Abstract
The results of experimental and computational studies of the processes accompanying the melting of metal samples heated in air using induced currents are presented. The materials used for the experimental models—spheres and cylinders with a characteristic size of 10 mm—were pure iron, nonferrous metals, and various grades of steel. An unusual physical effect observed in experiments with iron and steels and associated with the intense release of sparks from the samples was studied: small brightly glowing metal droplets. A possible thermomechanical mechanism for the emission of droplets is proposed, based on the occurrence of excess melt pressure during metal melting inside the volume of the sample, limited by the resulting solid shell consisting of iron oxides. Numerical calculations were carried out, the results of which generally confirm the hypothesis presented.
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ACKNOWLEDGMENTS
The authors thank V.P. Monastyrsky for providing the calculation data on the thermophysical properties of ShKh15 grade steel and helpful discussion of the research results.
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This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.
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Based on materials from the Eighth Russian National Conference on Heat Transfer (RNCT-8), Moscow, October 17–22, 2022.
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Borodina, T.I., Glazkov, V.V., Ivochkin, Y.P. et al. Intensive Emission of Droplets during Melting of Metal Samples in a High-Frequency Inductor. High Temp 61, 235–241 (2023). https://doi.org/10.1134/S0018151X23020049
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DOI: https://doi.org/10.1134/S0018151X23020049