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Experimental Investigation of Dynamic Viscosity of Hybrid Nanofluid Containing MWCNT and TiO2 Using RSM Method
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Mobin Karamian *   |
| Department of Energy Conversion, Faculty of Civil Engineering, Water and Energy, Imam Hossein University,Tehran , mobinkaramian@yahoo.com |
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Abstract: (9 Views) |
In this study, the types of correlation of different models to predict the dynamic viscosity of MWCNT and TiO2 nanoparticles (40 to 60) in SAE40 base fluid by using RSM statistical method under temperature conditions of 25 to 50 degrees Celsius, volume fractions of 0.0625 to 1% and the shear rate of 665.5S-1 to 9333S-1 are investigated. Different 2Fi, Quadrat, Qubic and Quartic models are investigated in this study. These 4 different models are analyzed based on the measurement criteria. Correlation, standard deviation, coefficient of determination, reliability and P values are important parameters used to compare models. The viscosity of the nanofluid increases with the reduction of the shear rate as well as the temperature and the increase of the volume fraction. The effect of temperature in determining viscosity is more important than the changes in shear rate and solid volume fraction among these 4 models. Based on the coefficient of determination (R2=0.9994), the Quaritc model is selected as the best model.
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| Keywords: Nanofluid, viscosity, nanoparticles, volume fraction, temperature, MWCN, TiO2 |
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Type of Study: Research |
Subject:
Special
Received: 2026/08/12 | Accepted: 2026/09/22
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