Investigation of Thermal Transport in Multi-Shaped Cu Nanomaterial-Based Nanofluids

The unsteady flow of H2O saturated by tiny nanosized particles with various shapes (platelets, blades, cylinders, and bricks) over a thin slit is reported. For this novel analysis, the influences of the magnetic field and heat generation/absorption are incorporated into the governing model. The dimensionless nanofluid model is attained after the successful implementation of similarity transformations. Then, Runge-Kutta and homotopy analysis algorithms are implemented for mathematical analysis, and the results are obtained by varying the main flow parameters. A decrease in nanofluid motion is observed for a stronger magnetic field (M). Additionally, nanofluid temperature β(η) increases for higher values of M. Decreasing trends in the shear stresses Rex0.5CFx are observed for the unsteadiness parameter S, and this declines with stronger M. Similarly, the local heat transfer rate Rex−0.5Nux rises with the unsteady behavior of the fluid. It is observed that the nanofluid motion drops for variable thickness ( λ ) of the slit, whereas the motion becomes slower with stronger magnetic field effects (M).

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Heat transfer enhancement in H2O suspended by aluminium alloy nanoparticles over a convective stretching surface

Advances in Mechanical Engineering ◽

10.1177/1687814020942342 ◽

2020 ◽

Vol 12 (9) ◽

pp. 168781402094234

Author(s):

Adnan ◽

Syed Zulfiqar Ali Zaidi ◽

Umar Khan ◽

Naveed Ahmed ◽

Syed Tauseef Mohyud-Din ◽

...

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Aluminium Alloy ◽

Local Heat Transfer ◽

Local Heat ◽

Magnetic Field Effects ◽

Transfer Enhancement ◽

Convective Condition ◽

Self Similar ◽

Increasing Trends

The purpose of this work is to investigate the heat transport on water suspended by aluminium alloy nanomaterials. The analysis is conducted by incorporating the influence of imposed magnetic field and viscous dissipation over convective surface. The self-similar version of the model is treated numerically and the results for the flow field are presented. It is perceived that the velocity of AA7072-H2O and AA7075-H2O declines for stronger magnetic field effects. Due to convective condition, the temperature rises abruptly. Moreover, increasing trends in the local heat transfer rate are examined for higher Biot effects.

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The Numerical Investigation of the Heat Transport in the Nanofluids under the Impacts of Magnetic Field: Applications in Industrial Zone

Mathematical Problems in Engineering ◽

10.1155/2021/3138301 ◽

2021 ◽

Vol 2021 ◽

pp. 1-11

Author(s):

Adnan ◽

Umar Khan ◽

Naveed Ahmed ◽

Syed Tauseef Mohyud-Din ◽

Ilyas Khan ◽

...

Keyword(s):

Heat Transfer ◽

Local Heat Transfer ◽

Local Heat ◽

Shear Stresses ◽

Fluid Temperature ◽

Science Literature ◽

Electrically Conducting ◽

Flow Parameters ◽

Flow Investigation ◽

Prandtl Numbers

The dynamics of the nanofluid flow between two plates that are placed parallel to each other is of huge interest due to its numerous applications in different industries. Keeping in view the significance of such flow, investigation of the heat transfer in the Cu-H2O nanofluid is conducted between parallel rotating plates. For more significant results of the study, the squeezing effects are incorporated over the plates that are electrically conducting. The nondimensional flow model is then treated analytically (VPM), and the results are sketched against the preeminent flow parameters. The remarkable heat transfer in the nanofluid is noticed against the Eckert and Prandtl numbers, whereas the Lorentz forces oppose the fluid temperature. Furthermore, the shear stresses at the walls drop and the local heat transfer rate rises due to increasing flow parameters. Finally, to validate the study, a comparison is made with existing available science literature and noted that the presented results are aligned with them.

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Study of ferrofluid flow and heat transfer between cone and disk

Zeitschrift für Naturforschung A ◽

10.1515/zna-2021-0100 ◽

2021 ◽

Vol 0 (0) ◽

Author(s):

Anupam Bhandari

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Differential Equations ◽

Skin Friction ◽

Transfer Rate ◽

Local Heat Transfer ◽

Local Heat ◽

Disk Rotation ◽

Flow And Heat Transfer ◽

The Magnetic Field

Abstract This paper investigates the flow of water-based Fe3O4 ferrofluid flow and heat transfer due to rotating cone and disk under the influence of the external magnetic field. The similarity approach is used to transform the governing equations of ferrohydrodynamic flow into a set of nondimensional coupled differential equations. The nondimensional coupled differential equations are solved numerically through the finite element procedure. Effect of rotation of the disk, rotation of the cone, the intensity of the magnetic field, volume concentrations, and Prandtl number are analyzed on the velocity and temperature distributions. These effects are also observed on the skin friction coefficients and local heat transfer rate. The rotation of the disk, rotation of the cone, and the intensity of the magnetic field have a major impact on the velocity profiles, temperature profiles, skin friction coefficients, and local heat transfer rate.

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Homotopy Analysis Solution of Hydromagnetic Mixed Convection Flow Past an Exponentially Stretching Sheet with Hall Current

Mathematical Problems in Engineering ◽

10.1155/2012/454023 ◽

2012 ◽

Vol 2012 ◽

pp. 1-26 ◽

Cited By ~ 3

Author(s):

Mohamed Abd El-Aziz ◽

Tamer Nabil

Keyword(s):

Magnetic Field ◽

Mixed Convection ◽

Convection Flow ◽

Mixed Convection Flow ◽

Electrically Conducting ◽

Hall Parameter ◽

Homotopy Analysis ◽

Continuous Sheet ◽

Exponentially Stretching ◽

The Magnetic Field

The effect of thermal radiation on steady hydromagnetic heat transfer by mixed convection flow of a viscous incompressible and electrically conducting fluid past an exponentially stretching continuous sheet is examined. Wall temperature and stretching velocity are assumed to vary according to specific exponential forms. An external strong uniform magnetic field is applied perpendicular to the sheet and the Hall effect is taken into consideration. The resulting governing equations are transformed into a system of nonlinear ordinary differential equations using appropriate transformations and then solved analytically by the homotopy analysis method (HAM). The solution is found to be dependent on six governing parameters including the magnetic field parameterM, Hall parameterm, the buoyancy parameterξ, the radiation parameterR, the parameter of temperature distributiona, and Prandtl number Pr. A systematic study is carried out to illustrate the effects of these major parameters on the velocity and temperature distributions in the boundary layer, the skin-friction coefficients, and the local Nusselt number.

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Combined effect of free and forced convection on MHD flow in a rotating porous channel

International Journal of Mathematics and Mathematical Sciences ◽

10.1155/s0161171282000167 ◽

1982 ◽

Vol 5 (1) ◽

pp. 165-182 ◽

Cited By ~ 12

Author(s):

D. R. V. Prasada Rao ◽

D. V. Krishna ◽

Lokenath Debnath

Keyword(s):

Magnetic Field ◽

Forced Convection ◽

Fluid Flows ◽

Mhd Flow ◽

Combined Effect ◽

Porous Channel ◽

Shear Stresses ◽

Mass Rate ◽

Flow Parameters ◽

Free And Forced Convection

This paper gives a steady linear theory of the combined effect of the free and forced convection in rotating hydromagnetic viscous fluid flows in a porous channel under the action of a uniform magnetic field. The flow is governed by the Grashof numberG, the Hartmann numberH, the Ekman numberE, and the suction Reynolds numberS. The solutions for the velocity field, temperature distribution, magnetic field, mass rate of flow and the shear stresses on the channel boundaries are obtained using a perturbation method with the small parameterS. The nature of the associated boundary layers is investigated for various values of the governing flow parameters. The velocity, the temperature, and the shear stresses are discussed numerically by drawing profiles with reference to the variations in the flow parameters.

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Heat Transfer to MHD Oscillatory Viscoelastic Flow in a Channel Filled with Porous Medium

Physics Research International ◽

10.1155/2012/879537 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 8

Author(s):

Rita Choudhury ◽

Utpal Jyoti Das

Keyword(s):

Magnetic Field ◽

Heat Transfer ◽

Porous Medium ◽

Radiative Heat ◽

Saturated Porous Medium ◽

Transverse Magnetic ◽

Viscoelastic Flow ◽

Viscoelastic Parameter ◽

Flow Parameters ◽

The Magnetic Field

The combined effect of a transverse magnetic field and radiative heat transfer on unsteady flow of a conducting optically thin viscoelastic fluid through a channel filled with saturated porous medium and nonuniform walls temperature has been discussed. It is assumed that the fluid has small electrical conductivity and the electromagnetic force produced is very small. Closed-form analytical solutions are constructed for the problem. The effects of the radiation and the magnetic field parameters on velocity profile and shear stress for different values of the viscoelastic parameter with the combination of the other flow parameters are illustrated graphically, and physical aspects of the problem are discussed.

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Magnetospheric Processes Possibly Related to the Origin of Cosmic Rays

Symposium - International Astronomical Union ◽

10.1017/s0074180900074921 ◽

1981 ◽

Vol 94 ◽

pp. 373-391

Author(s):

Gerhard Haerendel

Keyword(s):

Magnetic Field ◽

Large Scale ◽

Small Scale ◽

Shear Stresses ◽

Acceleration Process ◽

Dayside Magnetopause ◽

Field Lines ◽

The Magnetic Field ◽

Auroral Particles

Two processes are discussed which violate the frozen-in condition in a highly conducting plasma, reconnection and the auroral acceleration process. The first applies to situations in which . It plays an important role in the interaction of the solar wind with the Earth's magnetic field and controls energy input into as well as energetic particle release from the magnetosphere. Detailed in situ studies of the process on the dayside magnetopause reveal its transient and small-scale nature. The auroral acceleration process occurs in the low magnetosphere (β « 1) and accompanies sudden releases of magnetic shear stresses which exist in large-scale magnetospheric-ionospheric current circuits. The process is interpreted as a kind of breaking. The movements of the magnetospheric plasma which lead to a relief of the magnetic tensions occur in thin sheets and are decoupled along the magnetic field lines by parallel electric potential drops. It is this voltage that accelerates the primary auroral particles. The visible arcs are then traces of the magnetic breaking process at several 1000 km altitude.

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LOCAL ORDER AND MAGNETIC FIELD EFFECTS ON THE ELECTRONIC PROPERTIES OF DISORDERED BINARY ALLOYS IN THE QUANTUM SITE PERCOLATION LIMIT

International Journal of Modern Physics B ◽

10.1142/s0217979299004057 ◽

1999 ◽

Vol 13 (32) ◽

pp. 3861-3877

Author(s):

D. F. DE MELLO ◽

G. G. CABRERA

Keyword(s):

Magnetic Field ◽

Electronic Properties ◽

Binary Alloys ◽

Finite Size ◽

Local Order ◽

Destructive Interference ◽

Magnetic Field Effects ◽

Site Percolation ◽

Field Effects ◽

The Magnetic Field

Electronic properties of disordered binary alloys are studied via the calculation of the average Density of States (DOS) in two and three dimensions. We propose a new approximate scheme that allows for the inclusion of local order effects in finite geometries and extrapolates the behavior of infinite systems following finite-size scaling ideas. We particularly investigate the limit of the Quantum Site Percolation regime described by a tight-binding Hamiltonian. This limit was chosen to probe the role of short range order (SRO) properties under extreme conditions. The method is numerically highly efficient and asymptotically exact in important limits, predicting the correct DOS structure as a function of the SRO parameters. Magnetic field effects can also be included in our model to study the interplay of local order and the shifted quantum interference driven by the field. The average DOS is highly sensitive to changes in the SRO properties and striking effects are observed when a magnetic field is applied near the segregated regime. The new effects observed are twofold: there is a reduction of the band width and the formation of a gap in the middle of the band, both as a consequence of destructive interference of electronic paths and the loss of coherence for particular values of the magnetic field. The above phenomena are periodic in the magnetic flux. For other limits that imply strong localization, the magnetic field produces minor changes in the structure of the average DOS.

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