THERMAL SCIENCE

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Mustafa Kilic

,

Hafiz Muhammad Ali

NUMERICAL INVESTIGATION OF COMBINED EFFECT OF NANOFLUIDS AND MULTIPLE IMPINGING JETS ON HEAT TRANSFER

ABSTRACT
The present study is focused on numerical investigation of heat enhancement and fluid-flow from a heated surface by using nanofluids with three impinging jets. Effects of different volume ratio, different heat flux and different types of nanofluids (CuO-water, Al2O3-water, Cu-water, TiO-water, and pure water) on heat transfer and fluid-flow were studied numerically. The CuO-water nanofluid was used as a coolant in the other parameter. Three impinging jets were used to cool the surface. Low Reynolds number k-ε turbulent model of PHONEICS CFD code was used for numerical analysis. It is obtained that increasing volume ratio from φ=2% to 8% causes an increase of 10.4% on average Nusselt number. Increasing heat flux six times has not a significant effect on average Nusselt number. Using Cu-water nanofluid causes an increase of 2.2%, 5.1%, 4.6%, and 9.6% on average Nusselt number with respect to CuO-water, TiO-water, Al2O3-water, and pure water.
KEYWORDS
heat transfer, nanofluid, volume ratio, impinging jet
PAPER SUBMITTED: 2017-12-04
PAPER REVISED: 2018-02-05
PAPER ACCEPTED: 2018-02-20
PUBLISHED ONLINE: 2018-03-04
DOI REFERENCE: https://doi.org/10.2298/TSCI171204094K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Issue 5, PAGES [3165 - 3173]
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Numerical investigation of combined effect of nanofluids and multiple impinging jets on heat transfer

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