Synthesis and Characterization of Nanofluids: Thermal Conductivity, Electrical Conductivity and Particle Size Distribution

Barai, Divya P.; Chichghare, Kalyani K.; Chawhan, Shivani S.; Bhanvase, Bharat A.

doi:10.1007/978-3-030-33774-2_1

Cited by 8 publications

(4 citation statements)

References 158 publications

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“…In that case, plasma electrode oxidation (PEO) and thermal spray (TS) have been selected as oxidation coating methods due to their isolation properties [ 34 , 35 , 36 , 37 ] and biocompatibility evaluation [ 38 , 39 , 40 , 41 , 42 ].…”

Section: Introductionmentioning

confidence: 99%

Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices

Vaquero-Gallardo,

Millán-Blasco,

Martínez-García

2024

Sensors

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Active medical devices rely on a source of energy that is applied to the human body for specific purposes such as electrosurgery, ultrasounds for breaking up kidney stones (lithotripsy), laser irradiation, and other medical techniques and procedures that are extensively used. These systems must provide adequate working power with a commitment not to produce side effects on patients. Therefore, the materials used in these devices must effectively transmit energy, allow for security control, sense real-time variations in case of any issues, and ensure the implementation of closed-loop systems for control. This work extends to the experimental data adjustment of some different coating techniques based on plasma electro-oxidation (PEO) and thermal spray (TS) using fractional-order models. According to the physical structure of the coating in different coating techniques, Cole family models were selected. The experimental data were obtained by means of a vector network analyzer (VNA) in the frequency spectrum from 0.3 MHz to 5 MHz. The results show that some models from the Cole family (the single-dispersion model and inductive model) offered a goodness of fit to the experimental impedance in terms of RMSE error and a squared error R2 close to unity. The use of this type of fractional-order electrical model allows an adjustment with a very small number of elements compared to integer-order models, facilitating its use and a consequent reduction in instrumentation cost and the development of control devices that are more robust and easily miniaturized for embedded applications. Additionally, fractional-order models allow for more accurate assessment in industrial and medical applications.

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Section: Introductionmentioning

confidence: 99%

Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices

Vaquero-Gallardo,

Millán-Blasco,

Martínez-García

2024

Sensors

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“…Several studies reveal their intensifying performance on heat transfer systems [15,16]. Nanofluids exhibit high thermal transport because of the high thermal conductivity of the nanoparticles [17]. Various mechanisms have been identified that play a role in imparting high thermal transport properties by the addition of nanoparticles in liquids [18]; however, these mechanisms are also impacted by various factors related to the nanomaterial type and its synthesis process, nanoparticle shape and size, concentration of nanoparticles and surfactants, method of nanofluid preparation, temperature, etc.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Thermal Conductivity of Water-Based Fe3O4 Nanofluid: An Effect of Ultrasonication Time

2022

Self Cite

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Nanofluid preparation is a crucial step in view of their thermophysical properties as well as the intended application. This work investigates the influence of ultrasonication duration on the thermal conductivity of Fe3O4 nanofluid. In this work, water-based Fe3O4 nanofluids of various volume concentrations (0.01 and 0.025 vol.%) were prepared and the effect of ultrasonication time (10 to 55 min) on their thermal conductivity was investigated. Ultrasonication, up to a time duration of 40 min, was found to raise the thermal conductivity of Fe3O4 nanofluids, after which it starts to deteriorate. For a nanofluid with a concentration of 0.025 vol.%, the thermal conductivity increased to 0.782 W m−1K−1 from 0.717 W m−1K−1 as the ultrasonication time increased from 10 min to 40 min; however, it further deteriorated to 0.745 W m−1K−1 after a further 15 min increase (up to a total of 55 min) in ultrasonication duration. Thermal conductivity is a strong function of concentration of the nanofluid; however, the optimum ultrasonication time is the same for different nanofluid concentrations.

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“…For the recent developments in thermal and electrical conductivities of this novel thermal fluid, various factors affect it, including the cluster of nanoparticle type, temperature, preparation methods, surfactant, and volume concentration. It was found that the rise in temperature and volume concentration of nanofluids generally led to linearly incrementing their thermal and electrical conductivities [ 25 , 26 , 27 ]. Heyhat and Irannezhad [ 28 ] created the thermoelectrical conductivity (TEC) ratio according to the acquired experimental data and thoroughly checked it.…”

Section: Introductionmentioning

confidence: 99%

Estimations on Properties of Redox Reactions to Electrical Energy and Storage Device of Thermoelectric Pipe (TEP) Using Polymeric Nanofluids

Gang

Wang

2021

Polymers

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A thermoelectric pipe (TEP) is constructed by tubular graphite electrodes, Teflon material, and stainless-steel tube containing polymeric nanofluids as electrolytes in this study. Heat dissipation and power generation (generating capacity) are both fulfilled with temperature difference via the thermal-electrochemistry and redox reaction effects of polymeric nanofluids. The notion of TEP is to recover the dissipative heat from the heat capacity generated by the relevant machine systems. The thermal conductivity and power density empirical formulas of the novel TEP were derived through the intelligent dimensional analysis with thermoelectric experiments and evaluated at temperatures between 25 and 100 °C and vacuum pressures between 400 and 760 torr. The results revealed that the polymeric nanofluids composed of titanium dioxide (TiO2) nanoparticles with 0.2 wt.% sodium hydroxide (NaOH) of the novel TEP have the best thermoelectric performance among these electrolytes, including TiO2 nanofluid, TiO2 nanofluid with 0.2 wt.% NaOH, deionized water, and seawater. Furthermore, the thermal conductivity and power density of the novel TEP are 203.1 W/(m·K) and 21.16 W/m3, respectively.

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Synthesis and Characterization of Nanofluids: Thermal Conductivity, Electrical Conductivity and Particle Size Distribution

Cited by 8 publications

References 158 publications

Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices

Fractional-Order Electrical Modeling of Aluminum Coated via Plasma Electro-Oxidation and Thermal Spray Methods to Optimize Radiofrequency Medical Devices

Experimental Investigation of Thermal Conductivity of Water-Based Fe3O4 Nanofluid: An Effect of Ultrasonication Time

Estimations on Properties of Redox Reactions to Electrical Energy and Storage Device of Thermoelectric Pipe (TEP) Using Polymeric Nanofluids

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