Laminar nanofluid flow in microheat-sinks

Koo, Junemo; Kleinstreuer, Clement

doi:10.1016/j.ijheatmasstransfer.2005.01.029

Cited by 578 publications

(225 citation statements)

References 24 publications

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“…The ℎ for high Prandtl number base fluids is always higher than that for water base fluid. This is due to the fact that high Prandtl number base fluids are experiencing stronger thermal flow development effects as reported by Koo and Kleinstreuer [10]. However, there is no significant differences in ℎ for EG, oil, and glycerine but when the plot is zoomed in, there are slight differences in ℎ where glycerin base-cooled MCHS has the highest ℎ value, oil is in between, and EG is the least.…”

Section: Heat Transfer Coefficientmentioning

confidence: 64%

“…They showed that the enhancement percentage in thermal conductivity was not only a function of concentration and conductivities of the particles material and liquid, but it is also function of particle size and shape. Koo and Kleinstreuer [10] considered nanofluid flow in a representative microchannel, and conduction-convection heat transfer for different base fluids such as water and ethylene glycol with 20 nm CuO-nanoparticles. They come out with several suggestions which are a base fluid of high-Prandtl number such as ethylene glycol and oil should be used, using nanoparticles with high thermal conductivity are more advantageous, and a channel with high aspect ratio is desirable.…”

Section: Cooling Performance Of Mchsmentioning

confidence: 99%

“…Koo and Kleinstreuer [10] reported that higher Prandtl number base fluids-cooled MCHS could be able to enhance the heat transfer performance of MCHS as compared with water base-cooled MCHS. This was proven by the present results where the glycerin base-cooled MCHS has the highest ℎ value due to the highest Prandtl number value followed by oil, and EG.…”

Section: Heat Transfer Coefficientmentioning

confidence: 99%

See 2 more Smart Citations

Heat Transfer Enhancement in Microchannel Heat Sink Using Nanofluids

Gunnasegaran¹,

Shuaib²,

Mohammed³

et al. 2012

Fluid Dynamics, Computational Modeling and Applications

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Section: Heat Transfer Coefficientmentioning

confidence: 64%

Section: Cooling Performance Of Mchsmentioning

confidence: 99%

Section: Heat Transfer Coefficientmentioning

confidence: 99%

See 1 more Smart Citation

Heat Transfer Enhancement in Microchannel Heat Sink Using Nanofluids

Gunnasegaran¹,

Shuaib²,

Mohammed³

et al. 2012

Fluid Dynamics, Computational Modeling and Applications

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“…Likewise, as given in (Koo and Kleinstreuer 2005), the effective viscosity of nanofluids is given by…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…The peristaltic transport of blood under the effect of a magnetic field in nonuniform channels was studied by Mekheimer (2004). Further literature can be viewed through other references (Mekheimer 2008a, b;Akbar et al 2014a;Koo and Kleinstreuer 2004b;Abu-Nada 2010;Ghasemi and Aminossadati 2010;Koo and Kleinstreuer 2005;Nadeem et al 2014a;Ibrahim and Hamad 2006;Abu-Nada 2009;Jang and Choi 2007;Akbar and Khan 2015;Ellahi et al 2014;Akbar et al 2014b;Nadeem et al (2014b, c) Akbar 2014Sheikholeslami et al 2015;Sheikholeslami et al 2014a, b;Sheikholeslami and Gorji-Bandpy 2014). The aim of this study is to look at the effects of induced magnetic field on the peristaltic flow of four different nanoparticles with the base fluid water in the presence of Brownian motion, in a vertical asymmetric channel.…”

Section: Introductionmentioning

confidence: 99%

Impulsion of induced magnetic field for Brownian motion of nanoparticles in peristalsis

Akbar

Raza²,

Ellahi

2015

Appl Nanosci

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In the present study, we examined the effect of induced magnetic field for the peristaltic flow of four different nanoparticles with the base fluid water in the presence of Brownian motion, in a vertical asymmetric channel. The mathematical formulation is presented. Exact solutions have been evaluated for the resulting equations. The obtained expressions for velocity, temperature, pressure gradient and magnetic force function are described through graphs for various pertinent parameters. The streamlines are drawn for some physical quantities to discuss the trapping phenomenon.

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Applications and Future Directions

2007

Nanofluids

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Today more than ever, many industries facing thermal challenges have a pressing need for ultrahigh-performance cooling. However, conventional coolants are inherently poor heat transfer fluids. Therefore, a strong need exists for new and innovative concepts to achieve ultrahigh-performance cooling in thermal management systems. Although particle-in-liquid suspensions or slurries are frequently used in industry, they are not suitable for heat transfer applications, due to severe problems caused by large particles in those suspensions or slurries. The major problem with traditional suspensions containing millimeter-or micrometer-sized particles is the rapid settling of these particles. If the fluid were kept circulating to prevent much settling, the microparticles would damage the walls of the pipe, wearing them thin. Other problems include large increases in pressure drop and clogging, particularly in small thermal control systems.Nanofluids are a new type of heat transfer fluid engineered by uniform and stable suspension of nanometer-sized particles into liquids. Most nanofluids are very dilute suspensions of nanoparticles in liquids and contain a very small quantity, preferably less than 1% by volume, of nanoparticles. The average size of nanoparticles used in nanofluids may vary from 1 to 100 nm (preferably < 10 nm). Because nanoparticles are so small, they remain in suspension almost indefinitely and dramatically reduce erosion and clogging compared with the suspension of larger particles. Also, their larger surface area may improve heat transfer.A number of experiments show that stable suspensions of a small amount of nanoparticles in traditional fluids produce dramatic changes in the thermal properties of base fluids. It has been shown that stable nanofluids have distinctive features such as high thermal conductivities at very low nanoparticle concentrations (Eastman et al., 2001;Patel et al., 2003), a nonlinear relationship between thermal conductivity and particle concentration Hong et al., 2005;Murshed et al., 2005;Chopkar et al., 2006), strong temperature-and size-dependent conductivity (Das et al., 2003bb;Chon et al., 2005) and a threefold increase in critical heat flux in pool boiling compared to base fluids (You et al., 2003;Vassallo et al., 2004). Furthermore, recent experiments have shown that some nanofluids enhance the convective heat transfer coefficient by up to 100% compared to that of water (Xuan and Li, 2003; Nanofluids: Science and Technology,

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Laminar nanofluid flow in microheat-sinks

Cited by 578 publications

References 24 publications

Heat Transfer Enhancement in Microchannel Heat Sink Using Nanofluids

Heat Transfer Enhancement in Microchannel Heat Sink Using Nanofluids

Impulsion of induced magnetic field for Brownian motion of nanoparticles in peristalsis

Applications and Future Directions

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