Numerical analysis of the electromagnetic force for design optimization of a rectangular direct current electromagnetic pump

Lee, Geun Hyeong; Kim, Hee Reyoung

doi:10.1016/j.net.2018.04.010

Cited by 11 publications

(2 citation statements)

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“…Lithium has been used in many industrial applications. [32][33][34][35] Also, the current intensity inside the solenoid has to be determined, which is not defined in the solver Table 1.…”

Section: Solution Methodologymentioning

confidence: 99%

Evaluation of separation point in a divergent channel in the presence of non-uniform magnetic field

Moghimi

Jamie

Taheri

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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Due to the pressure gradient increasing downstream, the boundary layer separation phenomena may occur on the divergent channel flow wall. Still, several methods have been applied to control or postponed the separation. Exerting a magnetic field on the fluid flow is one solution. In the present research, we aim to investigate the impact of magnetic fields on the separation location in a divergent channel numerically. Hence, the finite volume method using the OpenFOAM CFD toolbox is employed, and a code for 2-D divergent channel flow under a non-uniform magnetic field is developed. The obtained results have been validated in comparison with previous studies. The results are presented for a test case of the channel with divergence half-angle equals 2.5°, 30 cm length, and 2 cm inlet height. It is demonstrated when Ha increases from 0 to 2, the separation points for liquid lithium fluid flow with Re = 208.33 are postponed from 12.93 cm to 23.18 cm. Moreover, it is shown that the separation phenomena disappear entirely for the Ha value of more than 3.

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“…Lithium has been used in many industrial applications. [32][33][34][35] Also, the current intensity inside the solenoid has to be determined, which is not defined in the solver Table 1.…”

Section: Solution Methodologymentioning

confidence: 99%

Evaluation of separation point in a divergent channel in the presence of non-uniform magnetic field

Moghimi

Jamie

Taheri

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

show abstract

“…Their fluid was molten lithium. To achieve the maximum pressure (1.5 MPa), they optimized electric parameters and pump dimensions at 200 °C using a numerical method [19]. Wang et al experimentally created a closed cycle by the means of permanent magnets; these magnets applied force to the fluid in two stages.…”

Section: Introductionmentioning

confidence: 99%

An electromagnetic arrayed pump to create arbitrary velocity profiles in fluid

et al. 2021

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The present paper is conducted to develop a new structure of an electromagnetic pump capable of controlling the magnetic field in a rectangular channel. Common electromagnetic pumps do not create uniform velocity profiles in the cross-section of the channel. In these pumps, an M-shape profile is created since the fluid velocity in the vicinity of the walls is higher than that in its center. Herein, the arbitrary velocity profiles in the electromagnetic pump are generated by introducing an arrayed structure of the coils in the electromagnetic pump and implementing 3D numerical simulation in the finite element software COMSOL. The dimensions of the rectangular channel are 5.5 × 150 mm2. Moreover, the magnetic field is provided using a core with an arrayed structure made of low-carbon iron, as well as five couples of coils. 20% NaoH solution is utilized as the fluid (conductivity: 40 S/m). The arrayed pump is fabricated and experimentally created an arbitrary velocity profile. The pressure of the pump in every single array is 12 Pa and the flow rate is equal to 3375 mm3/s. According to the results, there is a good agreement between the experimental test carried out herein and the simulated models.Article highlights This is the first time that the idea of arrayed electromagnetic pump is presented. This pump uses a special arrayed core with coils; by controlling the current of each coil and the direction of the currents, the magnetic field under the core could be adjusted. By changing the magnetic field at any position in the width of the channel, the Lorentz force alters, which leads to different velocity and pressure profiles. Using COMSOL multiphysics software, the electromagnetic pump was simulated in real size compared to the experimental model. Subsequently, the simulation model was verified and different velocity profiles were generated by activation and deactivation of different coils. The pressure and velocity curves and contours were extracted. The experimental setup was manufactured and assembled. NaOH solution was utilized as the fluid. Afterwards, different modes of coil activations were investigated and the pressure and velocity profiles of the pump were calculated.

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