Articles techniques et présentations

Introduction: Medium voltage reclosers are representing nowadays an important link between transmission power systems and low voltage grids. With a high level of renewable energy penetration, the medium voltage networks are becoming bidirectional. Therefore, the associated switching ... En savoir plus

Linear wave propagation through inhomogeneous structures of size R?? (Fig.1) is a computationally challenging problem, in particular when using finite element methods, due to the steep increase of the number of degrees of freedom as a function of R/?. Fortunately, when the geometry of ... En savoir plus

Conventional heating of material wastes energy during heating due to inherent radiation, conduction and convection based heating mechanism. Alternate efficient heating methods are actively researched for improved efficiency. Radio frequency based electromagnetic heating is increasingly ... En savoir plus

The purpose of this work was to establish a reliable radio frequency (RF) heating simulation which directly provides transient temperatures for medical devices with high geometric fidelity. These temporal results of localized temperatures can be used to determine conditions for safety of ... En savoir plus

Electromagnetic wave analysis of waveguide has been done in this paper with the help of Finite Element Method (FEM) based COMSOL Multiphysics. The design is further extended by placing conductor on a dielectric slab included in the waveguide to form a shielded microstrip transmission ... En savoir plus

Electromagnetic waves in the terahertz (THz) region may be useful for non-destructive imaging and biosensing technology. This presentation shows the example of our research aimed at the development of application in the THz region. The result of comparing the FDTD method and COMSOL ... En savoir plus

In transient analyses of electromagnetic fields with moving media, it is difficult to grasp the phenomena theoretically in the same manner of the convective heat diffusion since the treatment of the coupled problem with the field and dynamics must be necessary. In this presentation, we ... En savoir plus

Solid-state magnetic refrigeration near room temperature, based on the magnetocaloric effect (MCE), is being investigated as an environmentally friendly and sustainable alternative to traditional vapor-compression systems (responsible for the 7.8% of greenhouse gas emissions) [1] [2], ... En savoir plus

脉冲电磁场（PEMF）作为一种非侵入式物理干预手段，可通过特定频率的时变磁场改善血液循环，调节身体机能，进而改善睡眠。影响电磁场空间分布的因素众多，包括波形参数（脉冲波形、脉冲幅值、脉冲频率、脉冲组合等）和线圈参数（导线直径、线圈匝数、线圈尺寸、布局等）。本文在COMSOL Multipyhsics软件平台上聚焦于线圈参数的优化设计及其对空间磁感应强度分布的影响。首先，构建单、双线圈模型，系统分析线圈绕制参数及尺寸对空间磁场分布的影响规律；其次，建立多线圈模型，研究不同布局策略对磁场均匀性的提升效果；最后，构建符合人体结构特征的三维多线圈模型 ... En savoir plus

Structural colors of photonic crystals demonstrate significant application value in optical sensing and anti-counterfeiting due to their high stability and environmental friendliness. However, current research still lacks systematic investigation into the structure-property relationship ... En savoir plus