Consultez les proceedings de la Conference COMSOL 2020
为提高长距离大容量输电的经济性,我国采用特高压直流技术。随着特高压工程的建设和民众电磁环境意识的增强,电磁环境成为影响输电线路结构和建设费用的重要因素。合成电场是特高压输电工程的电磁环境效应之一,其由导线电荷产生的标称电场和空间电荷产生的离子流场组成。标称电场的计算是合成电场计算的前提,本文采用 COMSOL 软件计算了 ±800kV 直流输电线路周围的标称电场。 En savoir plus
电阻抗成像(EIT)技术由于分辨率较低受到专家学者的诟病,而EIT与超声技术两者的结合以及 EIT 与磁共振技术两者的结合可以提高成像的分辨率,但仍分别存在电极射频屏蔽效应以及分辨率难以进一步提高等问题。本文将磁共振成像技术和磁声电技术优势互补,采用低频振动进行激励,提出了一种新的动电成像方法,并采用 COMSOL 软件建立了二维仿真模型,使用 PDE 模式对动电阻抗成像的正问题进行了仿真研究,利用 COMSOL 的仿真结果结合Matlab软件进行了反演,实验结果可以反映出仿真模型内部的电导率分布,能够解决上述电阻抗成像结合技术存在的问题。 En savoir plus
摘要:油气勘探开发实践表明,主要油气层段中会存在 1.0m 以下的薄油气层。地质研究及试油试气结果证实,如果措施得当,这类薄储层也能获得较好的产能。为了研究高分辨率阵列感应测井仪器在含薄夹层地层中的测井响应特性,基于 COMSOL 软件 AC/DC 模块中的磁场模块,建立高倾角含层内夹层的三维地层模型,在改变目的层厚度 H、倾角 θ 及层内夹层厚度 Hj 等参数的情况下,计算低阻围岩情况下(围岩电导率 0.1S/m,目的层电导率 0.01S/m)阵列感应仪器发射源位于不同位置h时的测井响应,通过 LiveLink™ for MATLAB® ... En savoir plus
In this paper, we use the PDE interface of COMSOL Multiphysics® software to implement the 2.5D frequency wave-number domain method to investigate the wave propagation in a deviated borehole penetrating a transversely isotropic formation. A convolutional perfectly matched layer is ... En savoir plus
This presentation deals with a density based topology optimization for multiphysics problems implemented in COMSOL Multiphysics. Using this method, we are going to design a heat exchanger for maximizing the performance under a constant input power. En savoir plus
We have proposed a high performance MEMS based microstructure array of micropreconcentrator (microPC) for breath diagnosis of cancer biomarkers. Our microPC has been designed based on quantitative analysis results, which gives explicit evaluation criteria for determination of ... En savoir plus
In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, ... En savoir plus
Debris, micro particles produced by discharges, stay in the gap area during deep hole machining by micro EDM, cause short-circuits and abnormal discharges, finally make machining impossible. Although a deep hole can be processed by using the tool with grooves on the surface, the effect ... En savoir plus
We studied the influence of a number of gas-liquid interface on the drag reduction effect by numeric simulation. Level set method was used for an analysis of gas-liquid interface. The analytic model is rectangular channel of height h = 5 micrometer and width w = 20 micrometer with two ... En savoir plus