Review of magnetohydrodynamic pump applications

Al-Habahbeh, Osama M.; Al-Saqqa, M.; Safi, Mohannad; Khater, T. Abo

doi:10.1016/j.aej.2016.03.001

Cited by 123 publications

(54 citation statements)

References 29 publications

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“…Taking advantage of the chemical‐resistance and high conductivity of LIG, Khan and co‐workers have fabricated a magnetic hydrodynamic (MHD) pump using LIG as the working electrodes . The miniaturized MHD pump, which propels fluid by Lorentz force to accomplish various tasks such as transport, mixing and segregation, has biofluidics applications . Saline fluids used in the MHD pump, such as sea water, urine, and blood, are corrosive to many materials of construction, therefore the electrode materials need to be corrosion‐resistant.…”

Section: Applicationsmentioning

confidence: 99%

Laser‐Induced Graphene: From Discovery to Translation

2018

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direct laser scribing with a commercial CO 2 infrared laser system as found in most machine shops, the product being termed laser-induced graphene (LIG). [15] LIG exhibits high surface area (≈340 m 2 g −1 ), high thermal stability (>900 °C), and excellent conductivity (5-25 S cm −1 ). [15] The entire process can be performed in ambient air without any solvents, thereby making it exceedingly attractive for industrial use. This protocol combines the 3D graphene synthesis with writing into a single step process that has stimulated research ranging from fundamental studies on the transformation process to the development of a large variety of engineering applications. [15][16][17][18][19][20][21][22] Here, starting from the discovery of LIG, we will first emphasize strategies for the engineering of chemical, physical, and electronic properties of LIG; specifically, the regulation of laser parameters, atmosphere, and substrates to control the porosity, composition, and morphology of the LIG. The controllable synthesis of LIG and ease in property engineering makes it a versatile material in various applications including in sustainable energy conversions such as water splitting and fuel cell technology, [20,23] supercapacitors (SCs) for energy storage, [15,16,[24][25][26] sensors for sound, photon, strain, and chemicals detection, [27][28][29][30][31][32][33] and microfluidics [34][35][36] that are applicable to the laboratory and industrial scales, as outlined. Finally, the future advancement, such as the development of flexible electronics and biodegradable devices, will be discussed.Laser-induced graphene (LIG) is a 3D porous material prepared by direct laser writing with a CO 2 laser on carbon materials in ambient atmosphere. This technique combines 3D graphene preparation and patterning into a single step without the need for wet chemical steps. Since its discovery in 2014, LIG has attracted broad research interest, with several papers being published per month using this approach. These serve to delineate the mechanism of the LIG-forming process and to showcase the translation into many application areas. Herein, the strategies that have been developed to synthesize LIG are summarized, including the control of LIG properties such as porosity, composition, and surface characteristics, and the advancement in methodology to convert diverse carbon precursors into LIG. Taking advantage of the LIG properties, the applications of LIG in broad fields, such as microfluidics, sensors, and electrocatalysts, are highlighted. Finally, future development in biodegradable and biocompatible materials is briefly discussed. Laser-Induced Graphene

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Section: Applicationsmentioning

confidence: 99%

Laser‐Induced Graphene: From Discovery to Translation

2018

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“…Concluding the data processing, Figure 9(b) shows the final 2-D velocity profile (blue dash-dot line) in comparison with the 2-D velocity model simulation (green dash-dot line). The difference between target profile (TP) and the final profile (FP) obtained was evaluated through root-mean-square error (RMSE) using equation (9), obtaining a successful velocity RMSE value of 207 nm/s…”

Section: Technique For 2-d Velocity Profile Enhancementmentioning

confidence: 99%

Magnetohydrodynamic velocity profile measurement for microelectromechanical systems micro-robot design

Flores-Fuentes

Valenzuela-Delgado

Caceres-Hernandez

et al. 2019

International Journal of Advanced Robotic Systems

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The development of microelectromechanical systems based on magnetohydrodynamic for micro-robot applications requires precise control of the micro-flow behavior. The micro-flow channel design and its performance under the influence of the Lorentz force is a critical challenge, the mathematical model of each magnetohydrodynamic device design must be experimentally validated before to be employed in the fabrication of microelectromechanical systems. For this purpose, the present article proposes the enhancement of a particle image velocimetry measurement process in a customized machine vision system. The particle image velocimetry measurements are performed for the micro-flow velocity profile mathematical model validation of a magnetohydrodynamic stirrer prototype. Data mining and filtering have been applied to a raw measurement database from the customized machine vision system designed to evaluate the magnetohydrodynamic stirrer prototype. Outlier’s elimination and smoothing have been applied to raw data to approximate the particle image velocimetry measurements output to the velocity profile mathematical model to increase the accuracy of a customized machine vision system for two-dimensional velocity profile measurements. The accurate measurement of the two-dimensional velocity profile is fundamental owing to the requirement of future enhancement of the customized machine vision system to construct the three-dimensional velocity profile of the magnetohydrodynamic stirrer prototype. The presented methodology can be used for measurement and validation in the design of microelectromechanical systems micro-robot design and any other devices that require micro-flow manipulation for tasks such as stirring, pumping, mixing, networking, propelling, and even cooling.

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“…Therefore, well estimate of the channel's MHD development length has a significant role to design pertinent systems and solve practical problems in many industrial and scientific fields [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Although researches about the hydrodynamic development length and suggesting the more accurate relation for development length have been studied until now [24][25][26][27][28], but the attention about the magnetohydrodynamic development length and presenting the correlation for predicting it is not noticeable.…”

Section: Introductionmentioning

confidence: 99%

The influence of magnetic field on the fluid flow in the entrance region of channels: analytical/numerical solution

Taheri

2019

SN Appl. Sci.

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The present paper investigates the steady laminar development flow of a Newtonian incompressible electrically conducting fluid in a plane channel subjected to a uniform transverse external magnetic field. In order to solve the problem, the analytical integral momentum method and numerical finite volume method (FVM) are conducted. In integral momentum solution, the Pohlhausen's fourth-degree velocity profile is assumed. Applying the boundary conditions leads to the appearance of a new dimensionless parameter named auxiliary parameter (AP). It is shown that the value of AP depends on the magnitude of magnetic intensity and the pressure gradient. For each specified value of AP, distinct velocity distribution and as a result, a correlation for computing the magnetic development length is obtained. Besides, the FVM is applied to solve the same problem and the correlation for estimating the magnetic development length is obtained. It can be concluded that for a particular engineering application of magnetohydrodynamics channel flows, the associated value of AP can be determined by the numerical investigation. The results of numerical solution are compared with the analytical results and it can be concluded that the results for AP = − 6 are in agreement with the numerical results. Further, the effect of Hartmann and Reynolds number on the magnetic development length and Lorentz force are illustrated. It was shown that as the Hartmann number increases, the value of development length and Lorentz force are reduced. KeywordsChannel · Integral momentum method · Magnetic development length · Magnetohydrodynamics · Numerical method List of symbols a Half width of channel (m) AP Auxiliary parameter B 0 External magnetic field (T) Ha Hartmann number P Pressure (Pa) Re Reynolds number u x-Component of the velocity (m/s) U Inlet velocity (m/s) u c Potential core velocity (m/s) v y-Component of the velocity (m/s) x Coordinate in the direction of flow (m) x em /D Dimensionless MHD development length y Coordinate in the direction normal to flow (m) ρ Density (kg/m 3 ) σ Electrical conductivity (Ω m) −1 δ Boundary layer thickness (m) υ Kinematic viscosity (m/s 2 ) η Arbitrary variable

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Review of magnetohydrodynamic pump applications

Cited by 123 publications

References 29 publications

Laser‐Induced Graphene: From Discovery to Translation

Laser‐Induced Graphene: From Discovery to Translation

Magnetohydrodynamic velocity profile measurement for microelectromechanical systems micro-robot design

The influence of magnetic field on the fluid flow in the entrance region of channels: analytical/numerical solution

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