技術情報とプレゼンテーション

The app discussed in this paper is based on a COMSOL Multiphysics® 1D heat transfer model that analyses the heat flow through a double pane window, with a gas chamber between the two panes, as would normally be mounted in the wall of a building, a container or a refrigerated chamber. The ... 詳細を見る

Pipeline inspection tools present some limitations related to power supply which require recharging after each operation. Using batteries or tethered tools make the duration to inspect any pipeline very limited and time consuming. This paper aims at designing a spherical self-recharging ... 詳細を見る

在电池的性能比较过程中总存在温升、恒流比、容量保持率、倍率性等电性能比较，其中影响这些性能的重要参数就是电池的极化大小。然而现实使用中极化很难以量化，仅仅用直流或者交流内阻来表示还显得单一且不具有说服力，所以寻求一种能够量化的手段从而来衡量电池的极化具有重要意义。通过极化的占比分析还可以分析哪一种极化影响较大，从而为电池的设计优化提供可靠的方向指导。 鉴于上述描述，我们开发了一种充放电过程中极化仿真方法及模型。在COMSOL® 软件的一维模型中定义编辑正负极以及隔膜电解液处反应极化方程和积分，然后利用“电池与燃料电池模块 ... 詳細を見る

锂离子电池的充电性能受环境温度影响较大，低温条件下充电极化电压升高充电容量下降的问题一直限制了锂离子电池的发展。本文以电化学反应动力学、质量守恒、电荷守恒和能量守恒为理论基础，利用COMSOL软件建立基于LiFePO4/石墨锂离子电池的电化学-热耦合瞬态计算模型，研究了-5℃、-10℃、-15℃三个低温条件下，锂离子电池充电过程中端电压和正极液相扩散极化电压随SOC的变化规律，并进一步通过提出表征这种极化的变量Pdpe，定量分析了低温条件对正极液相扩散极化的影响，最后通过电解质盐浓度和电解质电流密度分析极化变化的原因 ... 詳細を見る

Brain-Machine Interfaces (BMI) provide a direct communication link between brain and external devices such as speech synthesizers and robotic prosthesis to restore speech and movement in persons affected by Spinal Cord Injuries or neurodegenerative diseases such as Amyotrophic Lateral ... 詳細を見る

Introduction: Vibration energy harvester can convert mechanical vibration energy into electrical energy and store it in battery for later use. It can create clean renewable energy from vibration movements such as walking, jumping, running, etc. This can convert energy previously wasted ... 詳細を見る

The EPFLoop team from Ecole Polytechnique Fédérale de Lausanne has developed a capsule thanks to which it won the 3rd place in SpaceX’s Hyperloop Pod Competition in 2018. This year the EPFLoop team has been selected again to participate at the 2019 Competition held at the SpaceX ... 詳細を見る

Lithium ion batteries and similar energy storage devices have an increasing importance for the modern society as they are present in many portable electronic devices and have perspectives in the fields of electric vehicles and renewable energy accumulation. Herein, we present results ... 詳細を見る

In the conference we bring together a community that is scientifically diverse in an event about the use of COMSOL Multiphysics. Oral and poster presentations highlight achievements in multiphysics modeling and simulations using COMSOL. 詳細を見る

In this study fluid-dynamical and thermal performance of active chilled beams is investigated by 2D and 3D modelling in COMSOL Multiphysics. Three different typologies of those air conditioning systems are considered. Results, obtained for typical range of variation of operational ... 詳細を見る