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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

ZnO SHAPE ON THE THERMAL CONDUCTIVITY AND VISCOSITY OF ETHYLENE GLYCOL BASED NANOFLUIDS

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.022275
pages 5435-5449

Résumé

This work focuses on the effect of filler shape on the thermal conductivity and viscosity of nanofluids. The various morphologies of Zinc oxide (ZnO) nanoparticles are prepared by using three different methods. There are nanosphere structure of ZnO-NS, flower columnar structure of ZnO-FC and twin-column like of ZnO-TC. A simple approach is developed to obtain ethylene glycol (EG) based ZnO nanofluids. The ZnO particle shape effect on the viscosity and thermal conductivity of ZnO-EG nanofluids are characterized and researched. At the packing high (10wt.%), the highest thermal conductivity of EG based nanofluids filled with ZnO-TC is 0.305Wm-1k-1, increasedby 22%. ZnO-NS with nano-sphere structure are more appropriate options as low fluid velocity, due to the high thermal conductivity of 0.302 Wm-1k-1 and lowviscosity. The characteristic of these ZnO-EG nanofliuds can provide references for the potential applications of nanofluids in the heat transfer fields.