Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Model of Microwave-Assisted Thermal Adhesion of Synthetic Leather to a Plastic Substrate

S. Soldatov [1], J. Meiser [2], B. Lepers [1], G. Link [1], J. Jelonnek [3],
[1] Karlsruhe Institute of Technology (KIT, IHM), Karlsruhe, Germany
[2] Carl Meiser GmbH & Co. KG, Albstadt, Germany
[3] Karlsruhe Institute of Technology (KIT, IHM, IHE), Karlsruhe, Germany

The lamination of substrates with thin coatings is commonly used in furniture, automotive and avionic industries. In the lamination process the hot melt adhesives are widely used and typically activated at temperatures from 80°C to 140°C by resistive heating. This requires a heat transfer through the coating and/or the substrate. To make the process more flexible, to decrease its energy ...

A Novel Plug n Play MEMS-Based DNA Microarray

K. Jindal [1], V. Grover [1], B. Nayak [1],
[1] Birla Institute of Technology and Science - Pilani, Ghaziabad, Uttar Pradesh, India

Microarrays are extensively used in modern biology as tools of multiplexed, high throughput analysis to study thousands of genes and their expression inside cells at once [1]. The basic principle of a microarray is quantitative detection of fluorophore tagged DNA. Use of this method results in microarray experiments being expensive and complex due to fragile and costly fluorophores and ...

Study of Fracture Parameter for Curved Cracked Bimodular Flexural Specimen Using COMSOL Multiphysics® Software

A. Bhushan [1], S.K. Panda [1],
[1]Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh, India

The formulation of bimodular stress field is based on stress dependent elasticity and the simulations have been carried out using commercial finite element software COMSOL Multiphysics® software. The complexity of the problem is enhanced due to adding bimodular stress field in the evaluation of complex J-integral ( ˆ F J ) for curve cracked geometry subjected to flexural loading. The complex J ...

Influence of Non-Newtonian Blood Viscosity on Wall Pressure in Right Coronary Arteries with Serial Stenoses

B. Liu [1]
[1] Monmouth University, West Long Branch, NJ, USA

Three dimensional mathematical models are developed to simulate the blood flows in patient specific right coronary arteries with two stenoses. Simulations are carried out with various flow parameters under physiological conditions. Both Newtonian and non-Newtonian blood viscosity models are applied in the simulations to examine the influence of non-Newtonian viscosity of blood on the wall ...

Simulation of a Microwave Applicator for the Treatment of Petroleum Emulsions

A. V. Vazquez [1, 2], P. M. G. Vite [3],
[1] Universidad Politécnica de Altamira, Altamira, Tamaulipas, México
[2] Universidad Tecnológica de Altamira, Altamira, Tamaulipas, México
[3] TEC/NM, Instituto Tecnológico de Ciudad Madero, Ciudad Madero, Tamaulipas, México

In Mexico there is a decline in the production of oil deposits due to the lack of effective treatment of oil emulsions, which generate a problem in the reinjection of emulsified water, transport of oil with high water content and corrosion in the oil refineries. Through the simulation in COMSOL Multiphysics® software, specifically the modules of RF, Heat Transfer and the Materials library, it ...

A Simple Particle Saltation Model Using Computational Fluid Dynamics

A. Landázuri [1], V. Benavides [1],
[1] Chemical Engineering Department, GICAS Group, Universidad San Francisco de Quito, Quito, Ecuador

A three-dimensional model of particle saltation using computational fluid dynamics (CFD) is presented. This model domain reproduces a flat and irregular terrain with uniform roughness. The domain extends 2 m in X, 0.5 m in Y and 0.5 in Z for both cases. The model includes the motion of particles due to shear force, gravity, drag and the effect of turbulence as a result of the retardation of the ...

COMSOL® Simulation of Blister Actuated Laser Induced Forward Transfer (Ba-LIFT)

M. Morales [1], , J. J. Moreno [1] , D. Munoz-Martin [1] , C. Molpeceres [1]
[1]Centro Láser UPM, Universidad Politécnica de Madrid, Madrid, Spain

Laser-induced forward transfer (LIFT) is a non-contact direct-write technique that enables the deposition of small volumes of material into user-defined high-resolution patterns with a wide range of structural and functional materials. There are many variations of the LIFT process, each differing in how the laser is absorbed and converted into the mechanical energy required for material ejection ...

基于 COMSOL 软件的硅通孔的多物理场分析

刘永磊 [1],
[1] 西安电子科技大学北校区机电工程学院,西安,陕西省,中国

硅通孔在实现高级集成系统中起着至关重要的作用,但是其发展受到多物理场耦合效应的极大阻碍。硅通孔的多物理场耦合过程非常复杂,热场分布、电磁场分布及结构分布是相关联、相互作用的。针对硅通孔的多物理场耦合问题,本文开展了硅通孔多物理场仿真分析研究。结合国内外在硅通孔多物理场本质研究的基础上,从多物理场耦合理论出发,建立单个硅通孔的多物理场分析模型。通过运用 COMSOL Multiphysics 软件进行建模如图 1,在稳态下选择相应的焦耳热和热膨胀接口进行仿真如图 2,经影响分析确定了硅通孔的一些结构参数,如二氧化硅隔层厚度取 0.8um,硅基质厚度取 5.5um,硅通孔高度取 83.6um。最后,选择焦耳热接口进行瞬态仿真,研究了电压周期函数的幅值大小和占空比对硅通孔温度变化的影响关系。数值结果表明,随着幅值的增大,最终稳定后,温度的波动范围和最高温度都将增大如图 3;随着占空比不断增大 ...

石墨烯包裹海绵处理水面原油泄露问题

王永超 [1], 葛进 [1],
[1] 中国科学技术大学

海上石油泄漏不仅造成资源的浪费,还长期威胁着脆弱的生态系统。然而浮油具有面积大、油层薄、粘度大的特点,难以采用传统的技术和材料来有效地处理。作者利用石墨烯海绵疏水亲油、导电的特点,设计了一种原位加热的方法,有效地较低了原油的粘度,增大了油在海棉里的扩散系数,在解决快速吸附高粘度原油这一世界性难题方面取得了突破性进展。 在这个研究工作中,作者发现很难在实验上获得此方法的能量消耗情况,为了回答这个问题,作者应用 COMSOL® 软件,模拟了石墨烯海绵加热吸油的热传导过程。运用电流模块,模拟石墨烯泡沫通电加热升温的过程,用热传导模块模拟热量通过石墨烯泡沫传递到油、水、空气的过程,并且对电极分布方式进行了优化。作者统计了热量散失在各个组分的比例,结果表明,只有少部分的热量散失在水中,比起传统的电阻丝加热浮油的方法,能耗减少了 65%。

Numerical Demonstration of Finite Element Convergence for Lagrange Elements in COMSOL Multiphysics

M. Gobbert, and S. Yang
Department of Mathematics and Statistics, University of Maryland, Baltimore, MD, USA

The convergence order of finite elements is related to the polynomial order of the basis functions used on each element, with higher order polynomials yielding better convergence orders. However, two issues can prevent this convergence order from being achieved: the lack of regularity of the PDE solution and the poor approximation of curved boundaries by polygonal meshes. We show studies for ...