Consultez les proceedings de la Conference COMSOL 2024
Our research group focuses on multi-physics biomechanics problems, some of which are not solvable using available modules. The PDE interfaces of COMSOL Multiphysics® simulation software, with their intuitive input syntax, have therefore become for us very valuable tools to advance ... En savoir plus
In his seminal work, “A Chemical Basis for Morphogenesis,” Alan Turing proposed a mechanism for pattern formation in nature. Turing patterns occur in a broad range of natural systems, from desert vegetation to animal markings. Turing mechanisms have also been implicated in processes ... En savoir plus
The dynamics of phase slip centers in a 1D model of superconducting wire was created based on the set of time-dependent Ginzburg-Landau equations (TDGL). The General Form PDE interface of COMSOL Multiphysics® simulation software was used. TDGL has successfully applied to this problem ... En savoir plus
We present a numerical model using the Finite Element Method (FEM) with COMSOL Multiphysics® simulation software to characterize Beer-Lambert law. The Heat Transfer Module was used in the program developed to calculate absorption and propagation of heat wave phenomena in a material. ... En savoir plus
An important attribute for numerical simulations is to provide accurate quantified solution values. Thus it is useful to find complex problems with analytic solutions to confirm the numerical results obtained from software. The well-known proximity effect causes a redistribution of ... En savoir plus
INTRODUCTION: The Dirac equation is employed in particle physics and historically gave the first combined unification of quantum mechanics and relativity theory by introducing a four component wave function Ψn n=1…4. This wave function describes the behavior of fermion type particles (e ... En savoir plus
The quantitative value of electrical bio impedance in tissue structures is sensitive to changes in ionic concentration, frequency and dispersion but lacks specificity. It is difficult to a create a physical measurement set up of clinical value capable of quantifying the contribution of ... En savoir plus
空芯光纤因空气芯的存在，理论上具备极低的光学非线性、色散与极高的损伤阈值，同时能够大大减弱了光纤材料吸收的影响，适合极端波长、大功率激光以及超短脉冲传输，在光通信、传感、微加工以及气体非线性研究等领域具有极大潜力。其中，反谐振空芯光纤因其简单有效的结构设计及低损宽带传输的特点而备受关注。这里我们利用COMSOL的波动光学模块对其进行若干数值仿真来研究针对此类具有大芯径-波长比和稀疏精细结构微结构空芯光纤的网格划分策略，并基于此进一步研究了反谐振空芯光纤的结构参数对其泄漏损耗以及材料吸收所引发的材料损耗的影响。我们通过对空气 ... En savoir plus
本文介绍利用COMSOL传热模块对激光闪射法（Laser Flash Method）测量具有环形结构的碳化硅复合包壳的瞬态传热过程，进而获得对标准激光闪射法估算热扩散率/热导率的几何修正系数和温度修正系数。 碳化硅复合包壳由多层的单质SiC陶瓷基体、SiC纤维编织层组成。碳化硅复合包壳在高温蒸汽中抗氧化性远远优于锆合金，因此被视为未来核电站燃料棒包壳的理想解决方案。为了开展碳化硅复合包壳的性能分析，需要使用激光闪射法获得其在500K~1800K温度范围的热扩散率。问题在于，激光闪射法标准(ASTM E1461-13)规定的样品形状为薄圆片 ... En savoir plus
鉴于煤岩体“孔—裂隙”双重介质属性，利用COMSOL软件建立了含有孔、裂隙结构的煤岩基质细观结构模型。在模型中采用固体力学模块、层流模块、达西定律模块以及稀物质传递模块，通过自定义参数耦合和边界耦合的方式实现了多物理场的相互耦合作用。针对不同裂隙入口气压情况进行了数值模拟计算和分析，结果表明在裂隙壁附近应力过渡明显，渗透率变化显著，极易发生损伤破坏。研究发现模型中存在某一临界位置，在其两侧渗透率随入口压力的变化规律相反，即模型中距裂隙边界一定范围内的煤岩基质渗透率随入口压力的增大而逐渐减小，但在此范围外的煤岩基质渗透率随入口压力的增大反而逐渐增大 ... En savoir plus