Articles techniques et présentations

Using COMSOL Multiphysics, numerical solution of electromagnetic field of microstrip open stub is obtained in frequency domain of 0.1GHz - 60GHz by using the COMSOL RF Module and the computed S11 is compared to experiment. It was found that the S11 predicted here is in good agreement ... En savoir plus

This paper describes a model of self-ventilated generator cooling on a 170 tons off-road mine dump truck. Considering the space restrictions of mine dump truck, the cooling systems for the generator and the in-wheel motors of the rear axle share one air inlet duct. With the action of ... En savoir plus

We, Sumitomo Heavy Industries, Ltd. have been developing a microwave ion source since 2011. The design of the chamber is important to generate plasma efficiently. The plasma chamber was designed with the COMSOL Multiphysics RF module, and reported the results at this conference last ... En savoir plus

With this presentation, some content has been discussed from several parts as follows: 1. Plasma switches are introduced by their derivation and types, and the operating mechanism of Hydrogen cross field plasma switch is indicated then. 2. The related theories of Hydrogen plasma to ... En savoir plus

In order to design invisibility cloak, we use two different type of spaces: Physical space and Mathematical space. This paper is in Japanese. En savoir plus

超材料是一类具有天然材料所不具备的特殊性质的材料[1-3]。近年来，有学者开始研究超材料对波的旋转效应，这一研究有着工程应用价值。江雪等[4]设计并实验验证了一种声场旋转器。江雪等[5]进一步研究了声场旋转器整体尺寸大小对其工作带宽的影响及声场旋转器中心处的旋转角度与其结构单元长度的关系。但未见声场旋转器结构单元尺寸对其工作带宽影响的研究。 本文采用 COMSOL Multiphysics® 的声学模块和结构力学模块模拟图1的俯视二维结构，采用完美匹配层以获得更好的模拟结果。 本文模拟了5个声场旋转器在不同频率下的声场，发现随着长方体结构单元长宽比的增加 ... En savoir plus

电力传送中经常遇到导线周围金属体连续分布的电荷的电场电势分布问题，其中线电荷的电场分布非常典型, 对于实际情况，当导体靠近导线，因物体形状的不同，其表面产生不同的电荷分布。 解决方案 1 实际情况是三维问题，而三维几何体表面电场分布很难推出解析解，分解成二维模型并验证其表面电荷分布，再通过 COMSOL Multiphysics® 建立三维模型进行仿真计算。 2 对于一般的有限元编程繁琐，计算量大，不可视化，在 COMSOL 中可以不用人工编程，通过绘图功能，可以绘出几何体表面电场线图，与解析解进行对比。 模型设计 1 二维模型中无限长导线用细长线代替 ... En savoir plus

Mathematical description of microwave drying requires the solution of two different physics: electromagnetics in the microwave oven cavity and food material and, transport process (mass, momentum and heat transport) in the food material. Maxwell’s equations for electromagnetics were ... En savoir plus

Use of the terahertz(THz) region, which is unexplored frequency band, is investigated and expected for the next-generation high-speed wireless communication. In this presentation, we propose a monolithic integrated device by using mesa-shaped compound semiconductor and a thin-metal ... En savoir plus

Academician Yao is an expert in nonlinear optics and THz studies and also a consultant of Chinese government for scientific development. In this talk, he introduces various research progress based on COMSOL Multiphysics analysis of his team, including photonic crystal devices (both ... En savoir plus