Experimental Studies and Analytical Analysis of Thermophysical Properties of Ethylene Glycol–Water-Based Nanofluids Dispersed with Multi-walled Carbon Nanotubes

The present study investigates the thermal conductivity and dynamic viscosity of ethylene glycol–water solutions dispersed with oxidized multi-walled carbon nanotubes. The physico-thermal properties and Mouromtseff number (Mo) were used to evaluate the heat transfer properties of the nanofluids. Eth...

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Bibliographic Details
Published in:International journal of thermophysics 2022-12, Vol.43 (12), Article 175
Main Authors: Dosodia, Abhishek, Vadapalli, Srinivas, Jain, Amitabh Kumar, Mukkamala, Saratchandra Babu, Sanduru, Bhanu Teja
Format: Article
Language:English
Subjects:
Carbon
Classical Mechanics
Condensed Matter Physics
Data points
Dispersion
Ethylene glycol
Fluid flow
Geophysics
Heat conductivity
Heat transfer
Industrial Chemistry/Chemical Engineering
Low concentrations
Mixtures
Multi wall carbon nanotubes
Nanofluids
Physical Chemistry
Physics
Physics and Astronomy
Stability
Thermal conductivity
Thermodynamic properties
Thermodynamics
Thermophysical properties
Viscosity
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Summary:The present study investigates the thermal conductivity and dynamic viscosity of ethylene glycol–water solutions dispersed with oxidized multi-walled carbon nanotubes. The physico-thermal properties and Mouromtseff number (Mo) were used to evaluate the heat transfer properties of the nanofluids. Ethylene glycol–water mixtures were chosen as base fluids, and the volume fraction of ethylene glycol varied from 100 % to 0 % (pure water). Oxidized multi-walled carbon nanotubes in weight percentages of 0.0625, 0.125, 0.25, and 0.5 were dispersed in ethylene glycol–water mixtures to achieve the best stability. The stability of the nanofluids was monitored by UV–Vis spectroscopy for 2 months. The dispersion of multi-walled carbon nanotubes in the base fluids resulted in a significant improvement in thermal conductivity. To derive correlations for thermal conductivity and dynamic viscosity, 1 500 data points were collected for all possible combinations of temperature, weight percent of multi-walled carbon nanotubes, and ethylene glycol content. The Mouromtseff number (Mo) showed that dilute nanofluids at low concentrations are the most effective heat transfer medium in turbulent flow.
ISSN:0195-928X
1572-9567
DOI:10.1007/s10765-022-03106-w