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Pulsed Power Accelerator Design with COMSOL Multiphysics® Software - new

D. Reisman[1]
[1]Sandia National Laboratories, Albuquerque, NM, USA

We have developed Thor: a pulsed power accelerator for performing dynamic material experiments. The design was aided by using the COMSOL Multiphysics® software with the AC/DC Module and RF Module. Our design process involved optimizing the impedance of the system while maintaining a good margin against electrical breakdown. By using a three-dimensional electromagnetic model of the entire power ...

Design of Microwave Cavity for Non-Thermal Plasma Generation - new

N. Manivannan[1], W. Balachandran[1]
[1]Brunel University, Uxbridge, UK

Design of Microwave Resonance Cavity (MRC) to generate non-thermal plasma to treat NOx and SOx from marine diesel engine is presented in this paper. Microwave frequency of 2.45GHz is used generate the required plasma. A number of wave guides are used to transfer the microwave energy into to MRC from the microwave source. COMSOL multi-physics software is used to model the waveguides and to ...

Purcell Effect via Numerical Simulation - new

I. Zabkov [1], V. Klimov[1], A. Pavlov[1], D. Guzatov[2]
[1]All-Russia Research Institute of Automatics (VNIIA), Moscow, Russia
[2]Yanka Kupala State University of Grodno, Grodno, Belarus

As it is known nano-sized emitters (such as atoms, quantum dots and point defects in diamonds) interaction with nano-environment leads to drastic changes of their decay rate and therefore lifetime (Purcell effect). To calculate the influence in general one needs to solve equations of quantum electrodynamics. However in weak interaction limit these emitters can be considered as point electric ...

Modelling of Reactive Non-Isothermal Mixture Flow and its Simulation in COMSOL Multiphysics® Software - new

V. Orava[1,2], O. Soucek[1], P. Cedula[2]
[1]Charles University in Prague, Prague, Czech Republic
[2]Zurich University of Applied Sciences, Winterthur, Switzerland

I introduce a model of fluidized reactor which, in presence of heterogeneous platinum-based catalyst, decomposes liquid formic acid producing gaseous mixture of carbon dioxide and hydrogen as the product. I treat the physical system as a (Class II) mixture of four constituents - namely formic acid (FA), Platinum micro-pellets (Pt), carbon dioxide (CO_2) and hydrogen (H_2) - which can be, without ...

Optimization and Simulation of MEMS Based Thermal Sensor for Performance of Transformer Oil

V. Vijayalakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

In this work, a bimetallic strip based thermal sensor was designed using MEMS module of COMSOL Multiphysics® software to monitor the temperature rise in insulating oil which was used as coolant in transformers. The bimetallic strip was designed with different shapes such as cylindrical, rectangle, square & conical and different compositions such as Al/Steel Alloy and Fe/Cu which can withstand ...

Iberian COMSOL Multiphysics Conference

The Organizing Committee of the Iberian COMSOL Multiphysics Conference 2014

In the conference we bring together a community that is scientifically diverse in an event about the use of COMSOL Multiphysics. Oral and poster presentations highlight achievements in multiphysics modeling and simulations using COMSOL.

Particle Concentration Effect On Dielectrophoretic Trapping

M. A. Saucedo-Espinosa [1], B. H. Lapizco-Encinas [2],
[1] Department of Microsystems Engineering, Rochester Institute of Technology, Rochester, NY, USA
[2] Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, NY, USA

Dielectrophoresis (DEP) is an electric field driven technique that has important applications in the enrichment, concentration and isolation of biological and non-biological particles. The assessment of particle trapping capacity using DEP, however, has been qualitative in nature; since current mathematical models are in an early stage and more sophisticated models are under development [1]. ...

Transient Model of a Fluorine Electrolysis Cell

J. Vukasin [1], I. Crassous [1], B. Morel [1], J. Sanchez-Marcano [2], P. Namy [3]
[1] HRP, AREVA NC, France
[2] Institut Européen des Membranes - CNRS, France
[3] Simtec, France

In the nuclear fuel cycle, fluorine is produced by the electrolysis of the molten salt KF-2HF. It is a complex process to study since hydrofluoric acid and fluorine are hazardous and highly corrosive. A 3D-model of a lab-scale fluorine electrolysis cell has been developed to increase our understanding of this process, using the electric currents and the bubbly flow interfaces to simulate the ...

AlGaInAs/InP Hexagonal Resonator Microlasers with a Center Hole

H. Weng [1], Y. Yang [1], B. Liu [1], X. Ma [1]
[1] Institute of Semiconductors, Chinese Academy of Science, Beijing, China

In the past decades, equilateral polygonal microcavity lasers with whispering-gallery modes (WGMs) have attracted great attentions due to their potential application in photonic-integrated circuits. Compared to the perfect microdisk without deformation, the polygonal microcavities such as triangle, square, hexagonal and octagonal can easily realize the light directional emission and single mode ...

方便餐盒微波加热特性研究

宋春芳 [1], 王燕 [1], 金光远 [1], 崔政伟 [1],
[1] 江南大学,无锡,江苏,中国

方便餐盒微波加热特性研究 宋春芳※ 王燕 金光远 崔政伟   (江苏省食品先进制造装备技术重点实验室,江南大学机械工程学院,江苏,无锡,214122) 摘要:本文采用 COMSOL Multiphysics® 建立了电磁与传热耦合的仿真模型,研究方便餐盒微波加热传热特性规律,模型包括加热腔、波导以及可旋转的转盘和物料,通过比较不同转速对仿真结果的影响,选用 7.5rpm 作为转盘转速。研究结果表明,微波功率为 700W,90s 的微波加热后,方便餐盒空间温度场分布和瞬态温度曲线与实验结果基本保持一致,微波仿真模型可行,研究结果为方便餐盒的微波快速加热及工业化生产与加工提供一定的理论依据。 关键词:微波;仿真;转盘;传热;转速