Heat transfer of swirling impinging jets with TiO2-water nanofluids

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dc.contributor.authorWongcharee, K.
dc.contributor.authorChuwattanakul, V.
dc.contributor.authorEiamsa-ard, S.
dc.date.accessioned2026-08-06T10:15:47Z
dc.date.available2026-08-06T10:15:47Z
dc.date.issued2017-01-01
dc.description.abstractAn experimental work has been carried out to study the heat transfer of swirling impinging jets (SIJs) with TiO<inf>2</inf>-water nanofluids using thermochromic liquid crystal technique. Experiments were carried out at constant jet-to-target spacing ratio (L/D) of 1.0, 2.0, 3.0 and 4.0 for Reynolds numbers from 5000 to 20,000 by using nanofluids with TiO<inf>2</inf>concentrations of 0.5%, 1.0%, 1.5%, 2.0% and 2.5% by volume, twisted tapes with twist ratios (y/W) of 4.0, 5.0, 6.0 and 7.0. Conventional impinging jets (CIJs) and swirling impinging jets (SIJs) with pure water were also tested, for comparison. At similar operation conditions, swirling impinging jets (SIJs) offer superior heat transfer to conventional impinging jets. It is also found that the nanofluids with concentrations of 0.5%, 1.0%, 1.5% and 2.0% by volume give higher Nusselt numbers than the base fluid (water) while the one with concentration of 2.5% shows opposite result. Over the studied range, the optimum condition where the maximum Nusselt number is achieved at TiO<inf>2</inf>-water nanofluids with concentration of 2.0% by volume and y/W = 6.0.
dc.identifier.citationChemical Engineering and Processing Process Intensification, 114, 16-23, 2017
dc.identifier.doi10.1016/j.cep.2017.01.004
dc.identifier.issn02552701
dc.identifier.other2-s2.0-85013141376
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/7403
dc.sourceChemical Engineering and Processing Process Intensification
dc.subjectHeat transfer
dc.subjectNanofluid
dc.subjectSwirl impinging jet
dc.subjectTwisted tape
dc.titleHeat transfer of swirling impinging jets with TiO2-water nanofluids
dc.typeArticle

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