Experimental investigation of rheological behavior of the hybrid nanofluid of MWCNT–alumina/water (80%)–ethylene-glycol (20%)

Afshari, Ashkan; Akbari, Mohammad; Toghraie, Davood; Yazdi, Mohammad Eftekhari

doi:10.1007/s10973-018-7009-1

Cited by 173 publications

(43 citation statements)

References 47 publications

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“…It is worth noting that Equation is only applicable to spherical particles/nanoparticles and low particle volume fractions. Brinkman postulated the relationship between viscosity of solutions and suspensions of moderate particles of the form

\frac{μ_{n f}}{μ_{b f}} = \frac{1}{{(1 - ϕ)}^{2.5} .}

An extension of the model for the case where viscosity of the nanofluid

μ_{n f}

, viscosity of the base fluid

μ_{b f}

for blood‐gold nanofluid as adopted by Changdar and De is of the form

\frac{μ_{n f}}{μ_{b f}} = 1 + 7.3 ϕ + 123 ϕ^{2}, for ϕ > 0.02

Based on the outcome of the experimental result carried out by Afshari et al . Mintsa et al .…”

Section: Description Of the Boundary Layer Flow Formulation Of Govermentioning

confidence: 99%

Heat transfer in the flow of blood‐gold Carreau nanofluid induced by partial slip and buoyancy

Kọrikọ

Animasaun

Mahanthesh

et al. 2018

Heat Trans. Asian Res.

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Dynamics of blood containing gold nanoparticles on a syringe and other objects with a nonuniform thickness is of importance to experts in the industry. This study presents the significance of partial slip (i.e. combination of linear stretching and velocity gradient) and buoyancy on the boundary layer flow of blood-gold Carreau nanofluid over an upper horizontal surface of a paraboloid of revolution (uhspr). In this report, the viscosity of the Carreau fluid corresponding to an infinite shear-rate is assumed as zero, meanwhile, the viscosity corresponding to zero shear-rate, density, thermal conductivity, and heat capacity were assumed to vary with the volume fraction of nanoparticles. The governing equation that models the transport phenomenon were non-dimensionalized and parameterized using suitable similarity variables and solved numerically using classical Runge-Kutta method with shooting techniques and MATLAB bvp4c package for validation. The results show that temperature distribution across the flow decreases more significantly with buoyancy-related parameter when the influence of partial slip was maximized. Maximum velocity of the flow is ascertained at larger values of partial slip and buoyancy parameters. At smaller values of Deborah number and large values of volume fraction, 806

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\frac{μ_{n f}}{μ_{b f}} = \frac{1}{{(1 - ϕ)}^{2.5} .}

An extension of the model for the case where viscosity of the nanofluid

μ_{n f}

, viscosity of the base fluid

μ_{b f}

for blood‐gold nanofluid as adopted by Changdar and De is of the form

\frac{μ_{n f}}{μ_{b f}} = 1 + 7.3 ϕ + 123 ϕ^{2}, for ϕ > 0.02

Based on the outcome of the experimental result carried out by Afshari et al . Mintsa et al .…”

Section: Description Of the Boundary Layer Flow Formulation Of Govermentioning

confidence: 99%

Heat transfer in the flow of blood‐gold Carreau nanofluid induced by partial slip and buoyancy

Kọrikọ

Animasaun

Mahanthesh

et al. 2018

Heat Trans. Asian Res.

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“…The study of rheological characteristics of several nanofluids has therefore attracted the interest of many researchers. As reported in references [5][6][7][8][9][10], the nanofluids can exhibit either or both Newtonian and non Newtonian behaviors.…”

Section: Introductionmentioning

confidence: 71%

Magnetic field impact on nanofluid convective flow in a vented trapezoidal cavity using Buongiorno's mathematical model

Benzema¹,

Benkahla²,

Boudiaf³

et al. 2019

Eur. Phys. J. Appl. Phys.

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Numerical study for the effect of an external magnetic field on the mixed convection of Al2O3–water Newtonian nanofluid in a right-angle vented trapezoidal cavity was performed using the finite volume method. The non-homogeneous Buongiorno model is applied for numerical description of the dynamic phenomena inside the cavity. The nanofluid, with low temperature and high concentration, enters the cavity through the upper open border, and is evacuated through opening placed at the right end of the bottom wall. The cavity is heated from the inclined wall, while the remainder walls are adiabatic and impermeable to both the base fluid and nanoparticles. After validation of the model, the analysis was carried out for a wide range of Hartmann number (0 ≼ Ha ≼ 100) and nanoparticles volume fraction (0 ≼ ϕ0 ≼ 0.06). The flow behavior as well as the temperature and nanoparticles distribution shows a particular sensitivity to the variations of both the Hartmann number and the nanofluid concentration. The domination of conduction mechanism at high Hartmann numbers reflects the significant effect of Brownian diffusion which tends to uniform the distribution of nanoparticles in the domain. The average Nusselt number which increases with the nanoparticles addition, depends strongly on the Hartmann number. Finally, a correlation predicting the average Nusselt number within such geometry as a function of the considered parameters is proposed.

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“…For hydrothermal features of cooling methods, many investigations have assessed different micro HSs for laminar and turbulent flow employing air, water, and nanofluids as Newtonian and non‐Newtonian are commonly used. These cooling approaches have been developed by the following techniques—straight flat plate fins, wavy plate fins, vortex generator, grooved tubes, inclined solid ribs, porous media, two‐phase flow, and magnetic field . All these attempts are enhanced by the thermohydraulic performance of different HS designs for more reduction in the weight and volume of electronic, electrical, and solar systems.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional computational comparison of mini‐pinned heat sinks using different nanofluids: Part two—energy and exergy characteristics

Al‐damook

Alfellag

Khalil

2019

Heat Trans. Asian Res.

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The energy and exergy characteristics of 3D-pinned heat sink (HS) designs have been computationally compared as the second part of a three-part investigation. Different pin profiles, such as circular, square, triangular, strip and elliptic pins, and without pin HS are conducted with three different types of nanofluids-Al 2 O 3 -water, SiO 2 -water, and CuO-water for laminar forced convection. The concentrations of nanofluids vary from 0 to 5 vol% with different Reynolds numbers ranging between 100 and 1000. The finite volume method employing the SIMPLE algorithm for a computational solution is applied to solve the Navier-Stokes and energy equations. Four criterions studies are explained-energy efficiency, exergy loss, and exergy efficiency of HSs with pressure drop. The results showed that the highest energy and exergy efficiencies are nearly 76% and 57%, respectively, for elliptic-pinned HSs using pure water, while about 82% and 62% using 5 vol% of SiO 2 -water nanofluids. Besides, the elliptic-pinned HSs have a favorable reduction in the exergy loss, nearly 17% using 5 vol% of SiO 2 -water nanofluids. Subsequently, the elliptic-pinned HS is recommended to apply with pure water considering the development in pressure drop required. However, the elliptic-pinned HSs could be employed with 5 vol% of SiO 2 -water nanofluids regardless of the development in pressure drop required for thermal energy dissipation applications with more exergy efficiency and reduction of exergy loss. K E Y W O R D Sdifferent nanofluids, different pinned heat sinks, energy and exergy characteristics, exergy loss, thermal energy enhancement

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Experimental investigation of rheological behavior of the hybrid nanofluid of MWCNT–alumina/water (80%)–ethylene-glycol (20%)

Cited by 173 publications

References 47 publications

Heat transfer in the flow of blood‐gold Carreau nanofluid induced by partial slip and buoyancy

Heat transfer in the flow of blood‐gold Carreau nanofluid induced by partial slip and buoyancy

Magnetic field impact on nanofluid convective flow in a vented trapezoidal cavity using Buongiorno's mathematical model

Three‐dimensional computational comparison of mini‐pinned heat sinks using different nanofluids: Part two—energy and exergy characteristics

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