scholarly journals Liquid Metal Flow Under Traveling Magnetic Field—Solidification Simulation and Pulsating Flow Analysis

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 532
Author(s):  
Evgeniy Shvydkiy ◽  
Egbert Baake ◽  
Diana Köppen
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Neutron Radiography ◽  
Metal Flow ◽  
Flow Analysis ◽  
Solidification Process ◽  
Electromagnetic Stirring ◽  
Pulsation Frequency ◽  
Conductive Liquid ◽  
Traveling Magnetic Field

Non steady applied magnetic field impact on a liquid metal has good prospects for industry. For a better understanding of heat and mass transfer processes under these circumstances, numerical simulations are needed. A combination of finite elements and volumes methods was used to calculate the flow and solidification of liquid metal under electromagnetic influence. Validation of numerical results was carried out by means of measuring with ultrasound Doppler velocimetry technique, as well as with neutron radiography snapshots of the position and shape of the solid/liquid interface. As a result of the first part of the work, a numerical model of electromagnetic stirring and solidification was developed and validated. This model could be an effective tool for analyzing the electromagnetic stirring during the solidification process. In the second part, the dependences of the velocity pulsation amplitude and the melt velocity maximum value on the magnetic field pulsation frequency are obtained. The ability of the pulsating force to develop higher values of the liquid metal velocity at a frequency close to the MHD resonance was found numerically. The obtained characteristics give a more detailed description of the electrically conductive liquid behaviour under action of pulsating traveling magnetic field.

scholarly journals Liquid Metal Flow under Traveling Magnetic Field: Solidification Simulation and Pulsating Flow Analysis

2020 ◽  
Author(s):  
Evgeniy Shvydkiy ◽  
Egbert Baake ◽  
Diana Köppen
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Neutron Radiography ◽  
Liquid Metals ◽  
Metal Flow ◽  
Flow Analysis ◽  
Electromagnetic Stirring ◽  
Pulsation Frequency ◽  
Conductive Liquid ◽  
Traveling Magnetic Field

Non steady applied magnetic field impact on a liquid metals has good prospects for industry. For a better understanding of heat and mass transfer processes under these circumstances, numerical simulations are needed. A combination of finite elements and volumes methods was used to calculate the flow and solidification of liquid metal under electromagnetic influence. Validation of numerical results was carried out by means of measuring with ultrasound Doppler velocimetry technique, as well as with neutron radiography snapshots of the position and shape of the solid/liquid interface. As a result of the first part of the work, a numerical model of electromagnetic stirring and solidification was developed and validated. This model could be an effective tool for analyzing the electromagnetic stirring during the solidification process. In the second part, the dependences of the velocity pulsation amplitude and the melt velocity maximum value on the magnetic field pulsation frequency are obtained. It was found numerically the ability of the pulsating force action to develop higher values of the liquid metal velocity at a frequency close to the MHD resonance. Obtained characteristics give a more detailed description of the electrically conductive liquid behaviour under action of pulsating traveling magnetic field.

Experimental Study of the Effect of Intermittent Electromagnetic Stirring On the Columnar-Equiaxed Transition In Sn–10wt.%Pb Alloy Solidification

2021 ◽  
Author(s):  
Abdelhafidh Abdelhakem ◽  
Lakhdar Hachani ◽  
Kader Zaidat ◽  
Ibrahim Sari ◽  
Yves Fautrelle
Keyword(s):  
Magnetic Field ◽  
Experimental Study ◽  
Thermal Field ◽  
Solidification Process ◽  
Electromagnetic Stirring ◽  
Transition Mechanism ◽  
Channel Segregation ◽  
Buoyancy Forces ◽  
Stabilizing Effect ◽  
Traveling Magnetic Field

Abstract Experimental analysis of stratification, electromagnetic stirring and solidification were carried out for two solidification experiments for a binary Sn-10wt.%Pb alloy. The objective of this study is to examine the effect of forced convection driven by an Intermittent Traveling Magnetic Field (I-TMF) on the solidification process. Several aspects were investigated, namely thermal field, macrostructure, and ?nally segregation behaviour, as well as, morphology. The effect of the both thermal and solutal stratification on the intensity of the flow is discussed yet, showed that stratification has a stabilizing effect for the flow, which can also slow the convective hydrodynamic movements generated by the buoyancy forces. The consequence of this stratification on macrosegregations and channel segregation, which develop during the solidification period, is experimentally analysed. Electromagnetic stirring by intermittent traveling magnetic promotes the development of the columnar-equiaxed transition mechanism (CET), more particularly the refinement of the grain size. The results illustrate, also, that electromagnetic stirring effectively diminish macrosegregations significantly, while remaining inactive for reducing channels segregation development.

A New Criterion for Optimization the Intermittently Reversing Direction Electromagnetic Stirring in Round Strands Continuous Casting

2013 ◽  
Vol 785-786 ◽  
pp. 1095-1098
Author(s):  
Zuo Sheng Lei ◽  
Xiao Hua Yang ◽  
Ru Jun Wei ◽  
Qi Gao
Keyword(s):  
Magnetic Field ◽  
Liquid Metal ◽  
Continuous Casting ◽  
Physical Simulation ◽  
Dynamic Pressure ◽  
Metal Flow ◽  
Electromagnetic Stirring ◽  
Doppler Velocity ◽  
Time Interval ◽  
Liquid Metal Flow

Liquid metal flow behavior in round strands continuous casting under intermittently reversing direction electromagnetic stirring was measured by ultrasonic Doppler velocity-meter in a physical simulation system in order to investigate the effects of time interval () of periodically reversed magnetic field on the spatial and temporal flow. The results show that under electromagnetic stirring with direction reserved magnetic field, theres a periodically change of the metal flow velocity and rotation direction with the periodically direction changing of the magnetic field. From both the experimental and mathematical model calculation results, it is found that when is nearly equal to the time required for the metal flow speeding to the maximum velocity from still and decreases to zero again, there is a critical value of the rate of dynamic pressure, which means the wash effect of the liquid metal flow. On this point, rate of dynamic pressure was proposed to be a criterion for optimization the processing of electromagnetic stirring.

Sign in / Sign up

Export Citation Format

Share Document