An experimental study on the rheological behavior of hybrid Tungsten oxide (WO3)-MWCNTs/engine oil Newtonian nanofluids

Aghahadi, Mohammad; Niknejadi, Mohammadreza; Toghraie, Davood

doi:10.1016/j.molstruc.2019.07.080

Cited by 114 publications

(24 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aly et al 30 theoretically and numerically studied the MHD stagnation point flow over stretching sheet of hybrid nanofluid with dissipation and slip effects and observed a relationship between MHD and rate of heat transfer. Aghahadi et al 31 inspected the rheological performance of tungsten oxide-engine oil nanofluid at various concentration and temperature and found a linear relationship between applied shear stress and shear rate. Nagoor et al 32 numerically explicated the influence of various physical constraints on velocity and temperature fields for Darcy-Forchheimer hybrid nanofluid in rotating frame by using Lobatto IIIA method.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Shoaib

Raja

Sabir

et al. 2020

Sci Rep

170

View full text Add to dashboard Cite

This research investigates the heat and mass transfer in 3-D MHD radiative flow of water based hybrid nanofluid over an extending sheet by employing the strength of numerical computing based Lobatto IIIA method. Nanoparticles of aluminum oxide (Al2O3) and silver (Ag) are being used with water (H2O) as base fluid. By considering the heat transfer phenomenon due to thermal radiation effects. The physical flow problem is then modeled into set of PDEs, which are then transmuted into equivalent set of nonlinear ODEs by utilizing the appropriate similarity transformations. The system of ODEs is solved by the computational strength of Lobatto IIIA method to get the various graphical and numerical results for analyzing the impact of various physical constraints on velocity and thermal profiles. Additionally, the heat transfers and skin friction analysis for the fluid flow dynamics is also investigated. The relative errors up to the accuracy level of 1e-15, established the worth and reliability of the computational technique. It is observed that heat transfer rate increases with the increase in magnetic effect, Biot number and rotation parameter.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Shoaib

Raja

Sabir

et al. 2020

Sci Rep

170

View full text Add to dashboard Cite

show abstract

“…6, consequently displaying a non-Newtonian behavior with shear thinning characteristics. Several mathematical models like Casson Model [39], Hershel-Buckley Model [40], Bingham Plastic model [41], and Power law model, etc. have been developed to describe the rheological behavior of fluids.…”

Section: Resultsmentioning

confidence: 99%

Effect of particle concentration and temperature on the thermo-physical properties of ethylene glycol–water mixture based boron nitride nanofluids

et al. 2020

View full text Add to dashboard Cite

Present article focusses on the thermal and rheological characteristics of ethylene glycol-water mixture (volume = 60/40) based boron nitride (h-BN) nanofluids measured at different volume concentrations (0.5-2 vol% h-BN) between temperatures 30-60 °C. X-ray diffraction and TEM analysis have confirmed the hexagonal structure of h-BN nanoparticles and the size range of the nanoparticles is within 90-170 nm. To optimize the ultrasonication time, the thermal conductivity of h-BN nanofluids has been monitored after each 30 min of sonication until a maximum thermal conductivity increase is achieved. The thermal conductivity of h-BN nanofluids shows an increasing trend with respect to particle concentration. Also, the thermal conductivity enhancement exhibits a temperature independent nature. The viscosity studies carried out over a shear rate of 0.612-122 s −1 revealed an increasing trend with the increasing concentration of h-BN loading. For all the volume concentrations, at lower shear rates, the viscosity initially decreased, displaying a non-Newtonian nature, and with a further increase in shear rate, the viscosity stays constant exhibiting a Newtonian nature. Based on the experimental outcomes, a correlation is introduced. The correlation showed a strong agreement with the current results, with an R 2 value of 0.99.

show abstract

“…It has been reported that HNFs show superior thermal conductivity as well as performance than mono nanofluids 17,18,21‐24 . Many research studies have been reported on hybrid nanofluids to study the impact on thermophysical properties including rheological properties, 25‐28 thermophysical properties, 29‐31 optical properties, and performance evaluation of heat transfer systems 32 including solar collectors 33‐35 …”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that HNFs show superior thermal conductivity as well as performance than mono nanofluids. 17,18,[21][22][23][24] Many research studies have been reported on hybrid nanofluids to study the impact on thermophysical properties including rheological properties, [25][26][27][28] thermophysical properties, [29][30][31] optical properties, and performance evaluation of heat transfer systems 32 including solar collectors. [33][34][35] Diverse range of mono and hybrid nanofluids based on Therminol-55 oil, thermal fluids, water, and ethylene glycol doped with metallic nanoparticles and their oxides have been studied for use in solar collectors for varied temperature range.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

2020

View full text Add to dashboard Cite

Summary Hybrid nanofluids with Therminol‐55 as base fluid and TiO2 and Al2O3 as nano additives are investigated for parabolic trough collectors. Stable mono nanofluids based on Therminol‐55 with Al2O3 and TiO2 nanoparticles, and hybrid Al2O3–TiO2 nanopowder as additives are prepared by the two‐step method. Oleic acid has been made as a surfactant. The impact of nanoparticle content and fluid temperature on thermal conductivity was studied using the transient hot‐wire technique. Thermal conductivity exhibited an increase with an increase in both temperature and nanoparticle concentration. Al2O3–TiO2 Therminol‐55 hybrid nanofluids exhibit the highest increase of 33.5% in thermal conductivity followed by 27.06% in Al2O3–Therminol‐55, and lowest rise of 21% is found in TiO2–Therminol‐55 nanofluids. Synergetic effect of Al2O3 and TiO2 nanoparticles, increased Brownian motion, and filling of vacant spaces by smaller‐sized TiO2 nanoparticles in Al2O3–TiO2 hybrid nanofluids lead to effective thermal network for enhanced thermal conductivity. Maximum thermal conductivity of 0.15 W/m‐K is observed in the case of hybrid Al2O3–TiO2 Therminol‐55 nanofluid with 0.5 wt% concentration. Augmented thermal conductivity of HNF's leads to the efficient photothermal conversion in concentrating solar collectors. Further, a correlation for thermal conductivity with variation in nanoparticle content and the fluid temperature is proposed with R2 = 0.92.

show abstract

An experimental study on the rheological behavior of hybrid Tungsten oxide (WO3)-MWCNTs/engine oil Newtonian nanofluids

Cited by 114 publications

References 25 publications

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Effect of particle concentration and temperature on the thermo-physical properties of ethylene glycol–water mixture based boron nitride nanofluids

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors

Contact Info

Product

Resources

About

An experimental study on the rheological behavior of hybrid Tungsten oxide (WO3)-MWCNTs/engine oil Newtonian nanofluids

Cited by 114 publications

References 25 publications

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Numerical investigation for rotating flow of MHD hybrid nanofluid with thermal radiation over a stretching sheet

Effect of particle concentration and temperature on the thermo-physical properties of ethylene glycol–water mixture based boron nitride nanofluids

Experimental study on thermal conductivity of mono and hybrid Al 2 O 3 –TiO 2 nanofluids for concentrating solar collectors

Contact Info

Product

Resources

About

Experimental study on thermal conductivity of mono and hybrid Al ₂ O ₃ –TiO ₂ nanofluids for concentrating solar collectors