Investigation on viscosity of Fe3O4 nanofluid under magnetic field

Wang, Lijun; Wang, Yongheng; Yan, Xiaokang; Wang, Xinyong; Feng, Biao

doi:10.1016/j.icheatmasstransfer.2016.01.013

Cited by 100 publications

(26 citation statements)

References 40 publications

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“…10 Comparison between present viscosity values and data in Refs. [16,22] at the shear rate of 73.38 s −1 These results, from Figs. 12 and 13, indicate that the Colace is recommended as the optimal surfactant for the reduction of the viscosity of the Fe 3 O 4 -water nanofluid, whereas the sodium dodecyl sulfate (SDS) is recommended for the CNT-water nanofluids.…”

Section: Tests Of Nanofluid Viscositiessupporting

confidence: 52%

“…This is because nanoparticles show more interactions at high volume fraction, which increases the probability of the nanoparticle agglomeration. Wang et al [16] Experimental data (colace) T/K Base fluid: water Theoretical values [16] Wang et al [16] Kestin et al [22] Experimental data µ/cP Fig. 10 Comparison between present viscosity values and data in Refs.…”

Section: Tests Of Nanofluid Viscositiesmentioning

confidence: 88%

“…Compared with the equations for the Fe 3 O 4 -water and CNT-water nanofluids, Eqs. (14)- (16) show a lower average deviation for the nanofluid with hybrid nanoparticles, and the maximum value of the deviation is 3.50% at θ = 0.1-0.5% and φ ≤ 1%.…”

Section: Fitting Of Empirical Formulasmentioning

confidence: 91%

“…1 vol% Fe 3 O 4 -water nanofluid with a ratio of nanoparticles to Colace (10:1) was mixed with the distilled water. Experimental values of the nanofluid viscosity are compared with results in other references (Wang et al [16] and Kestin et al [22]). Figure 10 presents a validation of the reliability of the present testing results.…”

Section: Tests Of Nanofluid Viscositiesmentioning

confidence: 91%

“…They found that the viscosity of the nanofluid depended on the nanoparticle material and decreased with an increase in the particle size. Wang et al [16] experimentally studied effects of magnetic field, solid volume concentration, and temperature on viscosity of a Fe 3 O 4 -water nanofluid. It was observed that compared with 0.5 vol% nanofluid, the viscosity of 5.0 vol% Fe 3 O 4 nanofluid increased by 22.5% at 293 K. Yang et al [17] proposed a theoretical model to predict viscosity of water-based Newtonian nanofluids.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of various surfactants on stability and thermophysical properties of nanofluids

Wang

et al. 2020

J Therm Anal Calorim

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The effect of Fe 3 O 4 nanoparticles and carbon nanotubes (CNTs) on the viscosity of a nanofluid is experimentally investigated from 278 to 313 K by changing the nanoparticle volume fraction. These nanoparticles were put into distilled water with various surfactants, i.e., Colace (docusate sodium), trisodium citrate dihydrate (TSC), polyvinyl pyrrolidone, cetyl trimethylammonium bromide, tetramethylammonium hydroxide (TMAH), acacia senegal (GA), sodium dodecyl benzene sulfonate, sodium dodecyl sulfate (SDS), and sodium laurylsulfonate (SLS). Based on the present measurements, new empirical formulas are proposed for Fe 3 O 4-water, CNT-water and Fe 3 O 4-CNT-water nanofluids to provide accurate predictions for the nanofluid viscosity. Based on the viscosity testing, stabilities and thermal conductivities of Fe 3 O 4-TMAH, Fe 3 O 4-Colace, Fe 3 O 4-TSC, CNT-SDS, CNT-GA, Fe 3 O 4-CNT-SLS, and Fe 3 O 4-CNT-TSC nanofluids with a volume concentration of 0.5% are investigated in the present research. Results indicate that better stability, smaller viscosity, and higher thermal conductivity are obtained, when the surfactants TMAH, SDS, and SLS are added into the Fe 3 O 4-water, CNT-water, and the Fe 3 O 4-CNT-water nanofluid, respectively. The CNT-water and Fe 3 O 4-CNT-water nanofluids exhibit a shear-thinning behavior, whereas a linear rheological behavior can be observed by water-based Colace-Fe 3 O 4 , TMAH-Fe 3 O 4 , and TSC-Fe 3 O 4 nanofluids. Keywords Nanofluid • Thermal conductivity • Carbon nanotube • Viscosity • Surfactant List of symbols k Thermal conductivity (W m −1 K −1) T Temperature (K) U Uncertainty Greek symbols θ Surfactant ratio fraction μ Dynamic viscosity (Pa s) φ Nanoparticle volume fraction Subscripts f Base fluid nf Nanofluid

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Section: Tests Of Nanofluid Viscositiessupporting

confidence: 52%

Section: Tests Of Nanofluid Viscositiesmentioning

confidence: 88%

Section: Fitting Of Empirical Formulasmentioning

confidence: 91%

Section: Tests Of Nanofluid Viscositiesmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of various surfactants on stability and thermophysical properties of nanofluids

Wang

et al. 2020

J Therm Anal Calorim

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Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self‐Driving Liquid Conveyor Belt

Zhang

Lin

Liu

et al. 2022

Adv Funct Materials

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Temperature gradient-induced Marangoni convection has attracted much attention for basic research and applications since it provides an effective means for mass and heat transfer through a liquid surface flow. Here the authors first propose a general principle to enhance such surface flow by hindering its transition to recirculation flow using an external field. They subsequently identify ferrofluid and use it validate the principle since its reduced magnetic susceptibility at higher temperatures will make the heated surface liquid stay on the surface by a thermomagnetic body force. Using a laser beam to create a heated local surface and a magnet beneath the ferrofluid to provide a vertical field, a high speed and long-range Marangoni flow is confirmed experimentally and further supported by computational fluid dynamics simulations. To demonstrate possible applications, the authors show a self-driving pipeless liquid conveyor belt that can efficiently transfer heat from a source to sink without external power. The demonstration of enhanced Marangoni convection opens new avenue to explore interfacial fluid dynamics and its wide applications.

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Laser‐Controlled Ferrohydrodynamic Fluid Cavities for Modulation of Ultrasonic Waves

Wang,

Jin,

Yao

et al. 2024

Adv Funct Materials

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Ferrohydrodynamic pumps, with their compact design, offer a practical and efficient alternative to traditional pneumatic or mechanical pumps for driving microfluidic channels and fluidic devices, eliminating mechanical vibrations. A novel self‐circulating ferrohydrodynamic system has been developed to remotely control fluid flow within a linear acoustic cavity using a laser‐induced photothermal temperature gradient. This system enables the modulation of fluid flow rates in compact channels through adjustments in a D.C. magnetic field or laser‐induced surface temperature changes. Notably, laser intensity can accelerate, decelerate, or reverse flow rates within the channel, influencing ultrasonic waves propagating through fluidic cavities designed to resonate between 500 kHz and 700 kHz. The dynamic nature of the magnetoactive fluid cavity enhances wave‐matter interactions, particularly in acoustic domains. Laser‐induced flow control allows for precise manipulation of ultrasonic wave characteristics such as frequency, amplitude, mode splitting, phase shifting, and unidirectional transmission. This capability also supports the optical regulation of acoustic energy flow rates by halting or reversing fluid motion within the cavity. These advancements hold significant potential for applications in cavity acoustodynamics and underwater signal processing, promising innovations in remote fluidic control and acoustic modulation technologies.

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Investigation on viscosity of Fe3O4 nanofluid under magnetic field

Cited by 100 publications

References 40 publications

Effect of various surfactants on stability and thermophysical properties of nanofluids

Effect of various surfactants on stability and thermophysical properties of nanofluids

Magnetically Enhanced Marangoni Convection for Efficient Mass and Heat Transfer like a Self‐Driving Liquid Conveyor Belt

Laser‐Controlled Ferrohydrodynamic Fluid Cavities for Modulation of Ultrasonic Waves

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