See How Multiphysics Simulation Is Used in Research and Development
Engineers, researchers, and scientists across industries use multiphysics simulation to research and develop innovative product designs and processes. Find inspiration in technical papers and presentations they have presented at the COMSOL Conference. Browse the selection below or use the Quick Search tool to find a specific presentation or filter by application area.
View the COMSOL Conference 2023 Collection
ZnO/金刚石结构单端谐振器电极反射研究
近年来，随着智能手机的普及和移动通讯技术的不断升级，对高频高性能SAW器件的需求也出现了激增之势。由于具有高的声速，包含金刚石的多层膜结构SAW器件成为了人们研究的热点。多层膜结构除了要具有高的相速度和大的机电耦合系数外，还需要IDT具有大的反射系数来设计低损耗和小尺寸的SAW器件 ，而电极厚度是影响反射系数的重要因素。本文利用COMSOL中的压电设备模块研究了ZnO/金刚石结构中Rayleigh波的m1和m2模式在最大机电耦合系数处的电极效应。仿真了ZnO/金刚石结构单端谐振器声表面波器件，计算了不同电极厚度下SAW的相速度、机电耦合系数和反射系数 ... Read More
氮化铝钪/金刚石声表面波传播特性研究
随着电子通信的不断发展和普及，对声表面波器件（SAW）的性能要求也逐渐提升。在器件不断变小，工作环境的不断恶劣的情况下，声表面波器件也需要更高的频率、更好的稳定性能以及更大的带宽等新的提升。对于传统的氮化铝/金刚石结构来说已经无法满足更高频率，更大带宽的要求，所以本文为了能设计具有更高的相速度和机电耦合系数的声表面波器件，使用comsol 有限元仿真中的MEMS模块，对掺钪的氮化铝薄膜进行了研究，通过实验证明氮化铝钪作为压电材料时能具有更好的特性。通过研究在四种激励模式下氮化铝/金刚石结构与氮化铝钪/金刚石结构随着压电材料厚度的变化 ... Read More
基于非共面叉指电极的MEMS电容式压力传感器
针对MEMS电容式压力传感器的非线性和空腔引线问题，提出一种非共面叉指电极结构，叉指电极重叠面积变化反映电容变化，从而改善了传感器的线性度。此外，腔外设计的叉指电极还避免了复杂的制造工艺。 本案例第一个研究模拟了不同施加压力对MEMS电容式压力传感器输出特性的影响；第二个研究模拟了环境温度对MEMS电容式压力传感器输出特性、电场分布以及热应力和变形的影响。第三个研究模拟了加速度对MEMS电容式压力传感器输出特性、电场分布以及机械应力和变形的影响。模型同时使用了“AC/DC模块”的“静电”接口以及“结构力学模块”的“固体力学”和“膜”接口。 ... Read More
植入电极阵列的人体耳蜗模型仿真
对于神经性听力缺陷患者而言，人工耳蜗是目前主要的恢复手段。人工耳蜗通过植入体内的电极阵列产生电流，直接刺激耳蜗的螺旋神经节细胞，引起听觉系统响应。因此，研究植入耳蜗内电极阵列产生的电势分布特点具有重要意义。基于电势分布情况，可以对电极阵列的结构、尺寸、激励方式等进行优化，以提高人工耳蜗的性能。研究中使用的耳蜗以及电极阵列仿真模型为经过其他三维建模软件得到的STL文件导入COMSOL中生成。为了研究耳蜗内电势分布，选择了“电流（ec）”物理场接口，对模型边界设置了电势条件，对部分电极设置了激励电流条件。仿真模型的材料使用了库材料和自定义材料 ... Read More
Computing Surface Acoustic Wave Dispersion and Band Gaps
The dispersion of surface acoustic waves (SAWs) has long been studied for diverse applications ranging from seismic waves to microelectronic filters. In this work, we apply COMSOL Multiphysics software for the finite element investigation of SAW dispersion in two inhomogeneous ... Read More
Simulation of the Electrical Properties of Conductive ITO Thin Films by Finite Element Analysis
Finite element analysis (FEA) can be used to study the electrical properties of conductive ITO thin films. Previous studies have been done on insulating thin films deposited on conductive substrates [1,2]. It was found that changes of electrode size and film thicknesses can cause huge ... Read More
On The Directional Response of Multi-Driver Column Loudspeaker Configurations Using FEA and BEM
Column Loudspeakers employ multiple drivers to get close to a radiating line source. A line source gives several acoustic advantages versus a point source, especially in highly reverberant environments. This property particularly has made column loudspeakers the preferred solution in ... Read More
Modeling, Simulation, and Optimization of Piezoelectric Bimorph Transducer for Broadband Vibration Energy Harvesting in Two-piece Trapezoidal Approach
The objective of the research is to design a broadband energy harvester device through the two-piece non-linear trapezoidal geometry approach. The performance of two piezoelectric PZT-PZN polycrystalline ceramic composition samples are simulated in the COMSOL Multiphysics® software, and ... Read More
Analysis of Mechanical Sensitivity of MEMS Pressure Diaphragm for Contact Formation
MEMS Pressure sensors work on the principle of mechanical bending of thin diaphragm under applied load over diaphragm area. The sensitivity of diaphragm is crucial to efficiency of the sensor. It is defined as the increase in deflection of diaphragm as a result of increase in pressure ... Read More
Time-dependent Thermoelectric Switching in Vanadium Oxide
We report the reversible thermoelectric switching [1, 2, 3] induced by a time dependent and frequency domain electric field (or AC voltage) in a microscopic single contact nano-device based on Gold and Vanadium Oxide, which promises potential applications for future information storage ... Read More