Abstract
The addition of surfactants has been proven to enhance stability in hybrid nanofluids which have shown promising potential in heat transfer applications due to their magnificent thermal conductivity relative to the base fluid and mono-based nanofluids. In this study, the impact of adding surfactant on the stability, thermophysical and wettability properties of Aluminium doped zinc oxide (AZO) hybrid nanofluids is experimentally investigated for the volume concentration ranging from 0.05 to 0.15 vol.% prepared by a two-step technique. Gum Arabic was added as a surfactant to base fluid with different nanoparticles to surfactant ratios (1:0.5, 1:1). The optimum surfactant concentration ratio of 1:0.5 provided the maximum thermal conductivity improvement for 0.15 vol. % of aluminium doped zinc oxide hybrid nanofluid. From zeta potential analysis, the surfactant exhibited remarkable stability for up to one week. The contact angle and surface tension were increased subject to the increment in concentration of nanoparticles up to 1:0.5 of surfactant addition. In conclusion, adding a minimal amount of surfactant can enhance hybrid nanofluids' stability and thermophysical properties.
| Original language | English |
|---|---|
| Pages (from-to) | 1165-1172 |
| Number of pages | 8 |
| Journal | Proceedings of the Thermal and Fluids Engineering Summer Conference |
| Volume | 2022-May |
| Publication status | Published - 2022 |
| Externally published | Yes |
| Event | 7th Thermal and Fluids Engineering Conference, TFEC 2022 - Las Vegas, United States Duration: May 15 2022 → May 18 2022 |
Keywords
- Hybrid nanofluids
- Nanofluids
- Stability
- Surfactant
- Thermal conductivity
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Mechanical Engineering
- Fluid Flow and Transfer Processes
- Electrical and Electronic Engineering
