Electromagnetically and thermally driven flow phenomena in electroslag welding
Electromagnetically and thermally driven flow phenomena in electroslag welding
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DOI：
10.1007/bf02654410
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发表时间：
1978-12
期刊：
影响因子：
--
通讯作者：
A. H. Dilawari;J. Szekely;T. Eagar
中科院分区：
文献类型：
--
作者：
A. H. Dilawari;J. Szekely;T. Eagar
通过麦克斯韦方程、湍流N-S方程和对流热平衡方程的表述，建立了电渣焊接过程的数学模型。在公式中，考虑了驱动熔渣和金属流动的电磁力和浮力。工作的主要发现是熔渣区的对流对换热过程有显著的影响。对于矩形几何结构，使用平板电极，流场由浮力驱动，循环流动不那么强烈，提高了过程的热效率。相反，对于线电极(近似为圆柱形)，流体是由电磁力驱动的，大部分热能被耗散到极板上。
Through the statement of Maxwell's equations, the turbulent Navier-Stokes equations, and the convective heat balance equation, a mathematical model has been proposed for the Electroslag Welding Process. In the formulation, allowance has been made for both electromagnetic and buoyancy forces for driving the slag and the metal flow. The principal finding of the work is that convection in the molten slag region has a marked effect on the heat transfer process. For a rectangular geometry, using plate electrodes, the flow field is driven by buoyancy forces, the circulating flow is less intense, and the thermal efficiency of the process is improved. In contrast, for wire electrodes (approximated by a cylindrical geometry) the flow is driven by electromagnetic forces and a substantial part of the thermal energy is dissipated to the plates.