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Scalar and vector basis functions have been developed that permit accurate modeling of singularities in electromagnetic fields at geometric edges and corners. This review attempts to organize the different types of functions, to summarize what philosophies have been used in their development, and help identify future work needed in this area.
This paper presents a finite element solution for three-dimensional isothermal flow for DC arc furnace where low frequency AC component is added. Electrodes of the furnace are connected with independent supply sources. Current densities, magnetic flux densities, force densities and flow of molten metal are investigated in the case of two different furnace constructions. Methodology for supply source...
This paper reviews some solving procedures for unbounded electromagnetic field problems, based on the integral representation of the unknown boundary condition on the truncation fictitious boundary. Three problems are considered: electrostatic, time-harmonic skin effect, and time-harmonic scattering in unbounded domains. These problems are formulated, respectively, by means of the hybrid FEM-BEM,...
AC electric arc furnaces (EAFs) highly reduce power quality of the network by generating disturbances such as flicker and harmonics. These disturbances are due to the nonlinear electromagnetic and thermal field behaviors of the AC arcs. Analysis of these nonlinear behaviors is required for improving power quality in the network. This paper presents a three-dimensional finite element modeling of the...
Boundary element approaches are developed to evaluate the human exposure to low-frequency electromagnetic fields, estimating the current density distribution inside the body. The reference man proposed in the IEC Standards is adopted to model the human body. The validation is performed by comparison with analytical and finite-element solutions. Various exposure conditions, typical in electric substations...
Inductance gradient has great influence on the performance of railgun. This paper deduced armaturepsilas force formulation, explained inductance gradientpsilas physical meaning, introduced the governing equation of 2-D time harmonic electromagnetic field, built railgunpsilas 2-D finite element model; a common structure railgunpsilas inductance gradient is calculated. The influence of time harmonic...
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