THERMAL SCIENCE

International Scientific Journal

External Links

NUMERICAL SIMULATION OF THE FORMATION AND THE DRIPPING OF DROPLET IN THE ELECTROSLAG REMELTING PROCESS

ABSTRACT
Based on the magnetohydrodynamic module of the commercial computational fluid dynamics software FLUENT, a 3-D mathematical model was developed to describe the multi-field coupling phenomenon in the electroslag remelting process. The model predicted value is in good agreement with the experimental measurements. The simulation results show that, during the melt dripping process, the resistance of the electroslag remelting system is decreasing while the current density and velocity, as well as the temperature are increasing gradually. The maximum value of current density, electromagnetic force, and velocity appears when the melt droplet detaches and the quality of large droplets fall into the slag-metal interface. The maximum value of the current density is increased by almost one order of magnitude. The maximum value of the electromagnetic force and velocity increased by 2.5 and 4.7 times, respectively. The maximum value of Joule heating and temperature appears when the droplets fall into the slag-metal interface. The maximum value of the Joule heating and temperature increased for about 174.7% and 26.8%, respectively, when compared with the moment of the melt droplet formation.
KEYWORDS
PAPER SUBMITTED: 2014-11-17
PAPER REVISED: 2015-03-29
PAPER ACCEPTED: 2015-04-22
PUBLISHED ONLINE: 2015-06-07
DOI REFERENCE: https://doi.org/10.2298/TSCI141117070L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE 3, PAGES [1241 - 1250]
REFERENCES
  1. Mitchell, A., Joshi, S., The thermal characteristics of the electroslag process. Metallurgical Transactions, 4(1973), 3, pp. 631-642
  2. Li, B.K., Wang, F., Tsukihashi, F., Current Magnetic Field and Joule Heating in Electroslag Remelting Processes. ISIJ International, 52(2012), 7, pp. 1289-1295
  3. Dilawari, A.H., Szekely, J., A mathematical model of slag and metal flow in the ESR Process. Metallurgical Transactions B, 8(1977), 1, pp. 227-236
  4. Choudhary, M., Szekely, J., The modeling of pool profiles, temperature profiles and velocity fields in ESR systems. Metallurgical Transactions B, 11(1980), 3, pp. 439-453
  5. Choudhary, M., Szekely, J., The effect of temperature dependent electrical conductivity on flow and temperature fields in slags in ESR systems. Metallurgical Transactions B, 12(1981), 2, pp. 418-421
  6. Choudhary, M., Szekely, J., Medovar, B.I., The velocity field in the molten slag region of esr systems: a comparison of measurements in a model system with theoretical predictions. Metallurgical Transactions B, 13(1982), 1, pp. 35-43
  7. Dilawari, A.H., Szekely, J., Heat transfer and fluid flow phenomena in electroslag refining. Metallurgical Transactions B, 9(1978), 1, pp. 77-87
  8. Dilawari, A.H., Szekely, J., Eagar, T.W., Electromagnetically and thermally driven flow phenomena in electroslag welding. Metallurgical Transactions B, 9(1978), 3, pp. 371-381
  9. Jardy, A., Ablitzer, D., Wadier, J.F., Magnetohydronamic and thermal behavior of electroslag remelting slags. Metallurgical Transactions B, 22(1991), 1, pp. 111-120
  10. Mitchell, A., Hernandez-Morales, B., Electromagnetic stirring with alternating current during electroslag remelting. Metallurgical Transactions B, 21(1990), 4, pp. 723-731
  11. Kharicha, A., Ludwig, A., Wu, M., Shape and stability of the slag/melt interface in a small dc ESR process. Materials Science and Engineering: A, 413(2005), pp. 129-134
  12. Weber, V., Jardy, A., Dussoubs, B., A Comprehensive Model of the Electroslag Remelting Process: Description and Validation. Metallurgical and Materials Transactions B, 40(2009), 3, pp. 271-280
  13. Ballantyne, A.S., Mitchell, A., Modeling of Ingot Thermal Fields in Consumable Electrode Remelting Process. Ironmaking Steelmaking, 4(1977), 4, pp. 222-239
  14. Biro, O., Preis, K., On the use of the magnetic vector potential in the finite-element analysis of three-dimensional eddy currents. IEEE Transactions on Magnetics, 25(1989), 4, pp. 3145-3159

© 2017 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence