Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Abdullah, Abdul Adam; Mohamad, Imran Syakir; Hashim, Ahmed; Abdullah, Norli; Wei, Peng; Isa, Mohamed Hafiz; Abidin, Syazwani Zainal

doi:10.15282/jmes.10.3.2016.4.0210

Cited by 23 publications

(18 citation statements)

References 34 publications

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“…(27). (27) The dimensionless form of velocity and temperature gradient vectorial variables can be defined as: (28) The dimensionless vectors in Eq. (28) can be used for the non-dimensionalization of Eq.…”

Section: (7)mentioning

confidence: 99%

“…Besides, convection performance can be further increased through the suspension of high-thermal-conductivity nanoparticle in conventional coolant [15][16][17][18]. This innovative type of fluid is coined as nanofluid which displays an exceptional potential in increasing the convection performance [19][20][21][22] because of the intensified synergy between the heat and flow fields [23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heat and Flow Characteristics of Nanofluid Flow in Porous Microchannels

Ting

Hung²,

Osman

et al. 2018

Int. J. Automot. Mech. Eng.

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In the present study, convective flow of nanofluid in porous microchannel is analyzed by utilizing field synergy principle. The effects of porous medium embedment on the field synergy of water-Al 2 O 3 nanofluid is investigated based on locally thermal nonequilibrium model. Energy equations for both fluid and solid phases are solved analytical while the field synergy formulations based on viscous dissipative flow are developed. It is observed that the interstitial heat transfer affects the field synergy of the flow tremendously. The deviation between one-energy-equation model and two-energyequation model reduces when the field synergy of the system increases. With the embedment of porous medium, the convection performance of microchannel is enhanced due to the increased synergy between the heat and flow fields. Besides, the field synergy of the system can be further enhanced by suspending nanoparticle in conventional fluid. This study provides an auxiliary point of view on the distinctive convection performance of nanofluid flow in porous microchannel.

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Section: (7)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat and Flow Characteristics of Nanofluid Flow in Porous Microchannels

Ting

Hung²,

Osman

et al. 2018

Int. J. Automot. Mech. Eng.

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show abstract

“…San et al [28] studied the effect of different ions on nanosilicastabilized CO2-foam generation, who demonstrated stable foam as the synthetic produced water and nanosilica dispersion and CO2 flowed through a porous medium. Besides its potential application in EOR, nanoparticle provides significant contribution to heat transfer performance and improvement of thermal properties in ethylene glycol-based nanofluid utilizing titanium dioxide (TiO2) nanoparticle [29], zink oxide (ZnO) and TiO2 nanoparticles [30] and carbon nanotube (CNT) [31]. Zakaria et al [32] have reviewed the potential of adopting nanofluid as an alternative coolant in polymer electrolyte membrane fuel cell (PEMFC) cooling systems, while TiO2 nanotubes were formed in fluorinated organic electrolyte, resulting in longer nanotubes with higher energy conversion efficiencies during photoelectrochemical [33].…”

Section: Introductionmentioning

confidence: 99%

Aqueous foams stabilized with silica nanoparticle and alpha olefin sulfonates surfactant

Mohd¹,

Bakar²,

Awang³

et al. 2018

JMES

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Carbon dioxide (CO2) foams have been introduced to improve mobility of CO2 in CO2 flooding. However, using surfactant alone to stabilize CO2 foam has potential weaknesses such as high surfactant retention in porous media and the foam is thermodynamically unstable for a long-term. Nanoparticle has been an alternative in stabilizing CO2 foam longer. This study aims to analyze CO2 foam stability at varying concentrations of surfactant, silica nanoparticle (SNP) and brine. The additions of SNP in anionic surfactant of alpha olefin sulfonates (AOS)-water and in AOS-brine towards foam stability were demonstrated in this study. CO2 foam stability was measured through the foam height observation and bubble size analysis. The performance of SNP and AOS suspensions in stabilizing foam were observed at different concentrations of AOS (0.1, 0.3 and 0.5 wt%), SNP (0.1, 0.3 and 0.5 wt%) and brine (0.1, 1 and 5 wt%). The results revealed that the CO2 foams were most stable at 0.3 wt% SNP suspension in 0.5 wt% AOS-water. It was found that the most stable foams formed at concentration of 1 wt% of brine. Smaller and uniform bubble size has been produced at 0.3 wt% SNP in 0.5 wt% AOS solution. Thus, concentrations of surfactant, SNP and brine have significant effects on CO2 foam stability.

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“…By adding a small amount of nanoparticles (less than 1% by volume) in conventional heat transfer fluids, researchers showed the enhancement of thermal conductivity up to two times (approximately). Compared to the base fluids, thermal conductivity of nanofluid is very high [14][15][16][17][18] and so these are used in many energetic systems such as cooling of nuclear systems, radiators, natural convection in enclosures, drawing of copper wires, continuous stretching of plastic films, artificial fibres, hot rolling, wire drawing, glass fibre and metal extrusion and metal spinning, etc. Furthermore, due to their excellent wetting and spreading behaviour, nanofluids have important applications for cleaning oil from surfaces.…”

Section: Introductionmentioning

confidence: 99%

MHD slip flow and heat transfer of Casson nanofluid over an exponentially stretching permeable sheet

Ghosh¹,

Mukhopadhyay²

2017

Int. J. Automot. Mech. Eng.

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The aim of the present paper is to discuss the boundary layer flow induced in a nanofluid due to a stretching permeable sheet in the presence of a magnetic field. Instead of no-slip boundary conditions, slips at the boundary have been considered. Casson fluid model was used to characterise the non-Newtonian fluid behaviour. The effects of Brownian motion and thermophoresis on heat and mass transfer were considered. Using similarity transformations, the governing partial differential equations were transformed into ordinary ones. The self-similar equations were then solved numerically using shooting technique with fourth order Runge-Kutta method. The solutions for velocity, temperature and concentration fields depended on the pertinent parameters. It was observed that the velocity decreased but the temperature and nanoparticle volume fraction increased with the increase of Casson fluid parameter. With the increase in velocity slip parameter as well as magnetic parameter, fluid velocity decreased. Due to increase in thermal slip, temperature decreased and with the increase in mass slip parameter, concentration also decreased. Temperature was found to increase but the nanoparticle volume fraction decreased due to the Brownian motion. On the other hand, temperature and nanoparticle volume fraction were both found to increase with the increase of thermophorosis parameter as well as with the increasing strength of magnetic parameter. Thus, velocity slip at the boundary and magnetic parameter acted as flow controlling parameters. It is believed that this type of investigation is very much helpful for the manufacturing of complex fluids and also for cleaning oil from surfaces.

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Thermal conductivity and viscosity of deionised water and ethylene glycol-based nanofluids

Cited by 23 publications

References 34 publications

Heat and Flow Characteristics of Nanofluid Flow in Porous Microchannels

Heat and Flow Characteristics of Nanofluid Flow in Porous Microchannels

Aqueous foams stabilized with silica nanoparticle and alpha olefin sulfonates surfactant

MHD slip flow and heat transfer of Casson nanofluid over an exponentially stretching permeable sheet

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