Characterization the effects of nanofluids and heating on flow in a baffled vertical channel

Ali Assim Al-Obaidi, Ali J. Salman, Ali Raheem Yousif, Dalya H. Al-Mamoori, Mohamed H. Mussa, Tayser Sumer Gaaz, Abdul Amir H. Kadhum, Mohd S. Takriff, Ahmed A. Al-Amiery

Research output: Contribution to journalArticle

Abstract

The laminar 2-D blended convection of the nanofluids at different volume fractions has gained interest in the last decade due to an enormous application in technology. The laminar-flow stream system can be further modified by changing the geometry of the channel, adding an external heating source, and changing the initial conditions at which the stream is being influenced. The investigation of this system includes the variation of the geometrical parameters of the channel, Reynolds number, Nusselt number, and type of the nanoparticles used in preparing the nanofluid with water as the base fluid. These parameters constitute a very successful leading to utilize the numerical solutions by using a finite volume method. Regarding heat flow, one side of the channel was supplied by the heat while the temperature of the other side was kept steadily. The upstream walls of the regressive confronting step were considered as adiabatic surfaces. The nanofluids were made by adding aluminum oxide (Al2O3), copper oxide (CuO), silicon dioxide (SiO2), or zinc oxide (ZnO) nanoparticles to various volume fractions in the scope of 1 to 4% and diverse nanoparticle diameters of 25 to 80 nm. The calculations were performed with heat flux, Reynolds numbers (Re), and step height (S) at a range of 100 < < 600 W/m2, 100 < Re < 500, and 3 ≤ S ≤ 5.8, respectively. The numerical study has shown that the nanofluid with SiO2 has the highest value of the Nusselt number (Nu). The distribution area and the Nu increase as Reynolds number increases and diminish as the volume fraction diminishes with the increase of the nanoparticle diameter. The outcome of this paper has shown that assisting flow has shown superiority over the opposing flow when Nu increases.

Original languageEnglish
Article number11
JournalInternational Journal of Mechanical and Materials Engineering
Volume14
Issue number1
DOIs
Publication statusPublished - 1 Dec 2019

Fingerprint

Nanoparticles
Heating
Volume fraction
Reynolds number
Nusselt number
Zinc Oxide
Copper oxides
Aluminum Oxide
Finite volume method
Zinc oxide
Laminar flow
Silicon Dioxide
Heat flux
Silica
Heat transfer
Aluminum
Oxides
Fluids
Geometry
Water

Keywords

  • Backward-facing step
  • Blended convection
  • Channel flow
  • Nanofluids

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Al-Obaidi, A. A., Salman, A. J., Yousif, A. R., Al-Mamoori, D. H., Mussa, M. H., Gaaz, T. S., ... Al-Amiery, A. A. (2019). Characterization the effects of nanofluids and heating on flow in a baffled vertical channel. International Journal of Mechanical and Materials Engineering, 14(1), [11]. https://doi.org/10.1186/s40712-019-0105-6

Characterization the effects of nanofluids and heating on flow in a baffled vertical channel. / Al-Obaidi, Ali Assim; Salman, Ali J.; Yousif, Ali Raheem; Al-Mamoori, Dalya H.; Mussa, Mohamed H.; Gaaz, Tayser Sumer; Kadhum, Abdul Amir H.; Takriff, Mohd S.; Al-Amiery, Ahmed A.

In: International Journal of Mechanical and Materials Engineering, Vol. 14, No. 1, 11, 01.12.2019.

Research output: Contribution to journalArticle

Al-Obaidi, Ali Assim ; Salman, Ali J. ; Yousif, Ali Raheem ; Al-Mamoori, Dalya H. ; Mussa, Mohamed H. ; Gaaz, Tayser Sumer ; Kadhum, Abdul Amir H. ; Takriff, Mohd S. ; Al-Amiery, Ahmed A. / Characterization the effects of nanofluids and heating on flow in a baffled vertical channel. In: International Journal of Mechanical and Materials Engineering. 2019 ; Vol. 14, No. 1.
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