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
当前普遍应用空调均是通过调控整个房间的温度来控制环境,因此难以解决人与人之间热需求不同的问题。由此新兴的个人通风系统通过仅针对性地调节人体周围的微环境来达到节能和使人体热舒适的双重目的。本研究即是通过COMSOL模拟来探究不同的顶板风口入风条件对于其正下方的坐姿人体热舒适程度的影响,从而对今后智能空调的设计提供一种思路。 在COMSOL软件中,一个人体模型以差集的形式被设置于一个443(m)的房间中,房间顶板正中心设置一个圆环形状的入风口,在房间一侧面的底部设置了一个狭长出风口。模型采用了流体传热和Realizable k-e两个模块,基于房间的对称性 ... Per saperne di più
对黑莓果进行微波真空干燥,比较不同微波功率和不同真空度对黑莓干燥过程中温度的影响。采用数值模拟的方法,建立电磁与传热的耦合模型,经过2min的微波真空加热,得出不同微波功率、不同真空度下黑莓的仿真温度场分布图,并比较仿真与实验结果,通过仿真,观察到加热冷点位置并规避,减少热点位置的温度不均匀性。模拟与实验结果一致性高,表明模拟可以很好的仿真实验过程,并对微波干燥过程中不同时间和空间的温度场进行分析,保证黑莓微波真空干燥的温度均匀性和品质。 Per saperne di più
在电池的性能比较过程中总存在温升、恒流比、容量保持率、倍率性等电性能比较,其中影响这些性能的重要参数就是电池的极化大小。然而现实使用中极化很难以量化,仅仅用直流或者交流内阻来表示还显得单一且不具有说服力,所以寻求一种能够量化的手段从而来衡量电池的极化具有重要意义。通过极化的占比分析还可以分析哪一种极化影响较大,从而为电池的设计优化提供可靠的方向指导。 鉴于上述描述,我们开发了一种充放电过程中极化仿真方法及模型。在COMSOL® 软件的一维模型中定义编辑正负极以及隔膜电解液处反应极化方程和积分,然后利用“电池与燃料电池模块 ... Per saperne di più
Radio frequency (RF) drying is a novel drying technology. During the RF drying process, the internal and external temperature of the food material is elevated simultaneously when traditional heating method relies on heat transfer from the surface to the inside, which greatly improving ... Per saperne di più
通过COMSOL 内置的AC/DC模块可以模拟铁磁材料在磁场下的行为,如磁滞回线等。该方法通过求解麦克斯韦方程组来对材料的宏观磁性性质进行刻画。然而若要仿真磁性材料内微观或介观层面上磁矩的动力学行为,则需要使用到微磁学模型(micromagnetics),即求解Landau-Lifshitz-Gilbert方程(LLG方程)。微磁学模型假设磁性材料的磁性由若干个模长守恒的等效磁矩构成,由于交换相互作用、磁偶极相互作用、磁晶各向异性等各种相互作用的存在,我们可以仿真磁性材料内的微观磁结构,如磁畴壁、磁涡旋以及具有拓扑性质的磁斯格明子等 ... Per saperne di più
A series of ferroelectric ceramic models with grain and grain-boundary structures of different sizes are established via Voronoi tessellations. The relation between the electric displacement and electric field and the hysteresis loop are calculated using a finite element method based on ... Per saperne di più
Prediction of freezing temperature field close to the segment is very important in artificial ground freezing project. Because of the effect of convection and heat conduction, there are a lot of factors in numerical simulation for these problems. If the length of freezing wall close to ... Per saperne di più
熔喷是工业上用于制备微米纤维非织造布的一种工艺方法。在熔喷过程中,高聚物熔体经过高速、高温气流的拉伸,在接受装置上固化结晶形成微米纤维非织造布。由于熔喷材料具有很高的比表面积,因而具备良好的过滤性、吸附性、隔离性,可用于过滤材料、隔离材料、吸纳材料、口罩材料等领域。熔喷材料的优异性能是基于熔喷纤维的微纳米级的尺度,降低纤维的直径有利于提高熔喷产品的性能。由于纤维的拉伸细化发生在气流场的运动过程中,因此对纤维运动的研究具有重要意义。本研究将高聚物与气流所形成的混合体系作为两相流来处理。我们采用Comsol multiphysics 的水平集方法对熔喷过程的高聚物 ... Per saperne di più
In this work, we design a type of meta-prism which can provide high-efficiency coupling between free space and optical waveguides at infrared frequencies. The meta-prism is composed of an ABA multilayer structure with a fixed total thickness. By varying the filling ratio of the ... Per saperne di più
In this work, we investigate the resonant properties of finite-sized membrane-mass-type elastic metamaterial thin plates. We find that the effective bending stiffness of such metamaterial thin plates can be controlled independently by the out-of-plane rotational resonances, so as to vary ... Per saperne di più