Articles techniques et présentations

Axial-flux permanent-magnet motors are an important technology in many technical applications, being an alternative to radial-flux motors. Axial-flux motors come up with many advantages in comparison to radial-flux motors such as high-power density, higher torque to weight ratio etc. ... En savoir plus

The scale up of electrical energy storage is one of the great technological challenges of our time as the world must quickly transform its energy infrastructure away from fossil fuels. Companies striving to commercialize new battery technologies must solve numerous electrochemical, ... En savoir plus

Lithium-ion batteries are leading the electrification transition, particularly within the transport sector. However, numerous challenges still remain, with fast charging emerging as a major concern. To speed up research, physics-based models are frequently employed alongside experimental ... En savoir plus

The use of advanced manufacturing technologies expands the design scope of lightweight components for aerospace systems and enables innovative possibilities for complex structures [1, 2]. The overall approach of the AdHyBau (Additive Hybrid Construction) joint project is to develop new ... En savoir plus

In this study, a small scale direct solar thermal energy storage system with secondary reflector is designed and developed. The main advantage of thermal energy storage is that cooking can be carried out during the time when there is little or no sun shine. In addition, no heat transport ... En savoir plus

The integration of machine learning (ML) techniques into geophysical exploration and underwater mapping has emerged as a transformative approach for interpreting complex sensor data. This paper presents a comprehensive framework for using COMSOL Multiphysics to develop and validate ... En savoir plus

在所有电池系统中，锂氧电池的理论比能量最高，而实际比能量却明显不足。阻碍氧和/或电子传递导致多孔空气电极的有限利用，而实现对电化学和质量传递耦合的定量理解是具有挑战性的。本文首创了一种具有高度一致和可控通道单元的多孔电极，该电极排除了无序孔隙的随机性，从而能够研究控制机制。通过comsol建立了一个动态非均质模型，提供了LiO2的第一个时空分布，揭示了其在有限电子输运下的反向扩散轨迹。实验和模型的协同结合确定了通道尺寸在分为质量，杂交和电子传递控制的机制中的关键作用。对于大孔隙来说，提高Li2O2的导电性和减轻固液界面损伤比增强氧的扩散更为迫切 ... En savoir plus

压电材料在受到机械应力时会产生电压，这种性质使压电材料在声波传感器领域具有广泛应用。湿度的测量和把控广泛地应用于粮食贮存、气象预报与加工以及国防建设等各个领域。当今社会对各种成本低、性能优异的湿度传感器的需求正在日益上升。石英晶体微天平（QCM）具有高灵敏度、无需物理接触、体积小、易于集成等特点，通过在石英晶体微天平表面覆盖一层能够响应水分子的材料，可以监测环境中的湿度。这种材料能够吸收和解吸水分，从而改变石英晶体的质量，进而影响其共振频率。通过检测这一频率的变化，我们可以准确获取周围的相对湿度。本研究利用有限元软件COMSOL的多物理场耦合功能 ... En savoir plus

Ultrasonic nondestructive testing (NDT) is extensively used in fields like medicine, oil and gas, and aerospace to inspect materials without causing damage. However, developing experimental setups and prototypes can be costly and time-consuming. This study employs advanced computational ... En savoir plus

Clayey soils and rocks are often used to secure contaminants, dissolved in the interstitial water, or fluids immiscible with water, because of their hydraulic properties (very low permeability and high water retention capabilities, see e.g. McCartney et al., 2016). However, their hydro ... En savoir plus