Transient entropy analysis of the magnetohydrodynamics flow of a Jeffrey fluid past an isothermal vertical flat plate

Kumar, M. Senthil; Reddy, G. Janardhana; Dalir, Nemat

doi:10.1007/s12043-018-1628-8

Cited by 15 publications

(4 citation statements)

References 41 publications

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“…So far, although many investigations have been carried out on the electromagnetic flow of Jeffrey fluid model [35][36][37][38][39][40][41][42][43], the choice of the applied electric field has unfortunately been limited to DC and AC fields. In reality, the above two fields are full of many limitations, for example, the unidirectional flow of DC field and the continuity and high loss of AC field [44].…”

Section: Introductionmentioning

confidence: 99%

Pulse electromagnetic flow of Jeffrey fluid in parallel plate microchannels

Li,

2023

Phys. Scr.

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This paper investigates the pulse electromagnetic flow of a Jeffery fluid between parallel plate microchannels, where the pulse is considered as a relatively stable and common rectangular pulse. The Laplace transform and residue theorem are employed to derive the analytical solutions for the velocity and volumetric flow rate of the pulse electromagnetic flow. Graphical representations depict the effects of several important parameters, including the Hartmann number , pulse width , relaxation time and retardation time on them. The study findings demonstrate that the Hartmann number plays a vital role in the investigation of pulse electromagnetic flow. During the first half-cycle of the pulse electric field, the magnitude of the velocity amplitude increases and then decreases with the Hartmann number . An interesting observation is that in the second half-cycle, larger Hartmann number values result in a decrease in velocity followed by a reverse increase. The profiles of velocity and volumetric flow rate exhibit oscillations over a relatively short period of time, then gradually reach a stable state with time and display periodic variation characteristics. Moreover, a larger pulse width leads to a longer variation period and more stable profiles of velocity and volumetric flow rate. For smaller Hartmann numbers , the magnitude of the volumetric flow rate amplitude grows with the relaxation time and reduces with the retardation time . However, as the Hartmann number increases, the influence of relaxation time and retardation time on the volumetric flow rate becomes significantly weakened, especially the retardation time .

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Section: Introductionmentioning

confidence: 99%

Pulse electromagnetic flow of Jeffrey fluid in parallel plate microchannels

Li,

2023

Phys. Scr.

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“…The steady magnetic field is applied to manage the framework of the material, refine non-metallic compounds and molten metals, cool unbroken filaments and strips, etc. The application of MHD occurrence has significant value in many technological fields such as medical science [9], direct numerical simulation of helical generator action [10], drag reduction within physical phenomena [11], and seawater propulsion [12]. Romig [13] investigated the effects of electric and magnetic fields on heat transmission to electrically conducting fluid.…”

Section: Introductionmentioning

confidence: 99%

Effects of Magnetohydrodynamics Flow on Multilayer Coatings of Newtonian and Non-Newtonian Fluids through Porous Inclined Rotating Channel

et al. 2022

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In this study, we investigated multilayer coatings fully developed with steady Newtonian and non-Newtonian fluids through parallel inclined plates. The channel was rotating about the y-axis with angular velocity Ω. The channel contained three regions; Region 1 and Region 3 were filled with Newtonian fluid, while Region 2 had Jeffrey fluid through a porous medium. The governing equations were formed by using Navier stokes and energy equations. The equations were coupled and were non-linear due to the involvement of Darcy’s dissipation terms. The systems of equations for Region 1 and Region 3 were solved analytically, while the equations of Region 2 were solved by using the regular perturbation method. The effects of governing parameters such as magnetic field, Grashof number, the ratio of heights, angle of inclination, and ratio of viscosities on velocity and temperature were investigated, and the results are presented graphically in this paper. It is noted that the increase in buoyancy force incorporated through the Grashof number and the angle of inclination enhanced the axial and transverse velocities and the temperature for the three layers. We found that the Nusselt number increases by increasing the couple stress parameter and magnetic field parameters, and skin friction decreases at the lower plate. The main observation is that temperature and both velocity profiles increased in Region 2 with the increase in the Jeffrey parameter.

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“…The study's main finding is that increasing the magnetic field and nanoparticle volume fraction parameters reduces skin friction while increasing the rate of heat transfer. Kumar et al [8] evaluated the flow and heat-transfer characteristics of hybrid ferrofluid caused by the stretching of an unsteady surface under the effect of an irregular heat source/sink. Simultaneous solutions for ferrofluids and hybrid ferrofluids are offered.…”

Section: Introductionmentioning

confidence: 99%

Impact of Joule heating and multiple slips on a Maxwell nanofluid flow past a slendering surface

Ahmad¹,

Khan²,

Nadeem³

et al. 2021

Commun. Theor. Phys.

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This manuscript presents a study of three-dimensional MHD Maxwell nanofluid flow across a slendering stretched surface with Joule heating. The impact of binary chemical reactions, heat generation, thermal radiation, and thermophoretic effect is also taken into consideration. The multiple slip boundary conditions are utilized at the boundary of the surface. The appropriate similarity variable is used to transfer the flow modeled equations into ODEs, which are numerically solved by the utilization of the MATLAB bvp4c algorithm. The involved parameter's impact on the concentration, velocity, and temperature distribution are scrutinized with graphs. The transport rates (mass, heat) are also investigated using the same variables, with the results reported in tabulated form. It is seen that the fluid relaxation, magnetic, and wall thickness characteristics diminish the velocities of fluid. Further, the velocity, concentration, and temperature slip parameters reduce the velocities of fluid, temperature, and concentration distribution. The results are compared to existing studies and showed to be in dependable agreement.

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Transient entropy analysis of the magnetohydrodynamics flow of a Jeffrey fluid past an isothermal vertical flat plate

Cited by 15 publications

References 41 publications

Pulse electromagnetic flow of Jeffrey fluid in parallel plate microchannels

Pulse electromagnetic flow of Jeffrey fluid in parallel plate microchannels

Effects of Magnetohydrodynamics Flow on Multilayer Coatings of Newtonian and Non-Newtonian Fluids through Porous Inclined Rotating Channel

Impact of Joule heating and multiple slips on a Maxwell nanofluid flow past a slendering surface

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