Applications of Nanofluids

Sheremet, Mikhail A.

doi:10.3390/nano11071716

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…Choi and Eastman [1] coined the term "nanofluid", which is nanoparticles dispersed in conventional liquids, such as water and ethylene glycol, forming a new type of fluid used for heat transfer enhancement and produced through a suspension of nanometer-sized particles. Nanofluids were introduced in the second half of the 1900s, following the need to increase the efficiency of many devices used to exchange heat, but also in the civil, aerospace, and medical fields [2][3][4]. Lee et al [5] published one of the first experimental papers on nanofluids and studied the improvement in thermal conductivity of water/copper oxide, water/alumina and glycol/alumina.…”

Section: Introductionmentioning

confidence: 99%

Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al2O3/H2O Nanofluids through a Lattice Channel

2023

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A nanofluid is composed of a base fluid with a suspension of nanoparticles that improve the base fluid’s thermophysical properties. In this work, the authors have conducted experimental tests on an alumina-based nanofluid (Al2O3/H2O) moving inside a 3D-printed lattice channel. The unit cell’s lattice shape can be considered a double X or a double pyramidal truss with a common vertex. The test channel is 80 mm long and has a cross-sectional area, without an internal lattice with that has the dimensions H × W, with H = 5 mm and W = 15 mm. A nanofluid and a lattice duct can represent a good compound technique for enhancing heat transfer. The channel is heated by an electrical resistance wound onto its outer surface. The heat transfer rate absorbed by the nanofluid, the convective heat transfer coefficients, and the pressure drops are evaluated. The experimental tests are carried out at various volumetric contents of nanoparticles (φ = 1.00%, φ = 1.50% and φ = 2.05%) and at various volumetric flow rates (from 0.2 L/min to 2 L/min). The preliminary results show that in the range between 0.5 L/min ÷ 2.0 L/min, the values of convective heat transfer coefficients are greater than those of pure water (φ = 0) for all concentrations of Al2O3; thus, the nanofluid absorbed a higher thermal power than the water, with an average increase of 6%, 9%, and 14% for 1.00%, 1.50% and 2.05% volume concentrations, respectively. The pressure drops are not very different from those of water; therefore, the use of nanofluids also increased the cooling efficiency of the system.

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Section: Introductionmentioning

confidence: 99%

Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al2O3/H2O Nanofluids through a Lattice Channel

2023

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“…Nanofluid is known as a new generation fluid which is developed by suspension of solid particles typically sized less than 100 nm in any base fluid. This technology has been researched for various cooling applications such as automobile radiators, solar panel cooling, battery cooling in electric vehicles, biomedical technology and coolant in the machining process [ 21 , 22 , 23 ]. For the application of oil as transformer insulation, only mono nanofluid has been tested in vegetable oil.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers

2022

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The massive demand in the electrical power sector has resulted in a large demand for reliable, cost efficient, and environmentally friendly insulation oil to reduce the dependency on mineral oil. The hybridization of nanoparticles in vegetable oil is a novel method to enhance the thermal properties of vegetable oil. This study focuses on the experimental investigation of the thermophysical properties of coconut oil, soybean oil, and palm oil-based hybrid nanofluids suspended with Al2O3-TiO2 nanoparticles at a mass concentration of 0.2, 0.4, and 0.6%. The ratio between Al2O3 and TiO2 nanoparticles was maintained constant at 50:50. The main purpose of the study is to evaluate the thermal conductivity, dynamic viscosity, and density of different vegetable base oils suspended with Al2O3-TiO2 in the temperature range of 30 to 60 °C. The influence of temperature on the augmentation of thermophysical properties for different vegetable oil-based hybrid nanofluids is investigated experimentally. The experimental results for thermal conductivity for the three types of base fluids show that the effect of nanoparticle mass concentration in thermal conductivity enhancement is less significant for temperatures more than 50 °C. The palm oil with a 0.6% Al2O3-TiO2 nanoparticle concentration exhibited the highest thermal conductivity with a 27.5% thermal conductivity enhancement relative to the base oil. The effect of nanofluid temperature on density and viscosity augmentation is more distinct compared with the impact of Al2O3-TiO2 nanoparticles concentrations. Among all three types of hybrid nanofluids, palm oil based nanofluids were found to have superior thermophysical properties compared with coconut oil and soybean oil, with the highest thermal conductivity of 0.628 W/m·k and lowest viscosity of 17.772 mPa·s.

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“…[2][3][4][5] Numerous research have arisen to describe the usefulness of nanosuspension in various fields of human activity. Recently Sheremet 6 approaches their article about more applications of this type of colloidal fluid by developing some parameters. Arjun and Rakesh 7 considered a nanofluidic flow passing over a circular cylinder and analyzed the heat transportation in it.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Cattaneo–Christov heat flux on the radiative MHD nanofluid flow past a stretched cylinder under multiple slip conditions

Bag

Kundu

2022

Heat Trans

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This investigation explores the features of velocity distribution, mass and heat transmissions of nanoliquid stream over a permeable cylinder accompanied by Cattaneo-Christov heat model and thermal radiation with nonlinear sort. Multiple slip conditions have been also encountered here. A magnetic force is oriented along vertically upward. The existence of thermophoresis together with Brownian motion has been assumed here. The foremost equations and associated boundary conditions have been normalized through the similarity technique. Then we solve the system numerically along with the fourth-order Runge-Kutta shooting scheme by using the software MAPLE-17 and round it with our preassigned accuracy level. The obtained outcomes are epitomized by tables and graphs. All of the impacts have been compared in suction and injection correspondingly and explained with proper reasoning. In charts, the physical consignments (such as Sherwood number, Nusselt number and skin friction) reveal the transference of mass and temperature and amount of friction by nanoparticles in the nanocomposition. For suction, the nanofluidic temperature gradually diminished due to the advanced thermal relaxation, whereas the contrary fact is exhibited in injection. The relaxation parameter of concentration provides a positive influence on mass

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Applications of Nanofluids

Abstract: Nanofluids as a combination of base fluid and a low concentration of nano-sized particles of metal or metal oxides are used in different fields of human activity, including engineering devices in power and chemical engineering, medicine, electronics, and others [...]

Cited by 23 publications

References 12 publications

Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al2O3/H2O Nanofluids through a Lattice Channel

Preliminary Results of Heat Transfer and Pressure Drop Measurements on Al2O3/H2O Nanofluids through a Lattice Channel

Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers

Impacts of Cattaneo–Christov heat flux on the radiative MHD nanofluid flow past a stretched cylinder under multiple slip conditions

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