Articles techniques et présentations

In karst terrain, the interaction between the fast moving, highly turbulent conduit flow and the slow moving, laminar flow through porous media is largely unknown. Yet the dual nature of the karst system impacts the residence time of solutes in the groundwater supplies of over 25% of the ... En savoir plus

Corrugated board is produced on a machine where the corrugated medium is glued between two flat paper surfaces, the liners. The board is cut into sheets and stored in a stack until suitable moisture content has been reached. The sheets are then cut and creased into blanks for the ... En savoir plus

“页岩气革命”使美国成功摆脱了对他国能源的严重依赖，目前我国页岩气的勘探开发也已取得了突破性成果，但是随着页岩气的开发，仍存在三大问题困扰着科学工作者和现场工程师：（1）页岩气开发过程中的渗透率演化规律尚未摸清；（2）在产气过程中，页岩气在产量上往往呈现出不确定性；（3）缺乏针对页岩气进行历史拟合和产量预测的数学工具。针对以上三个主要问题，我们定义非常规储层固有渗透率的演化是裂隙和基质之间物质传输和应力传递的结果，并建立了离散体模型研究孔隙变形与流体流动之间的耦合作用；以此为基础，我们建立双基质双重孔隙介质模型（连续介质模型）研究页岩基质变形与流体流动之间的耦合关系 ... En savoir plus

Over time, rechargeable batteries degrade and eventually stop working. You see some combination of declining capacity, rapid self-discharge, and reduced power. Degradation mode depends on battery design, but also on the application. Often, multiple physical processes contribute to ... En savoir plus

A time-dependent study was conducted using COMSOL Multiphysics® (Conjugate Heat Transfer interface and Heat Transfer with Phase Change feature) for the numerical investigation of the thermal performance of novel Phase Change Material (PCM)-enhanced plasters for their incorporation in ... En savoir plus

This work investigates the possibility of thermal activation of future tunnels to heat and/or cool the surface buildings or infrastructure such as subways stations. The principle is to insert pipes in the tunnel lining segments, which are connected to a geothermal pump. A heat transfer ... En savoir plus

Improved performance of aeroengines requires the development of new manufacturing technologies for ceramic matrix composites (CMCs). This has been simulated using COMSOL Multiphysics. Specialized simulation technologies have been developed to describe the infiltration of molten material ... En savoir plus

Permanent Magnet Flowmeter (PMFM) is a non invasive device, which is used to measure the flow of electricallyconducting sodium in Fast Breeder Reactor Circuits. PMFM works on the principle of generation of motional EMF by magnetic forces exerted on the charges in a moving conductor. In ... En savoir plus

Sediment transport in shallow water is of concern in many hydro-ecological problems. Erosion or sedimentation processes are not only relevant in perennial systems as rivers, lakes, reservoirs and coastal regions, but also in ephemeral phenomena like gullies, inundations and floods. ... En savoir plus

The solidification of a fluid in a partially-filled circular cylinder is encountered in a number of industrial processes and in the oil and gas sector. The characteristics of the process depends on various fluid and geometrical parameters. In the current study, a fluid with temperature ... En savoir plus