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Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli

Cylinders (shapes); Finite volume method; Heat flux; Heat transfer; Mixed convection; Nanoparticles; Navier Stokes equations; Reynolds number; Volume fraction; Concentric annuli; Heat transfer characteristics; Hydraulic diameter; Nanofluids; Nanoparticle shape; Numerical results; SIMPLE algorithm; T...

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Main Authors: Alawi O.A., Sidik N.A.C., Dawood H.K.
Other Authors: 56108584300
Format: Article
Published: American Scientific Publishers 2023
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spelling my.uniten.dspace-224952023-05-29T14:01:20Z Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli Alawi O.A. Sidik N.A.C. Dawood H.K. 56108584300 57204852231 56307856100 Cylinders (shapes); Finite volume method; Heat flux; Heat transfer; Mixed convection; Nanoparticles; Navier Stokes equations; Reynolds number; Volume fraction; Concentric annuli; Heat transfer characteristics; Hydraulic diameter; Nanofluids; Nanoparticle shape; Numerical results; SIMPLE algorithm; Turbulent mixed convections; Nanofluidics Three-dimensional turbulent mixed convection flow using nanofluids in horizontal concentric annuli is numerically simulated. The continuity, Navier-Stokes and energy equations are solved using finite volume method (FVM) and the SIMPLE algorithm scheme is applied to examine the effects of turbulent flow on heat transfer characteristics. In this study, several parameters such as different types of nanoparticles (Al2O3, CuO, SiO2 and ZnO), different volume fractions in the range of 1% to 4%, different nanoparticles diameter in the range of 20 to 80 nm were used. Reynolds numbers are considered in the turbulent range of 6000 ?Re ? 18000. Different nanoparticle shapes (i.e., blades, platelets, cylindrical, bricks, and spherical), and effects of inner cylinder and outer cylinder heat fluxes were analyzed. Hydraulic diameter ratio was also examined. The numerical results indicate that the nanofluid with SiO2 has the highest Nusselt number and pressure drop compared with other nanofluids types. Heat transfer characteristic increases as the volume fraction of nanoparticles increases while it decreases as the nanoparticles diameter increases. Effects of hydraulic diameter ratio, nanoparticle shapes and location of applying heat flux on heat transfer characteristics are significant. � 2015 American Scientific Publishers All rights reserved. Final 2023-05-29T06:01:19Z 2023-05-29T06:01:19Z 2015 Article 10.1166/jctn.2015.3987 2-s2.0-84946088345 https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946088345&doi=10.1166%2fjctn.2015.3987&partnerID=40&md5=d23948e1f786786bd92dec60697dd6d6 https://irepository.uniten.edu.my/handle/123456789/22495 12 9 2067 2076 American Scientific Publishers Scopus
institution Universiti Tenaga Nasional
building UNITEN Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tenaga Nasional
content_source UNITEN Institutional Repository
url_provider http://dspace.uniten.edu.my/
description Cylinders (shapes); Finite volume method; Heat flux; Heat transfer; Mixed convection; Nanoparticles; Navier Stokes equations; Reynolds number; Volume fraction; Concentric annuli; Heat transfer characteristics; Hydraulic diameter; Nanofluids; Nanoparticle shape; Numerical results; SIMPLE algorithm; Turbulent mixed convections; Nanofluidics
author2 56108584300
author_facet 56108584300
Alawi O.A.
Sidik N.A.C.
Dawood H.K.
format Article
author Alawi O.A.
Sidik N.A.C.
Dawood H.K.
spellingShingle Alawi O.A.
Sidik N.A.C.
Dawood H.K.
Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
author_sort Alawi O.A.
title Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
title_short Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
title_full Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
title_fullStr Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
title_full_unstemmed Numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
title_sort numerical study of turbulent mixed convection of nanofluids in three-dimensional horizontal concentric annuli
publisher American Scientific Publishers
publishDate 2023
_version_ 1806428124686057472
score 13.222552

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