Consultez les proceedings de la Conference COMSOL 2024
Flow, concentration and temperature fields are studied with numerical and experimental methods inside a scaled-up fuel cell anode channel model. The low aspect ratio channel has a porous medium as the inferior wall where a mixing of different pH solutions occurs. Chromatic change of ... En savoir plus
In order to predict the residual mechanical state of assemblies during pulsed laser welding, mechanical and metallurgical behaviors of materials need to be precisely characterized. Based on experimental data and analyses [1], a numerical model is developed in COMSOL Multiphysics® ... En savoir plus
Acoustic vibrations are studied for several objects through the application of computational and optical diagnostic techniques. Computational studies are carried out using the eigenfrequency analysis option in the COMSOL structural mechanics application mode, whereas experimental optical ... En savoir plus
Over the last decade, ambient vibration energy harvesting by piezoelectric materials has been an area of extensive research. This technology enables to convert wasted mechanical energy available in our environment into useful electrical energy to power up autonomous wireless sensors ... En savoir plus
空芯光子晶体光纤（HC-PCFs）具有不同于传统光纤的带隙导光机制，在光通信系统、高功率激光器、工业制造和生物医疗等许多领域有广阔的应用前景。随着光纤拉制技术的不断进步，不同纤芯结构的 HC-PCFs 出现并带来了更好的光传输特性（图1）。通过设计新的纤芯形状，并运用 COMSOL Multiphysics® 中的 RF 模块进行仿真，可以研究各种纤芯 HC-PCFs 的模式（图2）、泄漏损耗（图3）和波导色散（图4）等特性。结果表明：设计的内凹圆化形纤芯 HC-PCFs 比传统的正十二边形纤芯 HC-PCFs 有更低的泄漏损耗和波导色散，而设计的内凹直线形纤芯 HC ... En savoir plus
This poster describes a simulation of reverse saturable absorption in a solution C60 molecules using the COMSOL Multiphysics® software. The optical processes in C60 can be modeled through a five-level system. The energy states include three levels of the singlet state, coupled to two ... En savoir plus
干式变压器作为城区供电的重要电力设备，其连续运行时的振动噪声问题已成为制约其发展和应用的瓶颈，铁心的振动噪声不仅会对人们的生活环境造成污染，而且会降低设备的可靠性。由于该问题涉及电磁-机械-声多物理场耦合，铁心振动噪声的准确计算是研究此问题的关键。为此本文基于硅钢片磁特性的测量数据，并考虑铁心磁致伸缩效应，采用 COMSOL Multiphysics 多物理场仿真软件，通过 AC/DC 模块、声-固耦合模块对变压器铁心的应力、声压级分布进行研究，并提出优化控制方法。首先进行场路耦合计算，得到铁心磁场分布及应力分布，最后基于振动位移计算变压器的噪声情况 ... En savoir plus
This paper describes using thermal structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain ... En savoir plus
This paper describes using thermal-structural interaction to model the shrinkage behavior in cement paste under drying. An inverse method of combining the finite element analysis and the least-squares method is implemented to fit experimentally determined shrinkage in order to obtain ... En savoir plus
Strain induced by local deformation of a flexible micrometer-sized semiconductor tube is quantified by modeling a ball pressing on the tube wall. By changing the pressing condition, we are able to change the strain state of the tube wall incorporating self-assembled quantum dots (QDs) in ... En savoir plus