Electromagnetohydrodynamic Flow of Powell-Eyring Fluids in a Narrow Confinement

Li, F.-Q.; Jian, Yongjun; Xie, Zhiyong; Wang, L.

doi:10.1017/jmech.2016.75

Cited by 8 publications

(4 citation statements)

References 34 publications

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“…Thus, the rate of liquid stream can be enhanced by greatly using EMHD properties within channels. The influence of various effects on the EMHD flows has been reported by numerous investigators, which include Li et al adopted HPM and Chebyshev spectral method to obtain the approximate analytical and numerical results for EMHD flow of Powell‐Eyring liquid in thin passage. Zhao et al reported an important technical and scientific issues and EMHD marine oil film retrieval technology in the year 2015.…”

Section: Introductionmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

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This article addresses transient electromagnetohydrodynamic radiative squeezing flow due to convectively heated electromagnetic actuator. The transport analysis of heat and mass is explored considering the heat generation/ absorption and destructive species homogeneous reaction. Suitable transformations are applied on the mathematical model developed to convert governing partial differential equations to ordinary differential equations (ODEs). Spectral local linearization method (SLLM) is employed on the resultant nonlinear coupled ODEs to compute the numerical results. Influence of sundry physical quantities on heat mass transfer of squeezing flow characteristics are determined using graphs and tabular results. SLLM results exhibit that momentum and temperature improved with rise in squeezing and heat source parameters correspondingly. Momentum enhances at lower plate and detracts with rise in modified Hartmann number. For improved heat source parameter, the rate of heat transfer diminishes and is more significant for higher Prandtl number values.This investigation has relevance in disk style magnetic clutches, rolling elements, food processing, bearings, squeezing film pressure sensors, and flow rheostats. K E Y W O R D S convective conditions, electromagnetohydrodynamic, heat source/ sink, riga plate, SLLM, squeezing flow

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Section: Introductionmentioning

confidence: 99%

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Thumma¹,

Magagula

2019

Heat Trans. Asian Res.

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“…In order to achieve better fluid control in a microchannel, a method that combines the pressure, electric field, magnetic field and other driving sources as the driving form of microchannel has become widely used [10][11][12][13][14]. In recent years, many studies have tended to use magnetic fields to control the flow rate in microchannels [15,16]. In reality, due to the lack of precision in the actual manufacturing process, it is possible for defects to be present in the walls of microchannels.…”

Section: Introductionmentioning

confidence: 99%

The Streaming Potential of Fluid through a Microchannel with Modulated Charged Surfaces

Bian

Jian

2021

Micromachines

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In this paper, the effects of asymmetrically modulated charged surfaces on streaming potential, velocity field and flow rate are investigated under the axial pressure gradient and vertical magnetic field. In a parallel-plate microchannel, modulated charged potentials on the walls are depicted by the cosine function. The flow of incompressible Newtonian fluid is two-dimensional due to the modulated charged surfaces. Considering the Debye–Hückel approximation, the Poisson–Boltzmann (PB) equation and the modified Navier–Stokes (N-S) equation are established. The analytical solutions of the potential and velocities (u and v) are obtained by means of the superposition principle and stream function. The unknown streaming potential is determined by the condition that the net ionic current is zero. Finally, the influences of pertinent dimensionless parameters (modulated potential parameters, Hartmann number and slip length) on the flow field, streaming potential, velocity field and flow rate are discussed graphically. During the flow process and under the impact of the charge-modulated potentials, the velocity profiles present an oscillating characteristic, and vortexes are generated. The results show that the charge-modulated potentials are beneficial for the enhancement of the streaming potential, velocity and flow rate, which also facilitate the mixing of fluids. Meanwhile, the flow rate can be controlled through the use of a low-amplitude magnetic field.

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“…Additionally, it is predicted that the M-shaped velocity profiles established in the literature for Newtonian fluids become virtually U-shaped, provided that the Bingham number is sufficiently large. Other studies about the importance of considering the non-Newtonian behavior of fluids in MHD micropumps are discussed in references [25][26][27]. In the aforementioned investigations, different values of the magnetic, material, and physical parameters, in conjunction with complex rheological properties of the fluids, help control the flow field.…”

Section: Introductionmentioning

confidence: 99%

Viscous micropump of immiscible fluids using magnetohydrodynamic effects and a power-law conducting fluid

Lopez¹,

Roblero²,

Colin³

et al. 2021

Rev. Mex. Fís.

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Small-scale fluid transport methods have grown significantly in recent years, mainly in applications in microfluidic systems. Therefore, the present study analyzes the movement of two-layers of immiscible fluids within a parallel flat plates microchannel. The fluid layers are composed of a Newtonian fluid and a power-law fluid. The pumping is produced by magnetohydrodynamics effects that act on the non-Newtonian conducting fluid dragging the non-conducting Newtonian fluid by viscous forces. Under the consideration of a laminar, incompressible, and unidirectional flow, the dimensionless mathematical model is established by the momentum equations for each fluid, together with the corresponding boundary conditions at solid-liquid and liquid-liquid interfaces. The problem formulation is semi-analytically solved using the Newton-Raphson method. The results are presented as a function of the velocity profiles and flow rate, showing interesting behaviors that depend on the physical and electrical properties of each fluid and flow conditions via the dimensionless parameters such as the flow behavior index, a magnetic parameter related to Lorenz forces, the fluids viscosity ratios and the dimensionless liquid-liquid interface position. This work contributes to the understanding of the various immiscible non-conducting fluids pumping techniques that can be used in microdevices.

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Electromagnetohydrodynamic Flow of Powell-Eyring Fluids in a Narrow Confinement

Cited by 8 publications

References 34 publications

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

Transient electromagnetohydrodynamic radiative squeezing flow between two parallel Riga plates using a spectral local linearization approach

The Streaming Potential of Fluid through a Microchannel with Modulated Charged Surfaces

Viscous micropump of immiscible fluids using magnetohydrodynamic effects and a power-law conducting fluid

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