TITLE

COMPARATIVE EVALUATION OVER THE CONVECTIVE THERMAL EFFECTS ON DEIONIZED (DI) WATER BASED Al2O3 AND TiO2 NANOFLUIDS FLOWING THROUGH A TRIANGULAR DUCT

AUTHOR(S)
PRABAKAR, K. S.; NAGARAJAN, P. K.; JAI KRISHNAN, S. SUSEEL
PUB. DATE
December 2019
SOURCE
Journal of the Balkan Tribological Association;2019, Vol. 25 Issue 4, p882
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The research work focuses on the thermal performance of 0.05, 0.1 and 0.2% volume concentrated TiO2/DI water nanofluids flowing through an equilateral triangular duct and a circular tube. The results are compared with the performance of Al2O3/DI water nanofluids under constant heat flux conditions within the Reynolds number limit between 5000 and 10000. The nanofluids were found out to be stable at pH 5 and pH 12, which was confirmed by the zeta potential values existing around ±40 mV. The nanofluids are put to thermophysical investigations and compared with existing correlations before proceeding with the convective experiments. On the basis of performance evaluation factor, the maximal value for Al2O3/DI water and TiO2/DI water nanofluids was 2.6 and 2.2 respectively, which makes it evident that the latter is not much inferior in its performance. In addition to this, it was observed that the maximum of Nusselt number of 0.2% TiO2/DI water flowing through the ducts was deficit from its use in circular tubes by 4.5%, when compared with the 13.7% deficit of Al2O3/DI water nanofluids, which showcases the better choice of using TiO2/DI water nanofluids in ducts.
ACCESSION #
141482066

 

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