AN EXPERIMENTAL STUDY OF SIO2-ND HYBRID NANOFLUID: THERMAL CONDUCTIVITY, VISCOSITY AND STABILITY WITH NEW FORECAST MODELS


Yalçın G., Öztuna S., Dalkılıç A. S. , Nakkaew S., Wongwises S.

CURRENT NANOSCIENCE, vol.18, no.4, pp.520-534, 2022 (Journal Indexed in SCI Expanded)

  • Publication Type: Article / Article
  • Volume: 18 Issue: 4
  • Publication Date: 2022
  • Doi Number: 10.2174/1573413718666220111103031
  • Title of Journal : CURRENT NANOSCIENCE
  • Page Numbers: pp.520-534

Abstract

Objective: In the present investigation, thermal conductivity, and viscosity properties of water-based SiO2-ND hybrid nanofluid were measured, experimentally Methods: Nanofluids were prepared by using two-step method and with three different (0.5%, 0.75%, and 1%) concentrations. Every concentration had three different SiO2-ND mixtures (50% SiO2 - 50% ND, 33% SiO2 - 66% ND, 66% SiO2 - 33% ND). Results: The most stable sample was measured as -33.4 mV. Measurements of viscosity and thermal conductivity were done from 20 oC to 60 oC at every 10 oC. Thermal conductivity data were measured by thermal conductivity analyzer and viscosity data were measured by tube viscometer. The highest thermal conductivity enhancement was measured for 1% SiO2 0.33 : ND 0.66 at 40 oC and highest relative dynamic viscosity calculated as 4.19 for 1% SiO2 0.33 : ND 0.66 at 40 oC. A comparison table is also given to show the zeta potential values-concentration relations Conclusion: Finally, two different correlations for predicting thermal conductivity and viscosity were proposed for practical usage.