Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.
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COMSOL Multiphysics Applied to MEMS Simulation and Design

Dr. Piotr Kropelnicki[1]
Mu Xiao Jing[1]
Wan Chia Ang[1]
Cai Hong[1]
Andrew B. Randles[1]

[1]Institute of Microelectronics, Agency for Science, Technology and Research, Singapore, Singapore

In this research, we performed multiple COMSOL Multiphysics® simulations. We analyzed the dispersion curves of waves in a LAMB wave pressure sensor; simulated a thin metal film in a microbolometer and observed the resulting stress; investigated the thermal behavior of an acoustic wave microbolometer; and modeled the fluid-structure interaction (FSI) for piezoelectric-based energy harvesting from ...

Cloud Computations for Acoustics with Coupled Physics - new

A. Daneryd[1], D. Ericsson[2]
[1]ABB Corporate Research, Västerås, Sweden
[2]COMSOL AB, Stockholm, Sweden

For certain classes of scientific and technical computations the cloud may offer easily accessible, scalable, and affordable gigantic computing power. A power that for these classes may lead to a step change in model and analysis complexity compared to what is feasible with dedicated clusters and similar networked solutions. Acoustics with or without interaction with coupled physics fields ...

Thermal Natural Convection Simulations with COMSOL Multiphysics® in Comparison with Measurements - new

H. van Halewijn[1]
[1]Fontys University of Applied Physics, Eindhoven, The Netherlands

In a laboratory setup a horizontal rod is heated on one side. By natural convection a stable temperature pattern is developed. Using the Nusselt formulation of the natural convection of cylindrical rods, the temperature distribution can be calculated. Only a good match of the simulations and the measurements can be reached when taking into account all the non-linear physics in the system. In ...

Near-Wall Dynamics of Microbubbles in an Acoustical Trap - new

L. Wright[1], G. Memoli[1], P. Jones[2], E. Stride[3]
[1]National Physical Laboratory, Teddington, UK
[2]University College London, London, UK
[3]University of Oxford, Oxford, UK

Understanding the interactions between microbubbles and surfaces is key to the successful deployment of microbubbles in a range of applications. Two important examples are their use as a drug delivery mechanism, and their potential use of acoustically-driven bubbles as microscale sensors. Drug delivery with bubbles involves sonication at high frequency close to a boundary, and sensing with ...

Development of a RheoDSC, an Instrument for Simultaneous Rheological and Calorimetric Measurements

L. Van Lokeren [1], R. Verhelle [1], C. Block [1], P. Van Puyvelde [2], G. Van Assche [1]
[1] Vrije Universiteit Brussel, Brussels, Belgium
[2] Catholic University of Leuven, Leuven, Belgium

Transformations in polymers, such as polymerisation, melting/crystallization, and phase separation/remixing, are associated with changes in both rheological and thermal properties. To permit simultaneous calorimetric and rheometric measurements, the RheoDSC was developed. The RheoDSC combines two commercial instruments, a TA Instruments Q2000 DSC and a TA Instruments AR-G2 dynamic rheometer. A ...

Numerical Analysis of the Flow Structure in the Continuous Casting Two-strand Tundish

M. Warzecha [1], J. Jowsa [1], A. M. Hutny [1], P. Warzecha [1], T. Merder [2]
[1] Czestochowa University of Technology, Czestochowa, Poland
[2] Silesian University of Technology, Katowice, Poland

Calculations were carried out for the water model of the investigated tundish, represented on a scale 1:3. Numerical calculations enable to estimate the fluid flow velocities, pahtlines and other parameters. Calculations were done for two different grids. Based on the results, the flow structure in the investigated tundish was obtained.

Numerical Simulation of Kinetic Interface Sensitive Tracer in Experiment with COMSOL Multiphysics® Software

F. Sun [1], A. Tatomir [1], F. Maier [2], M. Sauter [1]
[1] University of Goettingen, Goettingen, Lower Saxony, Germany
[2] Comsol Multiphysics GmbH, Goettingen, Lower Saxony, Germany

The kinetic interface-sensitive tracers (KIS tracers) are used to give a partial picture of the spreading, mixing and plume migration of supercritical carbon dioxide (scCO2) in the deep saline aquifer by estimating the interfacial areas between scCO2 and brine during the injection of scCO2. To get a better understanding of the KIS tracer reaction and transport processes in the two-phase flow ...

Modeling of a Direct Methanol Fuel Cell

J. Drillet [1],
[1] DECHEMA-Forschungsinstitut, Frankfurt, Germany

This work aims at the modelling of a 5 cm^2 Direct Methanol Fuel Cell (DMFC) with mixed serial/parallel serpentine flow fields in terms of current/voltage behavior. One of the main challenge to overcome consists on lowering the so-called methanol cross over from the anode through the polymer membrane to the cathode that is responsible for mixed-potential formation at the cathode where both ...

基于 COMSOL 的 PVT 法 AlN 晶体生长仿真:温场对生长驱动力的影响研究

金雷 [1],
[1] 中国电子科技集团公司第四十六研究所,天津,中国

分别从软件模拟和晶体生长实验两方面对衬底表面的温度分布进行研究,进而达到控制 AlN 蒸气在衬底表面过饱和度的目的。理论上,结合异质形核理论(图1 (a)-(c)),采用 COMSOL Multiphysics® 模拟软件对坩埚结构的温度分布进行模拟仿真(图1(d)),模拟结果表明:复合型衬底可以显著地改变衬底表面的温度分布,进而改变衬底表面 AlN 气氛的过饱和度,实现对晶体生长驱动力[1]的控制;实验上,采用 PVT 法 AlN 晶体的生长实验验证了软件模拟结果。采用复合型衬底生长 AlN 晶体时,通过对衬底表面的温度分布调控,如图1 (c)-(g)所示,可有效地控制晶体生长驱动力,进而实现形核位置和形核数量的控制[2,3],经过 6~10 h AlN 晶体生长后,可获得较大直径的 AlN 单晶。拉曼光谱和 XRD 双晶摇摆曲线测试[4]结果表明,晶体具有很好的结晶性能。

电力母线板稳态、瞬态多物理场模型差异分析

程屾 [1], 刑燕好 [1]
[1] 沈阳工业大学,沈阳,中国

随着电力工业的快速发展,母线板作为汇集、分配和传送电能的装置,广泛应用于各个电工领域。由于流过母线板的电流一般较大,其温升发热问题不容忽视。该问题涉及电磁场、温度场、流场及位移场等多个物理场的综合。为了更好地研究其发热散热问题,本文采用 COMSOL Multiphysics® 多物理场直接耦合分析软件,基于有限元理论,在考虑设备几何形状和材料物理特性影响的基础上,对母线板进行三维建模。分别在瞬态和稳态情况下对母线板进行电—热—力耦合场分析,电—热—流耦合场分析,从而研究母线板的温度、电流密度分布规律和由于热膨胀引起的形变大小。最后加入层流,分析在考虑气流冷却效应时,母线板的散热情况,并对仿真结果进行研究分析。