Thermal Enhancement of Triangular Ducts Using Compound of Vortex Generators and Nanofluids

Hamdi E. Ahmed, Mohd Zamri Yusoff

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Laminar flow and heat transfer of three different types of nanofluids; Al2O3, CuO, and SiO2 suspended in ethylene glycol, in a triangular duct using delta-winglet pair of vortex generator are numerically simulated in three dimensions. The governing equations of mass, momentum and energy are solved using the finite volume method. The effects of types, concentrations, and diameter of solid nanoparticles and Reynolds number on thermal and hydraulic performance of triangular duct are examined. The range of Reynolds number, volume fraction and nanoparticles diameters is 100–1200, 1–4%, and 25–85 nm, respectively. The results indicate that the average Nusselt number increases with the particles volume fraction and Reynolds number associated with an increase in the pressure drop. The heat transfer enhancement and pressure drop penalty reduce with increasing the particles diameters. However, a reduction in the pumping power required is observed to force the nanofluids when the volume fraction increases, assuming the heat transfer coefficient remains constant.

Original languageEnglish
Pages (from-to)422-435
Number of pages14
JournalHeat Transfer Engineering
Volume39
Issue number5
DOIs
Publication statusPublished - 16 Mar 2018

Fingerprint

vortex generators
Gas generators
ducts
Ducts
Volume fraction
Reynolds number
Vortex flow
pressure drop
Pressure drop
augmentation
winglets
heat transfer
Nanoparticles
Heat transfer
nanoparticles
Ethylene Glycol
finite volume method
Finite volume method
Nusselt number
Ethylene glycol

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "Laminar flow and heat transfer of three different types of nanofluids; Al2O3, CuO, and SiO2 suspended in ethylene glycol, in a triangular duct using delta-winglet pair of vortex generator are numerically simulated in three dimensions. The governing equations of mass, momentum and energy are solved using the finite volume method. The effects of types, concentrations, and diameter of solid nanoparticles and Reynolds number on thermal and hydraulic performance of triangular duct are examined. The range of Reynolds number, volume fraction and nanoparticles diameters is 100–1200, 1–4{\%}, and 25–85 nm, respectively. The results indicate that the average Nusselt number increases with the particles volume fraction and Reynolds number associated with an increase in the pressure drop. The heat transfer enhancement and pressure drop penalty reduce with increasing the particles diameters. However, a reduction in the pumping power required is observed to force the nanofluids when the volume fraction increases, assuming the heat transfer coefficient remains constant.",
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Thermal Enhancement of Triangular Ducts Using Compound of Vortex Generators and Nanofluids. / Ahmed, Hamdi E.; Yusoff, Mohd Zamri.

In: Heat Transfer Engineering, Vol. 39, No. 5, 16.03.2018, p. 422-435.

Research output: Contribution to journalArticle

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