THERMAL SCIENCE
International Scientific Journal
NUMERICAL INVESTIGATION OF HEAT TRANSFER AT A RECTANGULAR CHANNEL WITH COMBINED EFFECT OF NANOFLUIDS AND SWIRLING JETS IN A VEHICLE RADIATOR
ABSTRACT
The present study is focused on the numerical investigation of heat transfer from a heated surface by using swirling jets and nanofluids. Consequences of discrete Reynolds number, inlet configuration and types of nanofluids (pure water, Al2O3- -H2O, Cu-H2O, and TiO2-H2O) were studied numerically on heat transfer and fluid-flow. As a base coolant Al2O3-H2O nanofluid was chosen for all parameters. So, a numerical analysis was done by using a k-ω turbulent model of PHOENICS CFD code. It is determined that increasing Reynolds number from Re = 12000-21000 causes an increment of 51.3% on average Nusselt Number. Using 1-jet causes an increase of 91.6% and 29.8% on average Nusselt number according to the channel flow and 2-jet. Using Cu-H2O nanofluid causes an increase of 3.6%, 7.6%, and 8.5% on the average Nusselt number with respect to TiO2-H2O, Al2O3-H2O and pure water.
KEYWORDS
PAPER SUBMITTED: 2018-08-16
PAPER REVISED: 2018-09-27
PAPER ACCEPTED: 2018-10-01
PUBLISHED ONLINE: 2018-11-04
THERMAL SCIENCE YEAR
2019, VOLUME
23, ISSUE
Issue 6, PAGES [3627 - 3637]
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