Numerical simulation of three dimensional turbulent flow structure and heat transfer in ribbed-straight, divergent and convergent ducts

Amin Etminan, Zambri Harun, Ahmad Sharifian

Research output: Contribution to journalArticle

Abstract

Turbulent heat transfer and flow structure inside straight, divergent and convergent ducts with square ribs has been investigated for Reynolds number varying from 7000 to 100000 numerically. The simulations have been employed using the one and two turbulent models in particular Re-normalization group (RNG) as the most efficient model. The impact of divergence or convergence on thermal efficiency of ducts during cooling process is explored in two and three dimensional flow regimes. Results reveal that divergent channel transfers higher amount of heat in comparison to other kinds of channels. Furthermore, divergent channel records less pressure loss and higher thermal efficiency where fully developed flow can be seen just through the straight duct. Computational data show a good agreement with experimental results available in the literature.

Original languageEnglish
Pages (from-to)362-367
Number of pages6
JournalInternational Journal of Mechanics
Volume10
Publication statusPublished - 2016

Fingerprint

Flow structure
ducts
turbulent flow
Ducts
Turbulent flow
thermodynamic efficiency
heat transfer
Heat transfer
Computer simulation
turbulent heat transfer
three dimensional flow
two dimensional flow
simulation
heat transmission
Reynolds number
divergence
Cooling
cooling
heat
Hot Temperature

Keywords

  • Heat transfer enhancement
  • Numerical simulation
  • Square rib
  • Straight/convergent/divergent ducts
  • Vortex generator

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this

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abstract = "Turbulent heat transfer and flow structure inside straight, divergent and convergent ducts with square ribs has been investigated for Reynolds number varying from 7000 to 100000 numerically. The simulations have been employed using the one and two turbulent models in particular Re-normalization group (RNG) as the most efficient model. The impact of divergence or convergence on thermal efficiency of ducts during cooling process is explored in two and three dimensional flow regimes. Results reveal that divergent channel transfers higher amount of heat in comparison to other kinds of channels. Furthermore, divergent channel records less pressure loss and higher thermal efficiency where fully developed flow can be seen just through the straight duct. Computational data show a good agreement with experimental results available in the literature.",
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AU - Etminan, Amin

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AU - Sharifian, Ahmad

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N2 - Turbulent heat transfer and flow structure inside straight, divergent and convergent ducts with square ribs has been investigated for Reynolds number varying from 7000 to 100000 numerically. The simulations have been employed using the one and two turbulent models in particular Re-normalization group (RNG) as the most efficient model. The impact of divergence or convergence on thermal efficiency of ducts during cooling process is explored in two and three dimensional flow regimes. Results reveal that divergent channel transfers higher amount of heat in comparison to other kinds of channels. Furthermore, divergent channel records less pressure loss and higher thermal efficiency where fully developed flow can be seen just through the straight duct. Computational data show a good agreement with experimental results available in the literature.

AB - Turbulent heat transfer and flow structure inside straight, divergent and convergent ducts with square ribs has been investigated for Reynolds number varying from 7000 to 100000 numerically. The simulations have been employed using the one and two turbulent models in particular Re-normalization group (RNG) as the most efficient model. The impact of divergence or convergence on thermal efficiency of ducts during cooling process is explored in two and three dimensional flow regimes. Results reveal that divergent channel transfers higher amount of heat in comparison to other kinds of channels. Furthermore, divergent channel records less pressure loss and higher thermal efficiency where fully developed flow can be seen just through the straight duct. Computational data show a good agreement with experimental results available in the literature.

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