Numerical study of mixed convective cooling in a square cavity ventilated and partially heated from the below utilizing nanofluid

Mina Shahi*, Amir Houshang Mahmoudi, Farhad Talebi

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

105 Citations (Scopus)

Abstract

A numerical investigation of mixed convection flows through a copper-water nanofluid in a square cavity with inlet and outlet ports has been executed. The natural convection effect is attained by heating from the constant flux heat source which is symmetrical located at the bottom wall and cooling from the injected flow. The governing equations have been solved using the finite volume approach, using SIMPLE algorithm on the collocated arrangement. The study has been carried out for the Reynolds number in the range 50 ≤ Re ≤ 1000, with Richardson numbers 0 ≤ Ri ≤ 10 and for solid volume fraction 0 ≤ φ{symbol} ≤ 0.05. The thermal conductivity and effective viscosity of nanofluid have been calculated by Patel and Brinkman models, respectively. Results are presented in the form of streamlines, isotherms, average Nusselt number and average bulk temperature. In addition, the effects of solid volume fraction of nanofluids on the hydrodynamic and thermal characteristics have been investigated and discussed. The results indicate that increase in solid concentration leads to increase in the average Nusselt number at the heat source surface and decrease in the average bulk temperature.

Original languageEnglish
Pages (from-to)201-213
Number of pages13
JournalInternational Communications in Heat and Mass Transfer
Volume37
Issue number2
DOIs
Publication statusPublished - Feb 2010
Externally publishedYes

Keywords

  • Mixed convection
  • Nanofluid
  • Numerical study
  • Solid concentration
  • Square cavity

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