Experiment on forced convective heat transfer enhancement using MWCNTs/GNPs hybrid nanofluid and mini-tube

Ahmed A. Hussien, Mohd Z. Abdullah, Nadiahnor Md Yusop, Moh'd A. Al-Nimr, Muataz Atieh, Mohammad Mehrali

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The development of new classes of fluids with enhanced heat transfer capabilities has been the subject of significant contemporary research. One area of interest in this field involves the use of nanomaterials to improve the properties of heat-transfer fluids. This research experimentally investigates promising hybrid nanofluids that contain graphene nanoplatelets (GNPs) and multi-walled carbon nanotubes (MWCNTs). The present article reports thermophysical properties, heat transfer coefficient, and pressure drop for MWCNTs/GNPs water based hybrid nanofluids that flow through a circular tube (Din = 1.1 mm). The flow was assumed as a fully laminar flow (Re = 200–500), and a uniform heat flux was applied to the tube surface. Different weight concentrations of MWCNTs/water nanofluids (0.075, 0.125, and 0.25 wt%) were used and mixed with (0.035 wt%) GNPs to prepare hybrid nanofluids. Heat transfer coefficient was significantly enhanced using MWCNTs and MWCNTs/GNPs hybrid nanofluids. The enhancement of heat transfer coefficient is found to be proportionally dependent on the nanoparticle concentrations and inversely related with the Reynolds number. The positive effect of adding GNPs to different concentrations of MWCNTs enhanced the heat transfer coefficient. The maximum enhancement was recorded for 0.25 MWCNTs/0.035 GNPs hybrid at Re = 200 for a 43.4% increase with an 11% rise in pressure drop.

Original languageEnglish
Pages (from-to)1121-1131
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume115
DOIs
Publication statusPublished - 1 Jan 2017

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Carbon Nanotubes
Graphite
convective heat transfer
Graphene
Carbon nanotubes
graphene
carbon nanotubes
tubes
Heat transfer
augmentation
heat transfer coefficients
Heat transfer coefficients
Experiments
pressure drop
Pressure drop
heat transfer
circular tubes
Fluids
Water
fluids

Keywords

  • GNPs
  • Heat transfer coefficient
  • Hybrid nanofluids
  • Mini-tube
  • MWCNTs
  • Thermal conductivity
  • Viscosity

ASJC Scopus subject areas

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

Cite this

Experiment on forced convective heat transfer enhancement using MWCNTs/GNPs hybrid nanofluid and mini-tube. / Hussien, Ahmed A.; Abdullah, Mohd Z.; Yusop, Nadiahnor Md; Al-Nimr, Moh'd A.; Atieh, Muataz; Mehrali, Mohammad.

In: International Journal of Heat and Mass Transfer, Vol. 115, 01.01.2017, p. 1121-1131.

Research output: Contribution to journalArticle

Hussien, Ahmed A. ; Abdullah, Mohd Z. ; Yusop, Nadiahnor Md ; Al-Nimr, Moh'd A. ; Atieh, Muataz ; Mehrali, Mohammad. / Experiment on forced convective heat transfer enhancement using MWCNTs/GNPs hybrid nanofluid and mini-tube. In: International Journal of Heat and Mass Transfer. 2017 ; Vol. 115. pp. 1121-1131.
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