Flow Analysis of Hybridized Nanomaterial Liquid Flow in the Existence of Multiple Slips and Hall Current Effect over a Slendering Stretching Surface

Carbon nanotubes (CNTs) are favored materials in the manufacture of electrochemical devices because of their mechanical and chemical stability, good thermal and electrical conductivities, physiochemical consistency, and featherweight. With such intriguing carbon nanotubes properties in mind, the current research aims to investigate the flow of hybridized nano liquid containing MWCNTs (multi-wall carbon nanotubes) and SWCNTs (single-wall carbon nanotubes) across a slendering surface in the presence of a gyrotactic-microorganism. The temperature and solutal energy equation are modified with the impact of the modified Fourier and Fick’s law, binary chemical reaction, viscous dissipation, and joule heating. The slip conditions are imposed on the surface boundaries. The flow equations are converted into ODEs by applying similarity variables. The bvp4c approach is applied to tackle the coupled and extremely nonlinear boundary value problem. The outputs are compared with the PCM (Parametric continuation method) to ensure that the results are accurate. The influence of involved characteristics on energy distribution, velocity profiles, concentration, and microorganism field are presented graphically. It is noted that the stronger values of the wall thickness parameter and the Hartmann number produce a retardation effect; as a result, the fluid velocity declines for MWCNT and SWCNT hybrid nano liquid. Furthermore, the transport of the mass and heat rate improves with a higher amount of both the hybrid and simple nanofluids. The amount of local skin friction and the motile density of microorganisms are discussed and tabulated. Furthermore, the findings are validated by comparing them to the published literature, which is a notable feature of the present results. In this aspect, venerable stability has been accomplished.

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Study of Carbon Nanotubes with a Casson Fluid in a Vertical Channel of Porous Media under MHD and Dufour Effect

Journal of Scientific Research ◽

10.3329/jsr.v13i1.47458 ◽

2021 ◽

Vol 13 (1) ◽

pp. 31-45

Author(s):

S. Hazarika ◽

S. Ahmed

Keyword(s):

Carbon Nanotubes ◽

Volume Fraction ◽

Saturated Porous Medium ◽

Fluid Velocity ◽

Vertical Channel ◽

Casson Fluid ◽

Engine Oil ◽

Single Wall Carbon Nanotubes ◽

Physical Parameters ◽

The Impact

An analysis is conducted to investigate the problem of heat/mass transfer in MHD free convective flow of Casson-fluid in a vertical channel embedded with saturated porous medium past through carbon nanotubes in the form of single-wall carbon nanotubes (SWCNTs) and multiple-wall carbon nanotubes (MWCNTs) with engine oil as base fluid. In this article, the impact of CNT’s on velocity, temperature, shear stress and rate of heat transfer of the nanofluid has been investigated and studied graphically for the effects of different key physical parameters involved. The validity of this flow model is presented and is found satisfactory agreement with published results. The results state that, fluid velocity accelerates for greater values of Casson parameter and nanoparticles volume fraction, while thermal radiation (R) and heat generation (Q) assume a significant role in CNT's. Applications of this study arise in broad area of science and engineering such as thermal conductivity, energy storage, biomedical applications, air and water filtration, fibers and fabrics.

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Transient Free Convective Flow of CNT Water Nanofluid with Heat Transfer from a Moving Cylinder

Nanoscience &Nanotechnology-Asia ◽

10.2174/2210681210999200917113354 ◽

2020 ◽

Vol 10 ◽

Author(s):

C. Sridevi ◽

A. Sailakumari

Keyword(s):

Carbon Nanotubes ◽

Heat Generation ◽

Convective Flow ◽

Volume Fraction ◽

Vertical Cylinder ◽

Single Wall Carbon Nanotubes ◽

Free Convective Flow ◽

Multi Wall Carbon Nanotubes ◽

Moving Cylinder ◽

Variable Surface

Background: In this paper, transient two-dimensional laminar boundary layer viscous incompressible free convective flow of water based nanofluid with carbon nanotubes (CNTs) past a moving vertical cylinder with variable surface temperature is studied numerically in the presence of thermal radiation and heat generation. Methods: The prevailing partial differential equations which model the flow with initial and boundary conditions are solved by implicit finite difference method of Crank Nicolson type which is unconditionally stable and convergent. Results: Influence of Grashof number (Gr), nanoparticle volume fraction ( ), heat generation parameter (Q), temperature exponent (m), radiation parameter (N) and time (t) on velocity and temperature profiles are sketched graphically and elaborated comprehensively. Conclusion: Analysis of Nusselt number and Skin friction coefficient are also discussed numerically for both single wall carbon nanotubes (SWCNTs) and multi wall carbon nanotubes (MWCNTs).

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Effect of SWCNT-Tuball Paper on the Lightning Strike Protection of CFRPs and Their Selected Mechanical Properties

Materials ◽

10.3390/ma14113140 ◽

2021 ◽

Vol 14 (11) ◽

pp. 3140

Author(s):

Kamil Dydek ◽

Anna Boczkowska ◽

Rafał Kozera ◽

Paweł Durałek ◽

Łukasz Sarniak ◽

...

Keyword(s):

Mechanical Properties ◽

Carbon Nanotubes ◽

Electrical Conductivity ◽

Copper Foil ◽

Impact Resistance ◽

Mechanical Analysis ◽

Lightning Strike ◽

Single Wall Carbon Nanotubes ◽

Carbon Fibre Reinforced Polymer ◽

The Impact

The main aim of this work was the investigation of the possibility of replacing the heavy metallic meshes applied onto the composite structure in airplanes for lightning strike protection with a thin film of Tuball single-wall carbon nanotubes in the form of ultra-light, conductive paper. The Tuball paper studied contained 75 wt% or 90 wt% of carbon nanotubes and was applied on the top of carbon fibre reinforced polymer before fabrication of flat panels. First, the electrical conductivity, impact resistance and thermo-mechanical properties of modified laminates were measured and compared with the reference values. Then, flat panels with selected Tuball paper, expanded copper foil and reference panels were fabricated for lightning strike tests. The effectiveness of lightning strike protection was evaluated by using the ultrasonic phased-array technique. It was found that the introduction of Tuball paper on the laminates surface improved both the surface and the volume electrical conductivity by 8800% and 300%, respectively. The impact resistance was tested in two directions, perpendicular and parallel to the carbon fibres, and the values increased by 9.8% and 44%, respectively. The dynamic thermo-mechanical analysis showed higher stiffness and a slight increase in glass transition temperature of the modified laminates. Ultrasonic investigation after lightning strike tests showed that the effectiveness of Tuball paper is comparable to expanded copper foil.

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Analysis of single and multi-wall carbon nanotubes (SWCNT/MWCNT) in the flow of Maxwell nanofluid with the impact of magnetic dipole

Computational and Theoretical Chemistry ◽

10.1016/j.comptc.2021.113223 ◽

2021 ◽

Vol 1200 ◽

pp. 113223

Author(s):

Varun Kumar ◽

J.K. Madhukesh ◽

A.M. Jyothi ◽

B.C. Prasannakumara ◽

M. Ijaz Khan ◽

...

Keyword(s):

Carbon Nanotubes ◽

Magnetic Dipole ◽

Multi Wall Carbon Nanotubes ◽

Maxwell Nanofluid ◽

The Impact

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Application of Fractional Derivative Without Singular and Local Kernel to Enhanced Heat Transfer in CNTs Nanofluid Over an Inclined Plate

10.20944/preprints202004.0088.v1 ◽

2020 ◽

Author(s):

Muhammad Saqib ◽

Abdul Rahman Mohd Kasim ◽

Nurul Farahain Mohammad ◽

Dennis Ling Chuan Ching ◽

Sharidan Shafie

Keyword(s):

Heat Transfer ◽

Carbon Nanotubes ◽

Fractional Derivatives ◽

Saturated Porous Medium ◽

Convection Heat Transfer ◽

Heat Transfer Fluid ◽

Single Wall Carbon Nanotubes ◽

Inclined Plate ◽

Multi Wall Carbon Nanotubes ◽

Laplace Transform Technique

Nanofluids are a novel class of heat transfer fluid that plays a vital role in industries. In mathematical investigations, these fluids are modeled in terms of traditional integer-order partial differential equations (PDEs). It is recognized that traditional PDEs cannot decode the complex behavior of physical flow parameters and memory effects. Therefore, this article intends to study the mixed convection heat transfer in nanofluid over an inclined vertical plate via fractional derivatives approach. The problem in hand is modeled in connection with Atangana-Baleanu fractional derivatives without singular and local kernel having strong memory. The human blood is considered as base fluid dispersing carbon nanotube (CNTs) (single-wall carbon nanotubes (SWCNTs) and multi-wall carbon nanotubes(MWCNTs )) into it to form blood-CNTs nanofluid. The nanofluids are considered to flow in a saturated porous medium under the influence of an applied magnetic field. The exact analytical expressions for velocity and temperature profiles are acquired using the Laplace transform technique and plotted in various graphs. The empirical results indicate that the memory effect decreases with increasing fractional parameters in the case of both temperature and velocity profiles. Moreover, the temperature profile is higher for blood-SWCNTs by reason of higher thermal conductivity whereas, this trend is opposite in case of velocity profile due densities difference.

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EFFECT OF HEAT AND MASS TRANSFER AND THERMAL RADIATION ON A STEADY MHD CONVECTIVE FLOW WITH VISCOUS DISSIPATION AND SUCTION/INJECTION

Latin American Applied Research - An international journal ◽

10.52292/j.laar.2022.754 ◽

2022 ◽

Vol 52 (1) ◽

pp. 35-41

Author(s):

Silpisikha Goswami ◽

Kamalesh Kumar Pandit ◽

Dipak Sarma

Keyword(s):

Nusselt Number ◽

Thermal Radiation ◽

Temperature Profile ◽

Skin Friction ◽

Viscous Dissipation ◽

Sherwood Number ◽

Fluid Velocity ◽

Physical Parameters ◽

Flow Equations ◽

The Impact

Our motive is to examine the impact of thermal radiation and suction or injection with viscous dissipation on an MHD boundary layer flow past a vertical porous stretched sheet immersed in a porous medium. The set of the flow equations is converted into a set of non-linear ordinary differential equations by using similarity transformation. We use Runge Kutta method and shooting technique in MATLAB Package to solve the set of equations. The impact of non-dimensional physical parameters on flow profiles is analysed and depicted in graphs. We observe the influence of non-dimensional physical quantities on the Nusselt number, the Sherwood number, and skin friction and presented in tables. A comparison of the obtained numerical results with existing results in a limiting sense is also presented. We enhance radiation to observe the deceleration of fluid velocity and temperature profile for both suction and injection. While enhancing porosity parameter accelerates velocity whereas decelerates temperature profile. As the heat source parameter increases, the temperature of the fluid decreases for both suction and injection, it has been found. With the increasing values of the radiation parameter, the skin friction and heat transfer rate decreases. Increasing magnetic parameter decelerates the skin friction, Nusselt number, and Sherwood number.

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Impact of Lorentz Force on Unsteady Bio Convective Flow of Carreau Fluid across a Variable Thickness Sheet with Non-Fourier Heat Flux Model

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.387.474 ◽

2018 ◽

Vol 387 ◽

pp. 474-497 ◽

Cited By ~ 15

Author(s):

Kempannagari Anantha Kumar ◽

Bujula Ramadevi ◽

Vangala Sugunamma

Keyword(s):

Variable Thickness ◽

Heat Sink ◽

Convective Flow ◽

Fluid Velocity ◽

Source Parameters ◽

Weissenberg Number ◽

Transfer Coefficients ◽

Flow Equations ◽

The Impact ◽

Thickness Sheet

In this article, we examined the magnetohydrodynamic Cattaneo-Christov bio convective flow of Carreau liquid over a variable thickness sheet with irregular heat sink/source. The fluid motion is supposed to be time dependent and not turbulent. Firstly, proper transmutations are pondered to metamorphose the basic flow equations as ODE. The solution of these ODEs is procured by the sequential execution of R.K. and Shooting numerical treatments. The density of motile organisms, concentration, temperature and velocity distributions for dissimilar values of non-dimensional parameters are perused via graphs. Further, we analyzed the impact of same parameters on friction factor, local Nusselt number and the rate of mass transfer coefficients and presented in table. Results indicate that the distribution of the density of motile organisms is an increasing function of Peclet and Lewis numbers. Fluid velocity is proportional to the Weissenberg number. Also the space dependent heat sink/source parameters perform obligatory role in the mass and heat transport performance.

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A Stability Analysis of Solutions in Boundary Layer Flow and Heat Transfer of Carbon Nanotubes over a Moving Plate with Slip Effect

Energies ◽

10.3390/en11123243 ◽

2018 ◽

Vol 11 (12) ◽

pp. 3243 ◽

Cited By ~ 12

Author(s):

Nur Anuar ◽

Norfifah Bachok ◽

Ioan Pop

Keyword(s):

Heat Transfer ◽

Carbon Nanotubes ◽

Stability Analysis ◽

Skin Friction ◽

Single Wall Carbon Nanotubes ◽

Slip Effect ◽

Slip Parameter ◽

Moving Plate ◽

Multi Wall Carbon Nanotubes ◽

Flow And Heat Transfer

The flow and heat transfer characteristics of both single-wall and multi-wall carbon nanotubes (CNTs) with water and kerosene as base fluid on a moving plate with slip effect are studied numerically. By employing similarity transformation, governing equations are transformed into a set of nonlinear ordinary equations. These equations are solved numerically using the bvp4c solver in Matlab which is a very efficient finite difference method. The influence of numerous parameters such as nanoparticle volume fraction, velocity ratio parameter and first order slip parameter on velocity, temperature, skin friction and heat transfer rate are further explored and discussed in the form of graphical and tabular forms. The results reveal that dual solutions exist when the plate and free stream move in the opposite direction and slip parameter was found to widen the range of the possible solutions. However, skin friction coefficients decrease, whereas the heat transfer increases in the presence of slip parameter. Single-wall carbon nanotubes (SWCNTs) give higher skin friction and heat transfer compared to multi-wall carbon nanotubes (MWCNTs) due to the fact that they have higher density and thermal conductivity. A stability analysis is carried out to determine the stability of the solutions obtained.

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Application of Fractional Derivative Without Singular and Local Kernel to Enhanced Heat Transfer in CNTs Nanofluid Over an Inclined Plate

Symmetry ◽

10.3390/sym12050768 ◽

2020 ◽

Vol 12 (5) ◽

pp. 768 ◽

Cited By ~ 1

Author(s):

Muhammad Saqib ◽

Abdul Rahman Mohd Kasim ◽

Nurul Farahain Mohammad ◽

Dennis Ling Chuan Ching ◽

Sharidan Shafie

Keyword(s):

Heat Transfer ◽

Carbon Nanotubes ◽

Fractional Derivatives ◽

Saturated Porous Medium ◽

Convection Heat Transfer ◽

Heat Transfer Fluid ◽

Single Wall Carbon Nanotubes ◽

Inclined Plate ◽

Multi Wall Carbon Nanotubes ◽

Laplace Transform Technique

Nanofluids are a novel class of heat transfer fluid that plays a vital role in industries. In mathematical investigations, these fluids are modeled in terms of traditional integer-order partial differential equations (PDEs). It is recognized that traditional PDEs cannot decode the complex behavior of physical flow parameters and memory effects. Therefore, this article intends to study the mixed convection heat transfer in nanofluid over an inclined vertical plate via fractional derivatives approach. The problem in hand is modeled in connection with Atangana–Baleanu fractional derivatives without singular and local kernel with a strong memory. Human blood is considered as base fluid and carbon nanotube (CNTs) (single-wall carbon nanotubes (SWCNTs) and multi-wall carbon nanotubes (MWCNTs)) are dispersed into it to form blood-CNTs nanofluid. The nanofluid is considered to flow in a saturated porous medium under the influence of an applied magnetic field. The exact analytical expressions for velocity and temperature profiles are acquired using the Laplace transform technique and plotted in various graphs. The empirical results indicate that the memory effect decreases with increasing fractional parameters in the case of both temperature and velocity profiles. Moreover, the temperature profile is higher for blood SWCNTs because of higher thermal conductivity whereas this trend is found opposite in the case of velocity profile due to densities difference.

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MORPHOLOGY EFFECT OF Ni–Ag/CARBON NANOMATERIALS ON THEIR ELECTROCATALYTIC ACTIVITY FOR GLUCOSE OXIDATION

Surface Review and Letters ◽

10.1142/s0218625x16500591 ◽

2016 ◽

Vol 23 (06) ◽

pp. 1650059 ◽

Cited By ~ 3

Author(s):

RUIZHUO OUYANG ◽

WEIWEI LI ◽

YANG YANG ◽

WANGYAO ZHANG ◽

KAI FENG ◽

...

Keyword(s):

Carbon Nanotubes ◽

Surface Morphology ◽

Active Sites ◽

Carbon Nanomaterials ◽

Modified Electrodes ◽

Single Wall Carbon Nanotubes ◽

Composite Electrodes ◽

Ag Nps ◽

Multi Wall Carbon Nanotubes ◽

Ag Deposition

We presented here three carbon-nanomaterials-based modified glassy carbon electrodes (GCE) with Ni–Ag nanohybrid nanoparticles (NPs) deposited upon, including single-wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs) and the mesoporous carbons (MPCs), and compared their morphology effects on both Ni–Ag deposition quality and electrocatalytic performances toward Glu oxidation. After being deposited with Ni–Ag NPs, a homogenous surface with very small Ni–Ag NPs was obtained for Ni–Ag/SWCNTs/GCE, while heterogeneous, coarse surfaces with obvious embedment with large Ni–Ag particles were observed for both Ni–Ag/MWCNTs/GCE and Ni–Ag/MPC/GCE. All three modified electrodes were well characterized in terms of surface morphology, electron transfer rate, hydrophilicity, interference resistance, stability, electrocatalytic behaviors as well as practicability in real samples, based on which Ni–Ag/SWCNTs/GCE was always proved to be more advantageous over other two composite electrodes. Such advantage of Ni–Ag/SWCNTs/GCE was attributed to its desirable surface morphology good for Ni–Ag deposition and exposure of as many active sites as possible to Glu oxidation, leading to the extraordinary electrocatalytic performance.

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