Articles techniques et présentations

Package material for liquid food packages typically features a multilayered structure with paperboard as a core material and protective polymer layers towards the product and the ambient. Aseptic food packages require an additional barrier layer comprising a thin aluminum layer. Aluminum ... En savoir plus

An electrically heated fixed bed (19 mm diameter, 200 mm length) is investigated regarding its electrical conductivity. Various electrically conductive activated carbons are used. The fixed bed is constructed from activated carbon pellets and/or activated carbon fabric. Electrical ... En savoir plus

The increasing demand for large battery packs, driven by the expanding markets for electric vehicles (EVs) and grid-scale energy storage system, necessitates the development rapid battery pack development pipelines such as simulation. We present an integrated multiscale simulation ... En savoir plus

Microwave heating for CO_2 desorption provides fast, low-temperature desorption, lowering energy requirements in carbon capture. According to studies, microwaves generate selective heating, dramatically increasing desorption rates compared to traditional approaches. This new technique ... En savoir plus

Efficient mixing and pumping of liquids at the microscale is a technology that is still to be optimized. The combination of an AC electric field with a small temperature gradient leads to a strong electrothermal flow that can be used for multiple purposes. Combining simulations and ... En savoir plus

The simplicity, reliability and low costs of electro-mechanical breakers have made them the workhorse for the interruption of low voltage short-circuit currents. In the presence of a short circuit, the contacts of the breaker heat up, and a bridge of molten metal forms between the pair ... En savoir plus

钨丝是早期热发射电子源阴极灯丝的关键材料，工程组件上多数采用的灯丝直径为0.127~0.203mm，一般将其制成V型发叉式。模型构建了三维灯丝几何结构，计算过程中对灯丝弯折角处的区域进行网格加密处理。结合COMSOL Multiphysics多物理场的电磁热模块，实现了对钨灯丝的温度分布模拟计算，并进一步计算不同几何结构和不同灯丝材料对灯丝温度分布的影响。仿真结果表明，在材料钨、钛、锆以及各种弯折角度下，灯丝最高温度与弯曲处温度差稳定在30~40K左右。从趋势上看，弯折角度α越小灯丝总温度越高。该工作解释了常见灯丝熔断点非灯丝针尖的工程问题 ... En savoir plus

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 Z-pinch (or zeta pinch) is a type of plasma confinement system used in fusion power research. It relies on an electric current discharge within the plasma to generate a magnetic field that compresses the plasma, creating conditions conducive to nuclear fusion. The concept of Z-pinch ... En savoir plus

Induction heating (IH) [1] is an electrically driven process useful for decarbonization of the industry. It can be used for electrification of chemical processes to replace traditional heating with gas burner and avoid CO2 emission. This kind of process can be used to heat efficiently ... En savoir plus