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Heat transfer of oil/MWCNT nanofluid jet injection inside a rectangular microchannel

Jalali, Esmaeil, Akbari, Omid Ali, Sarafraz, M.M., Abbas, Tehseen and Safaei, Mohammad Reza 2019, Heat transfer of oil/MWCNT nanofluid jet injection inside a rectangular microchannel, Symmetry, vol. 11, no. 6, pp. 1-20, doi: 10.3390/sym11060757.

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Title Heat transfer of oil/MWCNT nanofluid jet injection inside a rectangular microchannel
Author(s) Jalali, Esmaeil
Akbari, Omid Ali
Sarafraz, M.M.ORCID iD for Sarafraz, M.M. orcid.org/0000-0002-6347-0216
Abbas, Tehseen
Safaei, Mohammad Reza
Journal name Symmetry
Volume number 11
Issue number 6
Article ID 757
Start page 1
End page 20
Total pages 20
Publisher MDPI
Place of publication Basel, Switzerland
Publication date 2019
ISSN 2073-8994
Keyword(s) Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
Oil
MWCNT nanofluid
heat transfer
finite volume method
laminar flow
slip coefficient
microchannel
TRANSFER ENHANCEMENT
FORCED-CONVECTION
LAMINAR NANOFLUID
FLOW
SINKS
TUBE
IMPINGEMENT
PIN
RIB
Summary In the current study, laminar heat transfer and direct fluid jet injection of oil/MWCNT nanofluid were numerically investigated with a finite volume method. Both slip and no-slip boundary conditions on solid walls were used. The objective of this study was to increase the cooling performance of heated walls inside a rectangular microchannel. Reynolds numbers ranged from 10 to 50; slip coefficients were 0.0, 0.04, and 0.08; and nanoparticle volume fractions were 0–4%. The results showed that using techniques for improving heat transfer, such as fluid jet injection with low temperature and adding nanoparticles to the base fluid, allowed for good results to be obtained. By increasing jet injection, areas with eliminated boundary layers along the fluid direction spread in the domain. Dispersing solid nanoparticles in the base fluid with higher volume fractions resulted in better temperature distribution and Nusselt number. By increasing the nanoparticle volume fraction, the temperature of the heated surface penetrated to the flow centerline and the fluid temperature increased. Jet injection with higher velocity, due to its higher fluid momentum, resulted in higher Nusselt number and affected lateral areas. Fluid velocity was higher in jet areas, which diminished the effect of the boundary layer.
Language eng
DOI 10.3390/sym11060757
Indigenous content off
HERDC Research category C1.1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30142871

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.