Heat transfer characteristics of Fe3O4 ferrofluid flowing in a mini channel under constant and alternating magnetic fields

Ghasemian, Masoud; Ashrafi, Z. Najafian; Goharkhah, Mohammad; Ashjaee, Mehdi

doi:10.1016/j.jmmm.2014.12.078

Cited by 99 publications

(30 citation statements)

References 16 publications

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“…Eqs. (13) and (14) are solved along with the condition (15) and the comparison is analyzed through graphs and tables by using different nanofluid arrangements (Table 1). Fig.…”

Section: Resultsmentioning

confidence: 99%

“…These characteristics make such fluids important in numerous applications like viscous damper for gravity gradient satellites, rotating anode X-ray generators, energy conversion devices, magnetic cell separation and magnetic drug targeting. Studies regarding the nano fluid flow with different flow geometries are listed [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Suction/injection of the fluid from the boundary of the system can considerably affect the flow.…”

Section: Introductionmentioning

confidence: 99%

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Series solution of slip flow of Al2O3 and Fe3O4 nanoparticles in a horizontal channel with porous medium by using least square and Galerkin methods

et al. 2019

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In this problem, a theoretical study is presented for the slip effects on the twodimensional flow of a nano liquid in a semi-porous channel designed by two long rectangular plates having porous media. One of the channel walls is porous and other is rigid as well as slippery. A transverse magnetic field of homogenous strength is also applied to direction of flow. Magnetic nanoparticles   34 Fe O and non-magnetic nanoparticles   23 Al O are considered with ethylene glycol (EG) and water as base fluids (BFs). Least Square method (LSM) and Galerkin method (GM) are adopted to solve the equations, transformed from partial differential equations (DEs) to ordinary ones by Berman's similarity transformations. The obtained results from the two analytical methods are compared with the results obtained by fourth order Runge-Kutta numerical method (NM). By comparing the results of GM and LSM it is observed that variation in velocity profiles is minimal however the accuracy of GM is higher than LSM. The contributions of various flow parameters are presented through graphs. Results show a decrement in the fluid velocity with an increase in the slip and porosity parameter. The fluid boundary layer decreases with an increase in the Reynolds number. Flow field is less for the case of magnetic nanoparticles as compared to nonmagnetic particles.

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“…Eqs. (13) and (14) are solved along with the condition (15) and the comparison is analyzed through graphs and tables by using different nanofluid arrangements (Table 1). Fig.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Series solution of slip flow of Al2O3 and Fe3O4 nanoparticles in a horizontal channel with porous medium by using least square and Galerkin methods

et al. 2019

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“…Based on the results discussed in the previous section, the presence of nanoparticles alone has been found to improve the mass transfer performance of liquid-liquid extractors. However, applying an external magnetic field to magnetic or electrically conducting nanoparticles can increase this effect, because the field presumably induces stronger micro-convection, and the particles can also be used as an innovative mixing agent [160][161][162]. They also evaluated the influence of the magnetic nanoparticle concentration on extraction performance under different magnetic field strengths.…”

Section: Magnetic Nanoparticles Under a Magnetic Fieldmentioning

confidence: 99%

A critical review on the use of nanoparticles in liquid–liquid extraction

Amani

Ahmadi

et al. 2018

Chemical Engineering Science

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Recently, the use of nanoparticles in extraction columns has gained increasing attention due to their potential to enhance mass transfer processes. Most of the reported work, however, has been concerned with mass transfer enhancement in gas-liquid systems in the presence of nanoparticles, while limited studies of liquid-liquid systems have been reported. Liquidliquid extraction is an extensively employed separation method that has taken on a substantial role in engineering and industrial applications for recovery processes. Therefore, the aim of this review article is to provide an overview of the state-of-the-art from the available literature on the effect of nanoparticles on the hydrodynamic behavior and mass transfer performance of liquid-liquid systems. Attention is also given to providing an understanding of the mechanisms responsible for the improvements in mass transfer with the use of nanoparticles. In the majority of studies, the presence of nanoparticles was found to be beneficial and to lead to improved mass transfer, although a few investigations reported a detrimental impact of nanoparticles. The literature does not clearly describe the conditions under which the addition of nanoparticles would be unfavorable. Moreover, the addition of nanoparticles always introduces potential drawbacks, such as sedimentation, accumulation, or clogging inside extraction columns, as well as the need to separate the nanoparticles at the outlets. These drawbacks have not been considered in the literature, limiting the practical employment of nanoparticles in this industry.

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“…O comportamento magnético da Fe 3 O 4 leva a estudos nas mais diversas áreas de pesquisas tecnológicas com propriedades eletromagnéticas peculiares e várias aplicações promissoras como, por exemplo, em ferrofluidos [5], bioseparação [6], tratamento de hipertermia [7], ressonância magnética [8], catálise [9], dispositivos magnéticos [10], carreador de fármacos [11], entre outros. Estas propriedades e aplicações potenciais criaram uma tendência em todo o mundo para desenvolver estratégias relacionadas ao melhoramento dos métodos de processamento já existentes ou desenvolvimento de novos métodos de processamento para a fabricação desse material de forma a se obter um produto monofásico e com partículas de tamanho nanométrico.…”

Section: Avaliação Microestrutural E Magnética De Fe 3 O 4 Sintetizadunclassified

Avaliação microestrutural e magnética de Fe3O4 sintetizada pelo método de reação de combustão

et al. 2015

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ResumoNanopartículas de magnetita têm sido objeto de inúmeras pesquisas científicas em diversas áreas, como por exemplo na biomedicina, devido à magnetização espontânea, estabilidade química e não toxicidade. Este trabalho tem como objetivo avaliar as propriedades microestruturais e magnéticas de nanopartículas de magnetita (Fe3O4) sintetizadas por reação de combustão induzida em forno de micro-ondas sob atmosfera de nitrogênio. A influência do fluxo de N2 durante a síntese na estrutura, morfologia e característica magnética do produto sintetizado foi investigada. As amostras foram caracterizadas por difração de raios X, microscopia eletrônica de varredura e medidas magnéticas. Os resultados mostram que foi possível obter a fase magnetita com traços de hematita (Fe2O3). O fluxo de N2 e o tempo de exposição interferiram na estrutura e na característica magnética do produto sintetizado. Todas as amostras apresentaram pequenos aglomerados de formas irregulares e tamanhos que variam em aproximadamente 20 μm e magnetização de saturação entre 31 e 70 emu/g, mostrando ser materiais promissores para aplicações na biomedicina.

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Heat transfer characteristics of Fe3O4 ferrofluid flowing in a mini channel under constant and alternating magnetic fields

Cited by 99 publications

References 16 publications

Series solution of slip flow of Al2O3 and Fe3O4 nanoparticles in a horizontal channel with porous medium by using least square and Galerkin methods

Series solution of slip flow of Al2O3 and Fe3O4 nanoparticles in a horizontal channel with porous medium by using least square and Galerkin methods

A critical review on the use of nanoparticles in liquid–liquid extraction

Avaliação microestrutural e magnética de Fe3O4 sintetizada pelo método de reação de combustão

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