Scopri come la simulazione multifisica viene utilizzata per ricerca e sviluppo
In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.
Visualizza gli articoli presentati alla COMSOL Conference 2020
Electrochemical systems are devices or processes in which an ionic conductor mediates the interconversion of chemical and electrical energy. This paper presents a model to simulate the electroplating of copper in a microcavity typically found in the plating of copper onto circuit ... Per saperne di più
Modern adiabatic calorimeters are designed to keep thermal inertia as low as possible so that temperature-dependent reaction rates and heats of reaction can be accurately extracted from the thermocouple data. Published models of this type of equipment are generally zero dimensional (0D) ... Per saperne di più
This paper studies external corrosion of an underground transmission pipeline carrying natural gas. Pitting corrosion and Stress Corrosion Cracking (SCC) are two most common external corrosion types for buried pipelines and they usually happen when the mitigation methods such as coating ... Per saperne di più
Near-field scanning optical microscopy (NSOM) combines the potential of scanning probe technology with the power of optical microscopy and provides us with eyes for the nanoworld. NSOM probes require a subwavelength optical aperture with wide cone angle of the probe to efficiently ... Per saperne di più
A 3D unsteady state chemical reaction system was modeled using COMSOL Multiphysics® simulation software. In this work, the Chemical Reaction Engineering Module was integrated to calculate physical, chemical and thermodynamic properties and transport phenomena. Advanced materials such as ... Per saperne di più
钙钛矿纳米晶的合成通常是使用间歇式搅拌系统进行（将前驱液滴加入反溶剂甲苯）。宏观间歇式反应器在高耗能的同时，并不能保证制备的纳米晶的尺寸均匀可控，实验的重复性也不好。而微流体具有高效的传质传热特性，以及良好的可操纵性。同时体系反应体积的急剧下降使得反应过程的不确定性大大降低。这样保证所有晶体拥有相同的成核和生长环境。所以使用微反应器制备的纳米晶的尺寸均匀可控。由结晶动力学可知，结晶过程的溶液过饱和度以及晶核周围的速度场分布对产物晶体有影响。所以我们使用COMSOL软件对比了微反应器和间歇式反应器运行时的体系的速度场和浓度场的分布情况。以达到调控产物晶体的质量的目的。 Per saperne di più
面对当前磷矿资源短缺、水体富营养化污染严重、农业源磷排放量大的问题,采用自主研发的ESR-101氮磷回收电化学反应器以鸟粪石结晶沉淀的形式资源化回收废水中的氮磷。而其中pH是影响鸟粪石结晶沉淀的重要指示剂。为了探究反应器中pH动态变化规律过程，利用COMSOL Multiphysics中电化学模块一次电流分布、稀物质传递和化学等多物理场接口，在不同电流和流速影响条件下，模拟反应器流道中pH的动态变化规律。仿真结果表明：过高或过低的电流和流量均不利于pH的调控和反应的进行。pH过高容易形成其它的沉淀，不利于鸟粪石的形成；而pH过低会使得形成鸟粪石的条件不充分。因此 ... Per saperne di più
线板电极结构是电晕放电装置中一种常见的结构，但是其电晕放电的发展过程却一直不清楚。本文利用comsol中的等离子化学模块，对大气压条件下空气介质中线板电极的负电晕放电发展过程进行了仿真研究。在仿真模型中，高压电极为线电极，板电极为地电极，模型包含了12中粒子之间的26种反应，其涵盖了典型的弹性碰撞，碰撞电离，电荷转移，复合反应，附和与解离反应。最终的仿真结果显示，在电晕放电发展初期存在一个脉动过程，等离子体以脉冲的形式向地电极扩展。当电晕处于稳态时，在高压电极处是以O4+为主的阳离子，在远离高压电极处的地方以O2-及O-等阴离子为主 ... Per saperne di più
鸟粪石磷回收法不仅可以去除污水中的磷，同时也可以将磷以鸟粪石沉淀的形式进行资源化回收利用，是污水处理（尤其是含磷较高的工业废水和农业废水等）环节中重要的技术手段之一。利用COMSOL Multiphysics中电化学模块一次电流分布接口、稀物质传递和化学多物理场接口，研究不同电流和流速影响条件下，鸟粪石电解器中不同通道pH的动态变化规律；仿真结果显示：不同通道pH的动态变化规律与试验结果一致。因此，此项研究不仅可通过调节电流和流速充分调控pH, 而且可为工程实践中通过调控pH提高鸟粪石电解器的时空产率提供理论指导。 Per saperne di più
目前，很少有模型来描绘植被通对填埋场覆盖土甲烷传输、氧化和释放的影响。本研究的目的是利用模型分析的方法来分析植被对填埋场覆盖体甲烷传输、氧化和释放的影响。模型主要考察了植物关键生理特性如根结构、植物释氧强度、根长度、植物蒸腾速率以及环境因素如覆盖土初始含水率、环境温度等对甲烷氧化的影响。模型研究结果将有助于理解填埋场植被覆盖区甲烷释放机制以及选择合理填埋场管理方式减少温室气体排放。 本研究运用多孔介质稀物质传递、Richarcd 方程、达西定律、热对流等模块分析了植被覆盖条件下填埋场覆盖土中水、热、气传输耦合甲烷氧化 ... Per saperne di più