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电渣重熔过程中的电磁场和Joule热分析王芳1,李宝宽1(1.辽宁省沈阳市东北大学材料与冶金学院)摘 要:以电渣重熔工艺中电极,渣池和钢锭为研究对象,建立了能够考虑集肤效应的三维谐波电磁场有限元模型,采用Maxwell方程,Lorentz定律和Joule定律分析了渣,钢锭和电极的磁场,电磁力,电流密度和Joule热功率密度的分布.模拟结果与测量的电渣重熔系统外部空气的磁感应强度吻合良好,证明了本模型和计算过程的可靠性.计算结果表明:在电极和钢锭内,电流主要集中在外表面,电流沿轴向方向;在渣池内,由于渣的电导率低,电流分布发生改变,主要集中在电极端头处;电磁力的最大值出现在接近渣池上表面渣内的电极附近;而Joule热的最大值是在电极底部与渣的交界处;当频率大于35 Hz时,电极和钢锭内都出现了涡流;当电极浸......
that the function of the inductor is to induce high current densities in the channels and heat the metal through Joule heating [3-4]. The principle of a double channel induction furnace is based on the effect...J. Cent. South Univ. Technol. (2009) 16: 0851-0856 DOI: 10.1007/s11771-009-0141-0 Numerical analysis on Joule heating of double-loop channel induction furnaces ZHAO Tao(赵 涛)1, ZHOU Jie-min(周孑民......
of electric current of 6.70 A/mm2 on the B2+O lamellar microstructure were investigated for Ti2AlNb alloy sheet. The stable temperature denoted a balanced state between the Joule heat... of the rectangular sample. Figure 2(a) shows the relationship between the temperature and heating time in the central point of S1, and Figure 2(b) shows the equilibrium temperatures between Joule heat......
Peristaltic flow in an asymmetric channel with convective boundary conditions and Joule heatingAbbasi Fahad Munir1, Hayat Tasawar1, 2, Ahmad Bashir2(1. Department of Mathematics, Quaid-I-Azam.... Joule heating effect on the thermal equation is retained. Analytic solutions for stream function and temperature are constructed. Numerical integration is carried out for pressure rise per wavelength......
transfer characteristics of magneto-hydrodynamic Casson fluid flow between two parallel plates under the influence of thermal radiation, internal heat generation or absorption and Joule dissipation.... The present numerical solutions are compared with previously published results and show the good agreement. Key words: squeezing flow; thermal radiation; heat generation or absorption; Casson fluid; Joule......
transit flow at different output powers Fig.4 Photo of inductor for experiments 2.2.2 Input heat The input heat was Joule heating by current induced in the channels. Joule heating can... from low load trials of a 400 kW inductor. The results of numerical simulations, such as the temperature and Joule heating rate, show reasonable correlation with experimental data. The results indicate......
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to electric path versus time at 823 K During SPS, the existence of plasma still remains doubtful, and on the other hand, the Joule heating is thought to be a promising heat generation mechanism... transformation kinetics was improved from 0.207 before mill to 4.56×10-3. Besides, this work provided more details for the generation of Joule heating. The resistance offered to the electric path......
force, viscous dissipation, Joule heating, and magnetic field. Many researchers examined the flow and heat transfer over permeable surfaces in different cases. However, they utilized the regular fluid... ARTICLE J. Cent. South Univ. (2019) 26: 1099-1115 DOI: https://doi.org/10.1007/s11771-019-4074-y Heat transfer and nanofluid flow over a porous plate with radiation and slip boundary conditions......
on. Figure 1 Geometric model of: 2.2 Description of eddy current field model The heat of melting of the induction cladding comes from the Joule heat due to current induction and analysis... is the electric current density, A/m2; ρ1 is the electric charge density, C/m2. In the above formula, displacement current density D/t is not the main cause of joule heat, and electric current density J......
