Entropy generation in turbulent natural convection due to internal heat generation

Sheng Chen*, Manfred Krafczyk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

In this study numerical predictions of entropy generation in turbulent natural convection due to internal heat generation in a square cavity are reported for the first time. Results of entropy generation analysis are obtained by solving the entropy generation equation. The values of velocity and temperature, which are the inputs of the entropy generation equation, are obtained by an improved thermal lattice-BGK model proposed in this paper. The analyzed range is wide, varying from the steady laminar symmetric state to the fully turbulent state. Distributions of entropy generation numbers, for various Rayleigh numbers, Prandtl numbers, and Eckert numbers, are given.
Original languageEnglish
Pages (from-to)1978-1987
Number of pages10
JournalInternational Journal of Thermal Sciences
Volume48
Issue number10
Early online date18 Mar 2009
DOIs
Publication statusPublished - Oct 2009
Externally publishedYes

Keywords

  • Entropy generation
  • Internal heat generation
  • Lattice Boltzmann method
  • Turbulent natural convection

ASJC Scopus subject areas

  • Condensed Matter Physics
  • General Engineering

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