study is conducted to analyze mixed convection heat transfer in lid-driven cavity with a sinusoidal wavy bottom surface. The cavity vertical walls are insulated while the wavy bottom surface is maintained at a uniform temperature higher than the top lid. In addition, the transport equations are solved using the finite element formulation based on the Galerkin method of weighted residuals. The validity of the numerical code used is ascertained by comparing our results with previously published results. The implications of Richardson number, number of wavy surface undulation and amplitude of the wavy surface on the flow structure and heat transfer characteristics are investigated in detail while the Prandtl number is considered equal to unity. The trend of the local heat transfer is found to follow a wavy pattern. The results of this investigation illustrate that the average Nusselt number increases with an increase in both the amplitude of the wavy surface and Reynolds number. Furthermore, optimum heat transfer is achieved when the wavy surface is designated with two undulations while subjected to low Richardson numbers.

Original languageEnglish
Pages (from-to)1771-1780
Number of pages10
JournalInternational Journal of Heat and Mass Transfer
Volume50
Issue number9-10
DOIs
Publication statusPublished - May 2007

ASJC Scopus subject areas

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

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