Articles techniques et présentations

We discuss the use of COMSOL Multiphysics 3.4 in the aerodynamic optimization process of the UNLV solarpowered UAV. We also address the use of COMSOL’s Multiphysics ability and how it was used within the scope of the project. In particular we highlight the development of wingtip devices, ... En savoir plus

COMSOL® "Single Particle Model for Lithium-Ion Batteries” (Model ID: 14527) is generalized to include an energy balance. This is accomplished by approximating the solution phase polarization as a function of current and temperature. The theoretical approach for this work is similar to ... En savoir plus

自铅酸电池发明以来，由于其功率密度高，成本低等优点，铅酸电池成为目前市场份额最高的二次电池。但是铅酸电池能量密度较低等缺点限制了它在诸如电动汽车等领域的应用。为拓展铅酸电池的应用范围，本文提出了一种新型铅酸电池——铅空气电池，并利用 COMSOL Multiphysics® 对其性能进行初步预测。铅空气电池是将传统铅酸电池中氧化铅电极替换为空气电极的一种新型铅酸电池。建立模型的过程中参考了案例库中“铅酸电池的放电与自放电”和“一维等温锂空气电池”两个案例，使用铅酸电池接口模拟电极反应，电极孔隙率变化，电解质传递行为和浓度变化 ... En savoir plus

This paper presents a methodology towards designing, analyzing and optimizing piezoelectric interdigitated microactuators using COMSOL Multiphysics. The models used in this study were based on a circularly interdigitated design that takes advantage of primarily the d{;sub}33 ... En savoir plus

Lithium microbatteries are replacing conventional power sources in many microsystems areas such as wireless sensors and biomedical monitors. In many of these applications, compact models of micro batteries are needed both at the microsystems design stage and at the real-time power ... En savoir plus

Redmer van Tijum studied Applied Physics at the University of Groningen. In 2006, he received his PhD title on ‘Interface and surface roughness of polymer metal laminates’ in the field of Material Science at the University of Groningen. After that he became research and development ... En savoir plus

Lithium-sulphur (Li-S) batteries have the potential to surpass the energy storage capability of Li-ion batteries due to their high theoretical gravimetric energy density of 2700 Wh/kg. However, the processes which drive the system behaviour are much more complex than those in a Li-ion ... En savoir plus

INTRODUCTION: A key parameter for electrical engines is the power density. High power density is particular beneficial for traction drives. Accordingly, optimizing power density is essential for competitive ability in the Formula Student Electric racing series [1]. The operating ... En savoir plus

This study demonstrates that a multiphysics model of a LiFePO4/Li half-cell can be applied to simulate the impedance results from an EIS. However, it implies that the double layer capacitance has to be taken into account, since it is responsible of the semi-circle in the impedance ... En savoir plus

Due to computational considerations most models of lithium storage particles in batteries incorporate spherical particles. However most storage particles used in battery electrodes tend to be irregular in shape with sharp edges and extended aspect ratios. The change of the relative ... En savoir plus