Stability and thermo-physical characteristics of EG/H2O-based nanofluid with graphene nanoplatelets for secondary coolant applications.
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| Title: | Stability and thermo-physical characteristics of EG/H |
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| Authors: | Dhayanidhi, Elango1 (AUTHOR), Selvam, Chandrasekaran1 (AUTHOR) selvamc@srmist.edu.in |
| Source: | Journal of Dispersion Science & Technology. 2026, Vol. 47 Issue 6, p1047-1059. 13p. |
| Subject Terms: | *Nanofluids, *Graphene, *Viscosity, *Equilibrium, *Thermal conductivity, *Specific heat capacity, *Solvents, *Ethylene glycol |
| Abstract: | In the present article, the thermophysical properties of an EG-H2O dispersed with GNP nanofluid are studied. The graphene nanoplatelets were dispersed in a 50:50 volume ratio (1113.2:1000 by mass in g per litre) of EG and H2O along with Gum Arabic surfactant to create the stable nanofluid dispersions by varying vol% of GNP from 0.1% to 0.5% in steps of 0.1%. The stability of proposed GNP-EG/H2O nanofluid was found using the zeta potential distribution method. A thermal properties analyzer, densitometer and rheometer were used to measure the thermal conductivity (k) (heat conduction), specific heat capacity (Cp), density (ρ) and viscosity (µ) of the nanofluid. All the properties were measured with various temperatures ranging from −15 °C to 15 °C with interval of 5 °C. The outcomes of steadiness test performed and reveal that the GNP-EG/H2O nanofluid was stable and exhibits a zeta potential distribution of −33.7 mV at 0.5 vol% of GNP. The thermal conductivity and thermal diffusivity of nanofluid enhanced by about 8.6% and 10.43% respectively when compared to the base fluid while the specific capacity decreased by 8.96% at 15 °C for 0.5 vol%. The proposed nanofluid favorable for all volume concentration under laminar flow regime while it was favorable up to 0.1% under turbulent regime which observed from the predicted effectiveness. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | In the present article, the thermophysical properties of an EG-H2O dispersed with GNP nanofluid are studied. The graphene nanoplatelets were dispersed in a 50:50 volume ratio (1113.2:1000 by mass in g per litre) of EG and H2O along with Gum Arabic surfactant to create the stable nanofluid dispersions by varying vol% of GNP from 0.1% to 0.5% in steps of 0.1%. The stability of proposed GNP-EG/H2O nanofluid was found using the zeta potential distribution method. A thermal properties analyzer, densitometer and rheometer were used to measure the thermal conductivity (k) (heat conduction), specific heat capacity (Cp), density (ρ) and viscosity (µ) of the nanofluid. All the properties were measured with various temperatures ranging from −15 °C to 15 °C with interval of 5 °C. The outcomes of steadiness test performed and reveal that the GNP-EG/H2O nanofluid was stable and exhibits a zeta potential distribution of −33.7 mV at 0.5 vol% of GNP. The thermal conductivity and thermal diffusivity of nanofluid enhanced by about 8.6% and 10.43% respectively when compared to the base fluid while the specific capacity decreased by 8.96% at 15 °C for 0.5 vol%. The proposed nanofluid favorable for all volume concentration under laminar flow regime while it was favorable up to 0.1% under turbulent regime which observed from the predicted effectiveness. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 01932691 |
| DOI: | 10.1080/01932691.2024.2430646 |
