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Heat transfer and hydrodynamic properties using different metal-oxide nanostructures in horizontal concentric annular tube : An optimization study

Alawi, Omer A. ; Abdelrazek, Ali H. ; Aldlemy, Mohammed Suleman ; Ahmed, Waqar ; Hussein, Omar A. ; Ghafel, Sukaina Tuama ; Khedher, Khaled Mohamed ; Scholz, Miklas LU and Yaseen, Zaher Mundher (2021) In Nanomaterials 11(8).
Abstract

Numerical studies were performed to estimate the heat transfer and hydrodynamic properties of a forced convection turbulent flow using three-dimensional horizontal concentric annuli. This paper applied the standard k–ε turbulence model for the flow range 1 × 104 ≤ Re ≥ 24 × 103. A wide range of parameters like different nanomaterials (Al2O3, CuO, SiO2 and ZnO), different particle nanoshapes (spherical, cylindrical, blades, platelets and bricks), different heat flux ratio (HFR) (0, 0.5, 1 and 2) and different aspect ratios (AR) (1.5, 2, 2.5 and 3) were examined. Also, the effect of inner cylinder rotation was discussed. An experiment was conducted out using a field-emission scanning electron microscope (FE-SEM) to... (More)

Numerical studies were performed to estimate the heat transfer and hydrodynamic properties of a forced convection turbulent flow using three-dimensional horizontal concentric annuli. This paper applied the standard k–ε turbulence model for the flow range 1 × 104 ≤ Re ≥ 24 × 103. A wide range of parameters like different nanomaterials (Al2O3, CuO, SiO2 and ZnO), different particle nanoshapes (spherical, cylindrical, blades, platelets and bricks), different heat flux ratio (HFR) (0, 0.5, 1 and 2) and different aspect ratios (AR) (1.5, 2, 2.5 and 3) were examined. Also, the effect of inner cylinder rotation was discussed. An experiment was conducted out using a field-emission scanning electron microscope (FE-SEM) to characterize metallic oxides in spherical morphologies. Nano-platelet particles showed the best enhancements in heat transfer properties, followed by nano-cylinders, nano-bricks, nano-blades, and nano-spheres. The maximum heat transfer enhancement was found in SiO2, followed by ZnO, CuO, and Al2O3, in that order. Meanwhile, the effect of the HFR parameter was insignificant. At Re = 24,000, the inner wall rotation enhanced the heat transfer about 47.94%, 43.03%, 42.06% and 39.79% for SiO2, ZnO, CuO and Al2O3, respectively. Moreover, the AR of 2.5 presented the higher heat transfer improvement followed by 3, 2, and 1.5.

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author
; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Concentric annuli, Hydrodynamic properties, Nanofluids, Nanoparticle shape, Turbulent mixed convection
in
Nanomaterials
volume
11
issue
8
article number
1979
publisher
MDPI AG
external identifiers
  • pmid:34443809
  • scopus:85111418969
ISSN
2079-4991
DOI
10.3390/nano11081979
language
English
LU publication?
yes
id
840cf549-90a4-4f68-ace4-1c70490d47f6
date added to LUP
2021-08-27 16:11:51
date last changed
2025-01-13 12:12:15
@article{840cf549-90a4-4f68-ace4-1c70490d47f6,
  abstract     = {{<p>Numerical studies were performed to estimate the heat transfer and hydrodynamic properties of a forced convection turbulent flow using three-dimensional horizontal concentric annuli. This paper applied the standard k–ε turbulence model for the flow range 1 × 10<sup>4</sup> ≤ Re ≥ 24 × 10<sup>3</sup>. A wide range of parameters like different nanomaterials (Al2O3, CuO, SiO2 and ZnO), different particle nanoshapes (spherical, cylindrical, blades, platelets and bricks), different heat flux ratio (HFR) (0, 0.5, 1 and 2) and different aspect ratios (AR) (1.5, 2, 2.5 and 3) were examined. Also, the effect of inner cylinder rotation was discussed. An experiment was conducted out using a field-emission scanning electron microscope (FE-SEM) to characterize metallic oxides in spherical morphologies. Nano-platelet particles showed the best enhancements in heat transfer properties, followed by nano-cylinders, nano-bricks, nano-blades, and nano-spheres. The maximum heat transfer enhancement was found in SiO2, followed by ZnO, CuO, and Al2O3, in that order. Meanwhile, the effect of the HFR parameter was insignificant. At Re = 24,000, the inner wall rotation enhanced the heat transfer about 47.94%, 43.03%, 42.06% and 39.79% for SiO2, ZnO, CuO and Al2O3, respectively. Moreover, the AR of 2.5 presented the higher heat transfer improvement followed by 3, 2, and 1.5.</p>}},
  author       = {{Alawi, Omer A. and Abdelrazek, Ali H. and Aldlemy, Mohammed Suleman and Ahmed, Waqar and Hussein, Omar A. and Ghafel, Sukaina Tuama and Khedher, Khaled Mohamed and Scholz, Miklas and Yaseen, Zaher Mundher}},
  issn         = {{2079-4991}},
  keywords     = {{Concentric annuli; Hydrodynamic properties; Nanofluids; Nanoparticle shape; Turbulent mixed convection}},
  language     = {{eng}},
  number       = {{8}},
  publisher    = {{MDPI AG}},
  series       = {{Nanomaterials}},
  title        = {{Heat transfer and hydrodynamic properties using different metal-oxide nanostructures in horizontal concentric annular tube : An optimization study}},
  url          = {{http://dx.doi.org/10.3390/nano11081979}},
  doi          = {{10.3390/nano11081979}},
  volume       = {{11}},
  year         = {{2021}},
}