Coupled numerical simulation on electromagnetic field and flow field in the round billet mould with electromagnetic stirring

Wang, B-X.; Chen, W.; Chen, Y.; Feng, Y-P.

doi:10.1179/1743281214y.0000000201

Cited by 22 publications

(15 citation statements)

References 6 publications

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“…The numerical modelling envisages an exact behaviour of different physical parameters such as fluid flow, fields and temperature, and also establishes interdependency between the variables (Trindade et al , 2017, Yin et al , 2018). Coupled numerical simulation (Wang et al , 2015) was done to investigate the field and flow profile for the round billet. Further investigation has been carried out for detailed numerical analysis and performance assessment of linear induction motor (LIM)-based stirrer under different operating conditions (Liu, 2008,2010).…”

Section: Introductionmentioning

confidence: 99%

Analytical modelling of electromagnetic field and performance investigation of a rectangular linear electromagnetic stirrer

Das

Dhabarde²,

Raju

2021

COMPEL

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Purpose The purpose of this study is to develop a novel rectangular linear induction motor as an electromagnetic stirrer (EMS) using analytical followed by a numerical approach. The rectangular linear electromagnetic stirrer (RLEMS) is mainly developed for rectangular slab and billet as the end product. Design/methodology/approach A two-dimensional analytical approach for evaluating flux density distribution within the mold is established for RLEMS structure. Subsequently, the average stirring force within the mold is estimated from those field variables. The paper presents an analytical and numerical model for calculating the stirring force and counters the end and edge effects of linear-type EMS. Magnetic field and force profile within the mold due to polyphase rectangular stator distribution has been done with the help of Maxwell’s equation with appropriate boundary conditions by using Fourier transform and inverse Fourier transform. Subsequently, a numerical study has been carried out using a coupled thermal and electromagnetic model. Findings The present study investigates the physical phenomena during the solidification process because of an induced electromagnetic field and is able to extract all the electromagnetic field variables under different operating conditions, and, subsequently, provides an insight into the actual happening within the mold. Originality/value It provides the analytical method for solving the stirring force of the proposed new RLEMS structure by addressing the smooth and efficient variation of field and velocity profile near the corner of the mold and improves the quality of end product.

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Section: Introductionmentioning

confidence: 99%

Analytical modelling of electromagnetic field and performance investigation of a rectangular linear electromagnetic stirrer

Das

Dhabarde²,

Raju

2021

COMPEL

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“…With the maturation of electromagnetic stirring technology, it has been widely used in the production of large-bloom continuous casting. According to the metallurgical effect and the installation position of electromagnetic agitator, it is usually divided into mold electromagnetic stirring (M-EMS), strand electromagnetic stirring (S-EMS), electromagnetic stirring (F-EMS) and combinations (M + S-EMS, M + F-EMS, M + S + F-EMS) [1,2]. Among them, M-EMS generally adopts the method of rotating stirring to promote the absorption of inclusions by protective slag, improve the purity of casting billets, reduce the central defects and improve the quality of casting billets.…”

Section: Introductionmentioning

confidence: 99%

The Simulation and Optimization of an Electromagnetic Field in a Vertical Continuous Casting Mold for a Large Bloom

Zhang

et al. 2020

Metals

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The electromagnetic model of a large-bloom continuous casting was established to simulate the magnetic field. The model 3600 digital, high-precision, three-dimensional Gaussian meter was used to measure the internal magnetic field of mold electromagnetic stirring (M-EMS). The distribution of simulated magnetic field was basically consistent with that of the measured magnetic field; the accuracy of electromagnetic stirring model was verified. With the increase of current frequency, the electromagnetic force first increases and then decreases; when the current frequency is 9 Hz, the electromagnetic force reaches its maximum value. A bipolar electromagnetic stirring model is proposed; the influence of current intensity and distance were investigated. With the increase of current intensity of lower mold electromagnetic stirring (M-EMSB), the internal magnetic intensity of upper mold electromagnetic stirring (M-EMSA) gradually increases, and the middle region is gradually filled by magnetic field. With the increase of the distance, the range of the low-intensity magnetic field expands. When the current intensity of the M-EMSB is 320 A, and the distance is 400 mm, an 8 mT uniform magnetic field in the range of 1.2 m is formed. Compared with the traditional continuous casting electromagnetic agitator, the center equiaxial crystal of bipolar electromagnetic agitator increases from 30.3% to 49.5%.

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“…Its use allows to contactlessly increase velocity of metal flows, accelerating the process of homogenizing its temperature and chemical composition. Degree of electromagnetic field influence on the liquid metal is related both to parameters of supply current (its value and frequency) and to geometric dimensions of the stirrer and mixer (Wang et al, 2015;Maurya and Jha, 2017). One of the main factors which reduce the effectiveness of electromagnetic field influence on a melt is a large air gap (Pedchenko and Gelfgat, 2002).…”

Section: Introductionmentioning

confidence: 99%

Shape optimization of soft magnetic composite inserts for electromagnetic stirrer with traveling magnetic field

Bolotin

Shvidkii

Sokolov

et al. 2020

COMPEL

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Purpose The purpose of this paper is to search optimal shape of soft magnetic composite-based inserts used to compensate the working gap between the liquid metal and the induction stirrer in metallurgical installations. Design/methodology/approach The study was based on numerical simulation of electromagnetic processes in frequency domain. To optimize inserts shape, the Nelder–Mead method was used. The maximum of integral electrodynamic force along x-axis was chosen as the objective function. All simulations were performed in finite element software package Comsol Multiphysics. Findings Optimal inserts shape was determined, at which the value of integral electrodynamic force along x-axis increased by 20% from 692 to 792 N. Originality/value Magnetic concentrators based on soft magnetic composite materials have long been used in high-frequency systems; at the same time, their use in low-frequency systems has not been previously considered in detail. The study of the shape effect of concentrators on the effectiveness of electromagnetic field in a liquid metal in a three-dimensional formulation was carried out for the first time.

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Coupled numerical simulation on electromagnetic field and flow field in the round billet mould with electromagnetic stirring

Cited by 22 publications

References 6 publications

Analytical modelling of electromagnetic field and performance investigation of a rectangular linear electromagnetic stirrer

Analytical modelling of electromagnetic field and performance investigation of a rectangular linear electromagnetic stirrer

The Simulation and Optimization of an Electromagnetic Field in a Vertical Continuous Casting Mold for a Large Bloom

Shape optimization of soft magnetic composite inserts for electromagnetic stirrer with traveling magnetic field

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