Articles techniques et présentations

The Yellowstone Volcanic Complex (YVC) in Yellowstone National Park (Wyoming, USA) attracts intense geological interest, as it ranks as one of the largest active continental silicic volcanic fields worldwide. Despite extensive research on the region's high heat flow and abundant ... En savoir plus

FT wind sensors measure wind speed and direction using an acoustic field superimposed on a flow field in an acoustic resonator equipped with three piezoelectric transducers. The study proposed here focuses on the acoustic resonance technology of a simplified wind sensor geometry, and how ... En savoir plus

Mine hoists are significant capital investments, so their efficient, safe, and reliable operation are of vital importance to mining companies. ABB delivers numerous drum hoisting systems to underground mines in China, South Africa, as well as to Poland. ABB mine hoists are one of the ... En savoir plus

As part of its research, the Group of Electrical Engineering-Paris (GeePs) uses COMSOL Multiphysics software for applications such as material modelling in Electrical Engineering, electromagnetic compatibility and Eddy current non-destructive testing (EC-NDT). EC-NDT is an easy-to-use ... En savoir plus

The storage of CO2 in the sub-surface is seen as a technology that can contribute to the generally accepted goal of a de-carbonized society. As real field experiments are hardly feasible, many current studies utilize the capabilities of numerical modelling. Concerning the practical ... En savoir plus

This study focuses on the design and optimization of a logging while drilling (LWD) tool with look-ahead detection capabilities, which is widely used in measuring formation resistivity and detecting formation boundaries ahead of the drill bit during oil and gas drilling operations. The ... En savoir plus

The Reelwell Drilling Method (RDM) represents an innovative and energy-efficient approach to directional drilling (Rajabi et al. 2009; Belarde and Vestavik 2011; Breivik et al. 2020). RDM has been particularly successful in enhancing MPD and ERD. The technology enables constant well ... En savoir plus

This study focuses on designing biomimetic leaf-like flow fields for co-electrolysis in solid oxide electrolysis cell (SOEC). The goal is to enhance overall performance in energy conversion processes. A three-dimensional SOEC model is developed using COMSOL to investigate the impact of ... En savoir plus

为了探究新型环保气体中流注的产生机理和发展过程，为局部放电的光学检测和可靠诊断提供理论基础，通过 COMSOL 仿真直流电压下 C4F7N/CO2 混合气体中针板模型一次流注到 二次流注的放电过程，将电子和离子的产生与运动通过连续性方程进行表示，获得流注发展过程中电场的变化规律和光通量的密度分布。仿真结果表明，当一次流注头部靠近阴极时，光通量将呈指数增长；随后空间电荷将迅速地重新分配，阴极处的电子将通过流注通道进入阳极，一次流注的等离子体鞘层被破坏，流注体内部的电场上升；随着通道的导电性降低，电荷重新分配结束，二次流注开始向阴极发展。二次流注与一次流注相比 ... En savoir plus

为了实现锂电池电芯设计定向优化及评估析锂风险，如Fig.1所示，本工作利用COMSOL的“电池模块”中的“Lithium-ion battery”物理接口，基于Dolye等[1]的伪二维（P2D）模型、多孔电极及浓溶液理论，建立了固液相电荷守恒、固液相物质守恒及电荷转移守恒方程并求解，采用带初始化的瞬态求解器进行仿真。考虑到计算成本及场景需求，磷酸铁锂（LFP）电池电芯设计、极片缺陷和涂覆不同动力学负极材料案例分别构建为一维、二维和三维模型。为优化LFP的多孔电极的孔隙率、厚度设计，实现比能量和比功率最大化，基于COMSOL锂电池接口模拟了290多组设计实验 ... En savoir plus