Co3O4 ethylene glycol-based nanofluids: Thermal conductivity, viscosity and high pressure density

Mariano, Alejandra; Pastoriza-Gallego, María José; Lugo, Luis; Mussari, Lelia; Piñeiro, Manuel M.

doi:10.1016/j.ijheatmasstransfer.2015.01.061

Cited by 106 publications

(39 citation statements)

References 51 publications

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“…It was presented that it is possible to model an increase of the viscosity by using modified K-D model (7) a second degree polynomial (12). It has been shown that the enhancement of thermal conductivity can be modeled also by using a second degree polynomial (20), and the classical models of thermal conductivity do not describe the MgO-EG nanofluids correctly. Comparison of MgO-EG nanofluids with pure ethylene glycol from the point of view of the benefits for applications in laminar and turbulent flows exhibits that nanofluid with 0.052 volume fraction of particles presents the best heat transfer capabilities.…”

Section: Discussionmentioning

confidence: 99%

“…The increase in thermal conductivity of nanofluids containing various types of nanoparticles was intensively studied [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. However, when planning the practical use of nanofluids, it should be taken into account that with increasing concentration of the nanoparticles in a liquid its viscosity increases [19,20,26].…”

Section: Introductionmentioning

confidence: 99%

“…However, when planning the practical use of nanofluids, it should be taken into account that with increasing concentration of the nanoparticles in a liquid its viscosity increases [19,20,26]. In some cases, an increase in viscosity may also be associated with a change of liquid from Newtonian to non-Newtonian [27][28][29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Viscosity and thermal conductivity of MgO–EG nanofluids

Żyła

2017

J Therm Anal Calorim

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Nanofluids are a group of novel engineering materials that are increasingly being used, particularly in the processes of heat exchange. One of the most promising materials in this group is magnesium oxide-ethylene glycol (MgO-EG) nanofluid. The literature informs that this material is characterized by an significant increase in thermal conductivity with low dynamic viscosity increase. The aim of this paper is to provide experimental data on the dynamic viscosity and thermal conductivity of nanofluids containing MgO nanoparticles with 20 nm average size and ethylene glycol as base fluid. To determine dynamic viscosity and thermal conductivity of samples, a HAAKE MARS 2 rheometer (Thermo Electron Corporation, Karlsruhe, Germany) and KD2 Pro Thermal Properties Analyzer (Decagon Devices Inc., Pullman, Washington, USA) were used. Additionally, a comparison of the experimental results and the predictions of theoretical models was presented. It was presented that the vast majority of theoretical models does not describe in a correct way both viscosity and thermal conductivity. It was also shown that the enhancement of this basic physical properties might be described with good result with second degree polynomials. Finally, evaluation of the heat transfer performance was presented.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Viscosity and thermal conductivity of MgO–EG nanofluids

Żyła

2017

J Therm Anal Calorim

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“…In Pastoriza-Gallego et al [28,29] study, the Newtonian behaviour of Al2O3/EG and ZnO/EG was obvious. Also, Żyła [30] and Mariano et al [31] investigated the viscosity of Y3Al5O12/EG and Co3O4/EG, respectively. Their results indicated that their nanofluids were Newtonian.…”

Section: Introductionmentioning

confidence: 99%

The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-ethylene Glycol Nanofluids

Esfe

2017

Period. Polytech. Chem. Eng.

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“…It has been shown in many papers that, depending on the type of nanoparticles and the base fluid, some nanofluids can have a Newtonian [38][39][40][41][42][43] or non-Newtonian [44][45][46][47][48][49][50][51] nature. The mechanisms of these rheological properties are still not fully understood.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties of Boron Nitride-Ethylene Glycol (BN-EG) Nanofluids

Fal

Cholewa

Gizowska

et al. 2016

Journal of Elec Materi

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This paper presents the results of experimental investigation of the dielectric properties of ethylene glycol (EG) with various load of boron nitride (BN) nanoparticles. The nanofuids were prepared by using a two-step method on the basis of commercially available BN nanoparticles. The measurements were carried out using the Concept 80 System (NOVOCONTROL Technologies GmbH & Co. KG, Montabaur, Germany) in a frequency range from 10 Hz to 10 MHz and temperatures from 278.15 K to 328.15 K. The frequency-dependent real (e 0 ) and imaginary (e 00 ) parts of the complex permittivity (e Ã ) and the alternating current (AC) conductivity are presented. Also, the effect of temperature and mass concentrations on the dielectric properties of BN-EG nanofluids are demonstrated. The results show that the most significant increase can be achieved for 20 wt.% of BN nanoparticles at 283.15 K and 288.15 K, that is eleven times larger than in the case of pure EG.

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Co3O4 ethylene glycol-based nanofluids: Thermal conductivity, viscosity and high pressure density

Cited by 106 publications

References 51 publications

Viscosity and thermal conductivity of MgO–EG nanofluids

Viscosity and thermal conductivity of MgO–EG nanofluids

The Investigation of Effects of Temperature and Nanoparticles Volume Fraction on the Viscosity of Copper Oxide-ethylene Glycol Nanofluids

Dielectric Properties of Boron Nitride-Ethylene Glycol (BN-EG) Nanofluids

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