Properties of glycerol and ethylene glycol mixture based SiO2-CuO/C hybrid nanofluid for enhanced solar energy transport

2018 ◽  
Vol 179 ◽  
pp. 118-128 ◽  
Author(s):  
Suleiman Akilu ◽  
Aklilu Tesfamichael Baheta ◽  
Mior Azman M.Said ◽  
Alina Adriana Minea ◽  
K.V. Sharma
Keyword(s):  
Solar Energy ◽  
Ethylene Glycol ◽  
Energy Transport ◽  
Hybrid Nanofluid

Thermal augmentation in solar aircraft using tangent hyperbolic hybrid nanofluid: A solar energy application

2021 ◽  
pp. 0958305X2110366
Author(s):  
Wasim Jamshed
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Ethylene Glycol ◽  
Numerical Technique ◽  
Surface Friction ◽  
Hybrid Nanofluid ◽  
Heat Transfer Efficiency ◽  
Control Factors ◽  
Tangent Hyperbolic Fluid ◽  
Energy And Momentum

The major source of heat from the sun is solar energy, with enormous use of photovoltaic technology, solar power plates, photovoltaic lights and pumping solar water. This time is about the analysis of solar radiation and how the efficiency of solar aircraft may be improved by using solar radiation and nanotechnology. The study is intended to develop analyses of solar aircraft hybrid nanofluid transfer via parabolic trough surface collector solar wings. Solar radiative flow was named the heat source. The heat transfer efficiency of the wings is evaluated for various phenomena such as a slanted magnetic field, Joule heating, play heat and thermal radiative flow. The entropy production study was carried out in the instance of the tangent hyperbolic fluid. The modelled energy and momentum formulas were controlled with the well-established Keller box numerical technique. This work consists of ethylene glycol standard fluid with two differing types of nanosolid particles copper and silver. Different control factors for velocities, shear stress and temperature are addressed and shown in the figures and tables as well as surface friction and heat transport rate. In terms of thermal transfer, the efficacy of the aviation wings with thermal radiation amplification and changeable thermal conduction parameters is enhanced. Hybrid nanofluid is an ideal source of heat transmission compared to conventional nanofluids. Silver–copper/ethylene glycol thermal efficiency is reduced between 2.6% and 4.4% than copper–ethylene glycol nanofluid.

Nanoscale energy transport of inclined magnetized 3D hybrid nanofluid with Lobatto IIIA scheme

Heat Transfer ◽  
2021 ◽  
Author(s):  
Assad Ayub ◽  
Adil Darvesh ◽  
Gilder C. Altamirano ◽  
Zulqurnain Sabir
Keyword(s):  
Energy Transport ◽  
Hybrid Nanofluid

scholarly journals Effect of Magnetic Field on the Forced Convective Heat Transfer of Water–Ethylene Glycol-Based Fe3O4 and Fe3O4–MWCNT Nanofluids

2021 ◽  
Vol 11 (10) ◽  
pp. 4683
Author(s):  
Areum Lee ◽  
Chinnasamy Veerakumar ◽  
Honghyun Cho
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Field Strength ◽  
Ethylene Glycol ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Hybrid Nanofluid ◽  
Forced Convective Heat Transfer ◽  
The Magnetic Field

This paper discusses the forced convective heat transfer characteristics of water–ethylene glycol (EG)-based Fe3O4 nanofluid and Fe3O4–MWCNT hybrid nanofluid under the effect of a magnetic field. The results indicated that the convective heat transfer coefficient of magnetic nanofluids increased with an increase in the strength of the magnetic field. When the magnetic field strength was varied from 0 to 750 G, the maximum convective heat transfer coefficients were observed for the 0.2 wt% Fe3O4 and 0.1 wt% Fe3O4–MWNCT nanofluids, and the improvements were approximately 2.78% and 3.23%, respectively. The average pressure drops for 0.2 wt% Fe3O4 and 0.2 wt% Fe3O4–MWNCT nanofluids increased by about 4.73% and 5.23%, respectively. Owing to the extensive aggregation of nanoparticles by the external magnetic field, the heat transfer coefficient of the 0.1 wt% Fe3O4–MWNCT hybrid nanofluid was 5% higher than that of the 0.2 wt% Fe3O4 nanofluid. Therefore, the convective heat transfer can be enhanced by the dispersion stability of the nanoparticles and optimization of the magnetic field strength.

MoS2-SiO2/EG hybrid nanofluid transport in a rotating channel under the influence of a strong magnetic dipole (Hall effect)

2020 ◽  
Vol 16 (6) ◽  
pp. 1595-1616
Author(s):  
N. Mahato ◽  
S.M. Banerjee ◽  
R.N. Jana ◽  
S. Das
Keyword(s):  
Heat Transfer ◽  
Ethylene Glycol ◽  
Shape Factor ◽  
Hall Current ◽  
Hybrid Nanofluid ◽  
Shear Stresses ◽  
Content Type ◽  
Nanoparticle Shape ◽  
Hall Parameter ◽  
Rotating Channel

PurposeThe article focuses on the magnetohydrodynamic (MHD) convective flow of MoS2-SiO2 /ethylene glycol (EG) hybrid nanofluid. The effectiveness of Hall current, periodically heating wall and shape factor of nanoparticles on the magnetized flow of hybrid nanocomposite molybdenum disulfide- silicon dioxide (MoS2-SiO2) suspended in ethylene glycol (EG) in a vertical rotating channel under the influence of strong magnetic dipole (Hall effect) and thermal radiation is assessed. One of the channel walls has an oscillatory temperature gradient. Four different shapes (i.e. brick, cylinder, platelet and blade) of nanoparticles disseminated in base fluid (EG) are considered for simulation of the flow.Design/methodology/approachThe analytical solution of governing equations has been presented. Influences of emerging physical parameters on the velocity and temperature profiles, the shear stresses and the rate of heat transfer are pointed out and discussed via graphs and tables.FindingsThe analysis revealed that Hall parameter has suppressing behavior on the velocity profiles within the rotating channel. The impact of nanoparticle shape factor advances the temperature characteristics significantly in the rotating channel. Brick-shape nanoparticles put up relatively low-temperature distribution in the rotating channel. The Hall parameter reduces the amplitudes of the shear stresses at the channel wall. However, the radiation parameter enhances the amplitude of the rate of heat transfer at the channel wall.Social implicationsThe important technical advantage of hybrid composition of nanoparticles as a drug carrier is its stability, high thermal conductivity, high load carrying capacity, etc. The proposed model may be beneficial in biomedical engineering, automobile parts, mineral and cleaning oils manufacturing, rubber and plastic industries.Originality/valueTo the best of our knowledge, there is little or no report on the aspects of assessment of the effectiveness of Hall current and nanoparticle shape factor on an MHD flow and heat transfer of an electrically conducting MoS2-SiO2/EG ethylene glycol-based hybrid nanofluid confined in a vertical channel with periodically varying wall temperature subject to a rotating frame. The present work furnishes a robust benchmark for the dynamics of nanofluids.

scholarly journals Thermal conductivity enhancement in gold decorated graphene nanosheets in ethylene glycol based nanofluid

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
M. C. Mbambo ◽  
M. J. Madito ◽  
T. Khamliche ◽  
C. B. Mtshali ◽  
Z. M. Khumalo ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ethylene Glycol ◽  
Base Fluid ◽  
Graphene Nanosheets ◽  
Synthesis Method ◽  
Particle Diameter ◽  
Laser Wavelength ◽  
Hybrid Nanofluid ◽  
Average Particle ◽  
Conductivity Enhancement

Abstract We report on the synthesis and thermal conductivity of gold nanoparticles (AuNPs) decorated graphene nanosheets (GNs) based nanofluids. The GNs-AuNPs nanocomposites were synthesised using a nanosecond pulsed Nd:YAG laser (wavelength = 1,064 nm) to ablate graphite target followed by Au in ethylene glycol (EG) base fluid to obtain GNs-AuNPs/EG hybrid nanofluid. The characterization of the as-synthesised GNs-AuNPs/EG hybrid nanofluid confirmed a sheet-like structure of GNs decorated with crystalline AuNPs with an average particle diameter of 6.3 nm. Moreover, the AuNPs appear smaller in the presence of GNs which shows the advantage of ablating AuNPs in GNs/EG. The thermal conductivity analysis in the temperature range 25–45 °C showed that GNs-AuNPs/EG hybrid nanofluid exhibits an enhanced thermal conductivity of 0.41 W/mK compared to GNs/EG (0.35 W/mK) and AuNPs/EG (0.39 W/mK) nanofluids, and EG base fluid (0.33 W/mK). GNs-AuNPs/EG hybrid nanofluid displays superior enhancement in thermal conductivity of up to 26% and this is due to the synergistic effect between AuNPs and graphene sheets which have inherent high thermal conductivities. GNs-AgNPs/EG hybrid nanofluid has the potential to impact on enhanced heat transfer technological applications. Also, this work presents a green synthesis method to produce graphene-metal nanocomposites for various applications.

scholarly journals Dynamics of Ethylene Glycol-based Graphene and Molybdenum Disulphide Hybrid Nanofluid Over a Stretchable Surface With Velocity and Thermal Slip Conditions

2021 ◽  
Author(s):  
Syed M. Hussain
Keyword(s):  
Flow Field ◽  
Ethylene Glycol ◽  
Thermal Radiation ◽  
Skin Friction ◽  
Heat Transport ◽  
Transport Rate ◽  
Hybrid Nanofluid ◽  
Thermal Slip ◽  
Molybdenum Disulphide ◽  
Flow Parameters

Abstract In this research study, numerical and statistical explorations are accomplished to capture the flow features of the dynamics of ethylene glycol-based hybrid nanofluid flow over an exponentially stretchable sheet with velocity and thermal slip conditions. Physical insight of viscous dissipation, heat absorption and thermal radiation on the flow-field is scrutinized by dissolving the nanoparticles of Molybdenum disulphide (MoS2) and graphene into ethylene glycol. The governing mathematical model is transformed into the system of similarity equations by utilizing the apt similarity variables. The numerical solution of resulting similarity equations with associated conditions are obtained employing three-stages Lobatto-IIIa-bvp4c-solver based on a finite difference scheme in MATLAB. The effects of emerging flow parameters on the flow-field are enumerated through various graphical and tabulated results. Additionally, to comprehend the connection between heat transport rate and emerging flow parameters, a quadratic regression approximation analysis on the numerical entities of local Nusselt numbers and skin friction coefficients is accomplished. The findings disclose that the suction and thermal radiation have an adverse influence on the skin friction coefficients and heat transport rate. Further, a slight augmentation in the thermal slip factor causes a considerable variation in the heat transport rate in comparison to the radiation effect.

scholarly journals Heat Transfer Analysis of Cu and Al 2 0 3 Dispersed in Ethylene Glycol as a Base Fluid over a Stretchable Permeable Sheet of MHD Thin-film Flow

2021 ◽  
Author(s):  
Zeeshan Khan ◽  
Ilyas Khan
Keyword(s):  
Thin Film ◽  
Heat Transfer ◽  
Differential Equations ◽  
Ethylene Glycol ◽  
Film Thickness ◽  
Film Flow ◽  
Heat Transfer Analysis ◽  
Hybrid Nanofluid ◽  
Thin Film Flow ◽  
Thin Film Thickness

Abstract The process of thin films is commonly utilized to improve the surface characteristics of materials. A thin film helps to improve the absorption, depreciation, flexibility, lighting, transport, and electromagnetic efficiency of a bulk material medium. Thin film treatment can be especially helpful in nanotechnology. As a result, the current study investigates the computational process of heat relocation analysis in a thin-film MHD flow embedded in hybrid nanoparticles, which combines the spherical copper and alumina dispersed in ethylene glycol as the conventional heat transfer Newtonian fluid model over a stretching sheet. Important elements such as thermophoresis and Brownian movement are used to explain the characteristics of heat and mass transfer analysis. Nonlinear higher differential equations (ODEs) were attained by transforming partial differential equations (PDEs) into governing equations when implementing the similarity transformation technique. The resulting nonlinear ODEs have been utilized by using the homotopy analysis method (MHD). The natures of the thin-film flow and heat transfer through the various values of the pertinent parameters: unsteadiness, nanoparticle volume fraction, thin-film thickness, magnetic interaction and intensity suction/injection are deliberated. The approximate consequences for flow rate and temperature distributions and physical quantities in terms of local skin friction and Nusselt number were obtained and analysed via graphs and tables. As a consequence, the suction has a more prodigious effect on the hybrid nanofluid than on the injection fluid for all the investigated parameters. It is worth acknowledging that the existence of the nanoparticles and MHD in the viscous hybrid nanofluid tends to enhance the temperature profile but decay the particle movement in the thin-film flow. It is perceived that the velocity and temperature fields decline with increasing unsteadiness, thin-film thickness and suction/injection parameters.

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