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

Omer A. Alawi, Ali H. Abdelrazek, Mohammed Suleman Aldlemy, Waqar Ahmed, Omar A. Hussein, Sukaina Tuama Ghafel, Khaled Mohamed Khedher, Miklas Scholz, Zaher Mundher Yaseen

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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 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.

Original languageEnglish
Article number1979
JournalNanomaterials
Volume11
Issue number8
DOIs
Publication statusPublished - Aug 2021

Keywords

  • Concentric annuli
  • Hydrodynamic properties
  • Nanofluids
  • Nanoparticle shape
  • Turbulent mixed convection

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science

Fingerprint

Dive into the research topics of 'Heat transfer and hydrodynamic properties using different metal-oxide nanostructures in horizontal concentric annular tube: An optimization study'. Together they form a unique fingerprint.

Cite this