Electromagnetic Stirring with Superimposed Travelling and Rotating Magnetic Fields

• Autorzy: Cramer A. , Pal J. , Gerbeth G.

Warianty tytułu

PL

Mieszanie elektromagnetyczne z nakładającymi się polem biegnącym i wirującym

• Języki publikacji: EN

Abstrakty

EN

Flow visualization and velocity measurements in a liquid metal flow were performed in order to study the combined action of a rotating and a travelling magnetic field. The combination of both fields, which is not necessarily a linear superposition, may give rise to an inherent three-dimensional constituent of the electromagnetic force distribution. As the Lorentz force may also become time-dependent, a quite intense mixing of metallic melts is achievable.

PL

Wizualizacja przepływu i pomiary prędkości przepływu ciekłego metalu zostały przeprowadzone celem przestudiowania łącznego działania wirującego i biegnącego pola magnetycznego. Kombinacja obu pól, która niekonieczne jest superpozycja liniową może spowodować, że rozkład sił elektromagnetycznych staje się trójwymiarowy. Skoro siła Lorenza może być także zależna od czasu można spodziewać się całkiem intensywnego mieszania kąpieli metalowej trójwymiarowe.

Słowa kluczowe

EN

electromagnetic processing of materials; liquid metal flow; combined magnetic field; stirring

PL

elektromagnetyczne przetwarzanie materiałów; przepływ ciekłego metalu; pole magnetyczne; mieszanie

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2008
• Tom: R. 84, nr 11
• Strony: 144--148
• Opis fizyczny: Bibliogr. 20 poz., rys., wykr.

Twórcy

autor

Cramer A.

autor

Pal J.

autor

Gerbeth G.

• Forschungszentrum Dresden-Rossendorf, P.O.Box 51 01 19, D-01314, Dresden,

Bibliografia

• [1] Tzavaras, A.A. and Brody, H.D., Electromagnetic stirring and continuous casting – Achievements, problems, and goals, J. Metals, 36 (1984), No. 3, 31-37.
• [2] Prescott, P.J., Incropera, P., and Gaskell, D.R., Convective transport phenomena and macrosegregation during solidification of a binary metal alloy. II. Experiments and comparisons with numerical predictions, J. Heat Trans., 116 (1994), 742-749.
• [3] Branover, H., Dardik, I., Golbraikh, E., Kapusta, A., Khavikin, M., Lesin, S., and Mikhailovich, B., Effect of modulated rotating magnetic field on molten metal flows, Proc. 5th Int. Conf. on Electromagnetic Processing of Materials, Sendai, Japan, 2006, 188-193.
• [4] Pal J., Eckert S., Zhang C., and Gerbeth G., Velocity measurements in metallic melts driven by AC magnetic fields in a square vessel, Proc. 5th Int. Conf. on Electromagnetic Processing of Materials, Sendai, Japan, 2006, 725-730.
• [5] Gelfgat, Yu., Krūmiņš, Yu., and Abricka M., Motion of an electrically conducting fluid in a cylindrical volume acted on by superimposed rotating and travelling magnetic fields, Magnetohydrodynamics, 35 (1999), No. 1, 1-12.
• [6] Abricka, M., Gelfgat, Yu., and Krūmiņš, Yu., Influence of combined electromagnetic fields on the heat/mass transfer in the Bridgman process, Energy Convers. Manag., 43 (2002), No. 3, 327-333.
• [7] Gelfgat, Yu., The use of combined magnetic fields for controlling the characteristics of motion and heat/mass transfer in electrically conduction liquid media, Proc. 4th Int. Conf. on Electromagnetic Processing of Materials, Lyon, France, 2003, 14-21.
• [8] Denisov, S., Khripchenko, S., Kolesnichenko, I., and Yudakov, A., MHD-stirrer for cylindrical moulds of continuous casting machines fabricated aluminium alloy ingots, Proc. 4th Int. Conf. on Electromagnetic Processing of Materials, Lyon, France, 2003, 178-183.
• [9] Taniguchi, S., Maitake, K., Okubo, M., Ando, T., and Ueno, K., Rotary stirring of liquid metals without free surface deformation by combination of rotational and vertical travelling magnetic fields - Development of hybrid stirrer, Proc. 4th Int. Conf. on Electromagnetic Processing of Materials, Lyon, France, 2003, 339-343.
• [10] Cramer, A., Eckert, S., Heinzelmann, Ch., Zhang C., and Gerbeth G., Efficient melt mixing due to the combined action of a rotating and a travelling magnetic field, Proc. 4th Int. Conf. on Electromagnetic Processing of Materials, Lyon, France, 2003, 359-365.
• [11] Stiller, J., Koal, K., Fraňa, K., and Grundmann, R.: Stirring of melts using rotating and travelling magnetic fields, Proc. 5th Int. Conf. on CFD in the Process Industries, Melbourne, Australia, 2006.
• [12] Cramer, A., Pal, J., and Gerbeth, G., Experimental investigation of a flow driven by a combination of a rotating and a traveling magnetic field, Phys. Fluids, 19 (2007), 118109.
• [13] Gorbachev, L. P., Nikitin, N. V., and Ustinov, A. L., Magnetohydrodynamic rotation of an electrically conductive liquid in a cylindrical vessel of finite dimensions, Magnetohydrodynamics, 10 (1974), 406-414.
• [14] Davidson, P. A. and Hunt, J. C. R., Swirling recirculating flow in a liquid metal column generated by a rotating magnetic field, J. Fluid Mech., 185 (1987), 67-106.
• [15] Grants, I. and Gerbeth, G., Stability of melt flow due to a travelling magnetic field in a closed ampoule, J. Crystal Growth, 269 (2004), 630-638.
• [16] Cramer, A., Eckert, S., Galindo, V., Gerbeth, G., Willers, B., and Witke, W., Liquid metal model experiments on casting and solidification processes, J. Mater. Sci., 39 (2004), 7285-7294.
• [17] Eckert, S., Cramer, A., and Gerbeth, G., Velocity measurement techniques for liquid metal flows, in Magnetohydrodynamics - Historical Evolution and Trends, edited by S. Molokov, R. Moreau, and H. K. Moffatt, Springer, Dordrecht, 2007, 275-294.
• [18] Cramer, A., Varshney, K., Gundrum, Th., and Gerbeth, G., Experimental study on the sensitivity and accuracy of electric potential local flow measurements, Flow Meas. Instrum., 17 (2005), 1-11.
• [19] Cramer, A., Gerbeth, G., Terhoeven, P., and Krätzschmar, A., Fluid velocity measurments in electro-vortical flows, Mat. & Manufacturing Processes, 19 (2004), No. 4, 665-678.
• [20] Koal, K. and Stiller, J., private communication, final data are submitted to be published in J. Turbul.