MATHEMATICAL MODELING OF TUNGSTEN MELTING IN EXPOSURE TO PULSED ELECTRON BEAM

G. G. Lazareva; Лазарева Г. Г.; A. S. Arakcheev; Аракчеев А. С.; V.A. Popov; Попов В. А.

doi:10.31857/S2686954322600537

MATHEMATICAL MODELING OF TUNGSTEN MELTING IN EXPOSURE TO PULSED ELECTRON BEAM

Authors: Lazareva G.G.¹, Arakcheev A.S.², Popov V.²
Affiliations:
1. Рeoples Friendship University of Russia
2. Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences
Issue: Vol 509, No 1 (2023)
Pages: 101-105
Section: COMPUTER SCIENCE
URL: https://journals.rcsi.science/2686-9543/article/view/142178
DOI: https://doi.org/10.31857/S2686954322600537
EDN: https://elibrary.ru/CQCAYT
ID: 142178

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Abstract

The paper is devoted to mathematical modeling of the melting process in a sample under the influence of a pulsed thermal load based on the solution of the two-phase Stefan problem. The free boundary is ignoring during the calculation, since the numerical model is based on the Samarsky approach. The calculation in axially symmetric geometry allowed us to show that about a quarter of the incident energy is consumed in the center of the melt region. This is five times more than estimates based on the solution of the one-dimensional heat equation give. Considering the evaporation of the substance a good correspondence between the calculated and experimental temperatures of the cooling surface and the rate of narrowing of the melt region is obtained. The results of mathematical modeling confirmed the existence of an evaporation cooling mode when tungsten is heated by an electron beam significantly above the melting threshold.

Keywords

mathematical modeling, tungsten evaporation, Stefan’s problem

References

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