Articles techniques et présentations

Cowpea seed is a pulse which is very rich in vital micronutrients but also in anti-nutritional factors such as α-galactosides (verbascose, stachyose and raffinose) that can cause digestive disorders after consumption. The objective of this work was to identify the transport and ... En savoir plus

An ion trap resonator, used for mass spectrometry, is investigated. Simulations are used to define the stabilization criterion of ion trajectories by optimization of the electrode configurations. The ion interactions are investigated and shown to help in reduction of ion-diffusion. Space ... En savoir plus

Introduction: Recently, Li-ion battery is being widely used as power source for various applications from electronic gadgets to automotive industry. The performance and cycle life of Li-ion battery are becoming gradually important issues as the applications are shifting from small scale ... En savoir plus

随着能源紧张、油价攀升，环境污染严重，利用可再生绿色能源又成为不懈努力的方向。槽式太阳能热发电技术具有兼容性强、对电网冲击小、性价比高、发电成本低、可存储可调度等特点，近年来得到了迅猛发展，其核心部件为高温太阳能真空集热管，如图1所示。本研究利用 COMSOL Multiphysics® 针对真空集热管真实工况下的动态过程开展研究，并在此基础上开展集热管结构的优化设计。 由图 1 可知：集热管在电站中服役工况下，槽面会聚的太阳光主要集中于集热管下半面，上半面接收的会聚太阳光较少；导热工质自吸收管一端进入，接收会聚太阳光辐照能量，从吸收管另一端流出，流入→流出过程中 ... En savoir plus

Chlorine reactor is used to dry molten LiCl-KCl eutectic salt before it is put to use in electrorefining operation. Molten salt electrorefining is a pyrochemical method of separation of heavy elements from spent metallic nuclear fuel. It is a high-temperature process which uses molten ... En savoir plus

INTRODUCTION: Active cooling systems represent a possible solution to the electronics overheating that occurs in downhole tools operating on wireline, a cabling technology used to remotely control the downhole devices during oil and gas well interventions, in high temperature wells (150 ... En savoir plus

Large format Li-Ion battery cells (LIBC), often employed in electric vehicles (EV), show notable gradients in current and temperature distribution. This inhomogeneity can influence the cell’s safety and accelerate battery aging. It is, however, difficult to determine the local ... En savoir plus

Natural convection has to be accounted and simulated for in order to properly describe the physics encounter in the phase change process. A simplified two-dimensional model was created in COMSOL 4.1. Natural convection was accounted for by adding a volume force and using the Boussinesq ... En savoir plus

A 1D phase change problem, known as Stefan’s problem, for which analytical solutions are available, is solved as a 2D problem using COMSOL Multiphysics. The PCM medium is semi-infinite, initially solid at its melting temperature Tm, and at t = 0, the wall temperature is raised to Tw > ... En savoir plus

The ubiquitous commercial use of Lithium-Ion batteries (LIBs) has increased interest in their implementation into efficient energy storage systems for clean and renewable power sources and the electrical transportation industry. Unfortunately, LIBs are not yet technological mature to ... En savoir plus