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.

Gauss's Law; Teaching Platform Using the Magic Cube: Implementation by COMSOL Multiphysics

H. Ghali, and A. Hossam
Electrical Engineering Department, British University in Egypt, Cairo, Egypt

Most probably Gauss\'s law is considered as the first \"electromagnetic\" concept for early undergraduate physics and electromagnetic courses. In early study year, teaching Gauss’s law is usually performed based on two main components; 1) The use of simple symmetrical charge distributions where a correct expectation of the spatial behavior of the electric flux density is possible and 2) The use ...

COMSOL Aided Design of an Extraction Pipe for the Electron Beam from a Plasma Focus Device

M. Valentinuzzi[1], E. Ceccolini[1], D. Mostacci[1], M. Sumini[1], F. Rocchi[2]
[1]Montecuccolino Nuclear Engineering Laboratory, University of Bologna, Bologna, Italy
[2]UTFISSM-PRONOC, ENEA, Bologna, Italy

The electron beam emitted backward by Plasma Focus devices is being investigated as a radiation source for IORT (Intra-Operative Radiation Therapy) applications. A Plasma Focus device is being developed to this aim. The electron beam is driven through an electron pipe made of stainless steel to impinge on a 50 ?m brass foil, where conversion X-rays are generated. Electromagnetic forces in the ...

Finite Element Simulation of Induction Heating of a Tubular Geometry

K. Madhusoodanan[1], J. N. Kayal[1], P. K. Vijayan[1]
[1]Bhabha Atomic Research Centre, Trombay, Mumbai, India

In Pressurised Heavy Water Reactors (PHWRs), the fuel bundles are located inside horizontal pressure tubes made of Zr 2.5 wt% Nb alloy. During reactor operation, pressure tubes undergo corrosion reaction with the heavy water coolant flowing through it and picks up a part of the hydrogen evolved. Assessment of the hydrogen concentration in the pressure tube forms part of the programme to assess ...

Integrated Ion Optics Design - new

T. Majoros[1], B. Sebök[1]
[1]Department of Atomic Physics, Budapest University of Technology and Economics, Budapest, Hungary

Introduction: This study aims the optimization and sensitivity analysis of an existing device. A Secondary Ion Mass Spectrometer (SIMS) device is to be equipped with a high power laser in order to increase sputtering speed. The modified device must be capable of handling the increased level of contamination and energy spread of sample ions. Use of COMSOL Multiphysics® software: Transmission ...

Design of a Dielectrophoretic Based Micropipette for Gene Expression Applications Using COMSOL Multiphysics® Software

D. Wijesinghe [1], K. Nawarathna [1],
[1] Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND, USA

We have used COMSOL Multiphysics® software to design a micropipette for single -cell gene expression profiling. The micropipette design allows us to insert it into a single-cell to extract genes through dielectrophoresis. As dielectriphoretic force depends on the applied electric field (E) and its gradient (∇E^2), we have successfully used COMSOL to calculate E and ∇E^2 in the vicinity of the ...

安装在有限大障板上的轴对称扬声器特性的近似计算方法

陆晓 [1], 温周斌 [1],
[1] 浙江中科电声研发中心,嘉善,浙江,中国

使用 COMSOL Multiphysics® 仿真轴对称扬声器一般可采用 2D 轴对称模型,但在这种坐标系下无法建立扬声器测量中常用的矩形障板模型,而选择计算安装在无限大障板上扬声器的声特性,其仿真计算结果又与常见的标准障板上的测量结果在中低频段存在较大差异。 为了使无限大障板上的仿真结果与标准障板(或其它有限大障板)上的测量结果相一致,提出一种方法,利用 COMSOL 软件的 Parameter Sweep 功能,通过多次进行 2D 轴对称的电磁场、结构力学和声学三场耦合的扬声器仿真计算及相应后处理,得到安装在有限大障板上的扬声器正前方的声特性。 采用该方法可在较短时间内比较准确地计算得到安装在任意形状的有限大障板上的扬声器的声压级和谐波失真等特性。如图1和图2所示,采用该方法得到的声压级和总谐波失真曲线(红色),与测量结果(黑色)趋势和细节都比较一致。 ...

Implicit Large Eddy Simulations of 2D Flow and Heat Transfer in Thermoacoustic Resonators

N. Martaj [1,2], S. Savarese [3], S. Kouidri [3], M. M. ALI [4,5]
[1] EPF Ecole d’ingénieurs, Montpellier, France
[2] Institut d'Electronique et des Systèmes, Université de Montpellier, Montpellier, France
[3] Armélio, Les Ulis, Courtabœuf, France
[4] LIMSI-CNRS, Orsay, France
[5] UPMC Univ Paris 06, Paris, France

The reduction of energy consumption in the building sector (nearly 40% of the energy consumption in Europe) is a real challenge to achieve the objective of the “2020 European climate and energy package”. In recent years, great interest is observed for the Stirling thermoacoustic machines. Nonlinearities due to the high level of acoustic pressure generate DC flows that are superimposed on the ...

Simulation of a Thermoelectric Spiral Structure

A. Arevalo [1], J. P. Rojas [1], D. Conchouso [1], M. M. Hussain [1], I. G. Foulds [2]
[1] Computer, Electrical and Mathematical Sciences and Engineering (CEMSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia
[2] The University of British Columbia, School of Engineering, Okanagan Campus, Canada

Energy efficiency and harvest, speed and performance, flexibility and portability are key elements for innovation in the current consumer electronics markets. Thermoelectric Generators can convert energy from heat gradients into electricity. Every source of heat from an electronics device can potentially be used as a source of energy. This generators have the advantage of: being silent, compact, ...

Simulation of an Immunodetection System Based on Magnetic Nanoparticles

A. Rabehi [1], H. Kokabi [1], L. Chen [2], K. A. Ngo [3], H.-J. Krause [2]
[1] Sorbonne Universités, Laboratoire d’Electronique et Electromagnétisme, Paris, France
[2] Peter Grünberg Institute, Bioelectronics, Forschungszentrum Jülich, Germany
[3] Sorbonne Universités, Laboratoire Interfaces et Systemes Electrochimiques (LISE), Paris, France

In a first approach towards application of the magnetic frequency mixing technique to microfluidic structures, microplanar coils have to be designed along with sample reservoir. For this, a COMSOL Multiphysics® electrical model along with an analytical calculation is used in order to optimize the dimensions of the coil. This is to ensure a proper distribution and value of magnetic flux density ...

Numerical Study of a DC Electromagnetic Liquid Metal Pump: Limits of the Model

N. Kandev[1]
[1]Institut de recherche d'Hydro-Québec, Shawinigan, QC, Canada

This work presents the results of a 3D numerical magneto-hydrodynamic (MHD) simulation of an electromagnetic DC pump for liquid metal using a rectangular metal flow channel subjected to an externally imposed transversal inhomogeneous magnetic field. In this study. 3D numerical simulation based on the finite element method was carried out using the computer package COMSOL Multiphysics 3.5a. The ...