Effects of temperature and concentration on thermophysical properties of TiO2-MWCNTs -doped graphene nanoﬂuids

Zetty Akhtar, Abdul Malek and Md Mustafizur, Rahman and Kadirgama, Kumaran and Saidur, Rahman and Wahaizad, Safiei (2021) Effects of temperature and concentration on thermophysical properties of TiO2-MWCNTs -doped graphene nanoﬂuids. In: 2nd International Conference on Innovative Technology and Sciences, iCITES 2020 , 22 December 2020 , Chennai, India. pp. 920-925., 48 (4). ISSN 2214-7853

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DOI/Official URL: https://doi.org/10.1016/j.matpr.2021.03.725

Abstract

This paper presents to investigate the effects of temperature and concentration on thermophysical properties of titanium dioxide (TiO2) nanofluids containing multi-walled carbon nanotubes (MWCNTs)-doped graphene. In this present study, the ethylene glycol-based hybrids TiO2-MWCNTs and MWCNTs-doped 10 wt per cent graphene nanofluids were prepared five concentrations (0.02 to 0.10 per cent) using a two-step, direct-mixing methods. The effect of the temperature, concentration and type of nanofluid and its interaction with TiO2-MWCNTs and MWCNTs' thermal conductivity and viscosity has been studied using a central composite design technique. The significance of the analytical, statistical model being developed is validated using variance analysis. Twenty-four experiments were conducted to develop second-order polynomial equations for target outputs. Based on the results obtained, the predicted values were insensible in agreement with the experimental data. More than 85 per cent of thermal conductivity and viscosity variations of nanofluids can be predicted by models that convey the applied model's precision. The expected optimised value shown in the optimisation plot is 0.6035 W/°C for thermal conductivity and 14.673 mPa/s for viscosity. The desirable parameters such as temperature, concentration and nanofluid type are 30 °C, 0.06 per cent and TiO2-MWCNT, respectively. The validation with the experimental result indicates that the model can reasonably predict the optimal experimental conditions. Viscosity decreases due to an increase in temperature and concentration. It demonstrates the effect of concentration and temperature on viscosity.

Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Indexed by Scopus
Uncontrolled Keywords:	Concentration; Multi-walled carbon nanotubes; Temperature; Thermal conductivity; Titanium dioxide-multi walled carbon nanotubes; Viscosity
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TJ Mechanical engineering and machinery
Faculty/Division:	Institute of Postgraduate Studies Centre of Excellence: Automotive Engineering Centre Centre of Excellence: Automotive Engineering Centre College of Engineering
Depositing User:	Mr Muhamad Firdaus Janih@Jaini
Date Deposited:	21 Feb 2023 03:11
Last Modified:	02 Nov 2023 05:32
URI:	http://umpir.ump.edu.my/id/eprint/35579
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