Magnetohydrodynamic Instability of the Surface Metal Layer Melted by Pulsed Current

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
S. D. Samuilov, I. P. Shcherbakov, Y. N. Bocharov, S. I. Krivosheev, S. G. Magazinov
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引用次数: 0

Abstract

It is shown that the results of dispersion of various materials in the mode of pulsed current action correspond to theoretical estimates of the wavelength of MHD instability. The sizes of the obtained metal grain, including refractory ones, correspond to the modes of exposure, and their microstructure corresponds to the conditions of formation. Modeling in the Comsol Multiphysics environment at a qualitative level revealed the influence of the thickness of the surface layer of the current flow on the dynamics of the formation and separation of liquid metal droplets. It is shown that one of the operating factors that create and increase instabilities is the heterogeneity of the distribution of Lorentz forces in the current supply zone.

Abstract Image

脉冲电流熔化的表面金属层的磁流体力学不稳定性
结果表明,各种材料在脉冲电流作用模式下的分散结果符合 MHD 不稳定性波长的理论估计值。获得的金属晶粒(包括难熔晶粒)的尺寸与暴露模式相对应,其微观结构与形成条件相对应。在 Comsol Multiphysics 环境中进行的定性建模揭示了电流表面层厚度对液态金属液滴形成和分离动力学的影响。结果表明,产生和增加不稳定性的运行因素之一是电流供应区洛伦兹力分布的不均匀性。
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来源期刊
Technical Physics
Technical Physics 物理-物理:应用
CiteScore
1.30
自引率
14.30%
发文量
139
审稿时长
3-6 weeks
期刊介绍: Technical Physics is a journal that contains practical information on all aspects of applied physics, especially instrumentation and measurement techniques. Particular emphasis is put on plasma physics and related fields such as studies of charged particles in electromagnetic fields, synchrotron radiation, electron and ion beams, gas lasers and discharges. Other journal topics are the properties of condensed matter, including semiconductors, superconductors, gases, liquids, and different materials.
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