Experimental study on preparation and base liquid effect on thermo-physical and heat transport characteristics of α-SiC nanofluids
2014 (English)In: International Communications in Heat and Mass Transfer, ISSN 0735-1933, Vol. 55, 38-44 p.Article in journal (Refereed) Published
Nanostructured solid particles dispersed in a base liquid are a new class of nano-engineeredcolloidal solutions, defined with a coined name of nanofluids (NFs). These fluids have shownpotential to enhance heat transfer characteristics of conventional base liquids utilized in heattransfer application. We recently reported on the fabrication and thermo-physical propertyevaluation of SiC NFs systems, containing SiC particles with different crystal structure. In thisstudy, our aim is to investigate the heat transfer characteristics of a particular α-SiC NF withrespect to the effect of α-SiC particle concentration and different base liquids on the thermophysicalproperties of NFs. For this purpose, a series of NFs with various α-SiC NPsconcentration of 3, 6 and 9wt% were prepared in different base liquids of distilled water (DW)and distilled water/ethylene glycol mixture (DW/EG). Their thermal conductivity (TC) andviscosity were evaluated at 20 oC. NF with DW/EG base liquid and 9wt% SiC NPs loadingexhibited the best combination of thermo-physical properties, which was therefore selected forheat transfer coefficient (HTC) evaluation. Finally, HTC tests were performed and compared indifferent criteria, including equal Reynolds number, equal mass flow rate and equal pumpingpower for a laminar flow regime. The results showed HTC enhancement of NF over the baseliquid for all evaluation criteria; 13% at equal Reynolds number, 8.5% at equal volume flow and5.5% at equal pumping power. Our findings are among the few studies in the literature where theheat transfer enhancement for the NFs over its base liquid is noticeable and based on a realistic situation.
Place, publisher, year, edition, pages
2014. Vol. 55, 38-44 p.
Nanofluids, SiC nanoparticles, Thermal conductivity, Viscosity, Heat transfer coefficient, Pumping power
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-144273DOI: 10.1016/j.icheatmasstransfer.2014.04.011ISI: 000337986600006ScopusID: 2-s2.0-84900313987OAI: oai:DiVA.org:kth-144273DiVA: diva2:712517
FunderSwedish Research Council, 2013-5647EU, European Research Council, 228882
QC 201408052014-04-152014-04-152014-08-05Bibliographically approved