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.

Numerical Simulation of Acoustic Properties of Porous Metals under High Sound Pressure Level Conditions

B. Zhang [1], X. Wang [1], L. Ni [1]
[1] School of Mechanical Engineering, Ningxia University, China

The sound propagation and absorption properties in porous media under high sound pressure level conditions have been reported elsewhere. Also several analytical and semi-analytical solutions have been developed; however, these solutions are relatively complicated and the provided results are not accurate enough yet. In this work, the simulated results for the study of the sound absorption ...

Radio Frequency Tissue Ablation Simulation with COMSOL Multiphysics® Software

N. Elabbasi [1], M. Hancock [1],
[1] Veryst Engineering, Needham, MA, USA

Radiofrequency (RF) tissue ablation is commonly used to treat medical conditions involving dysfunctional tissue especially in the heart, kidneys, lungs, bones, or liver. An electrode at the tip of a catheter delivers high frequency current (350-500 kHz) to the targeted tissue causing it to heat and then ablate without disturbing the electrical signals of the nervous system or heart, and with ...

Simulating an Adaptive, Liquid-Filled Membrane Lens with COMSOL Multiphysics® Software

V. S. Negi[1], H. Garg[1], B. Singh [2],
[1] Central Scientific Instruments Organisation, Chandigarh, India
[2] Chandigarh College of Engineering and Technology, Chandigarh, India

Adaptive optics control using liquid filled membrane lens is based on the principle of deflection of polymeric membrane. Controlled deflection in membrane leads to controlled focal length. This enhances the focus tuning ability of the system at the same time make optical system compact and economical. The adjustment of fluid pressure helps to toggle between different field of view at the same ...

带螺旋翅片的绕管负压换热器

王坤祥 [1],
[1] 中国科学院理化技术研究所,北京,中国

引言:超流氦低温系统的正常运行离不开负压换热器,在此选用绕管式的负压换热器。其工况为4.45K~2K之间,低压侧绝对压力3000Pa左右。软件中用到的模块有Livelink for Solidworks、Livelink for Excel、“非等温湍流 k-ε”接口。 结果:求解结果定性上正确,问题在于为了让换热器达到理想换热效果,需要更多匝数的绕管,对计算机要求很大,在该模型中只保留了10匝。

Thermal Model and Control of Metal-Organic Chemical Vapor Deposition Process

J. L. Ebert [1], S. Ghosal [1], N. Acharya [1]
[1] SC Solutions, Inc., Sunnyvale, CA, USA

Metal-Organic Chemical Vapor Deposition (MOCVD) is used for the manufacture of Multi-Quantum Well Light Emitting Diodes (MQW LEDs). The process uses a carrier gas flow containing a dilute mixture of metal organic precursors, Tri-Methyl Gallium (TMG) and Tri-Methyl Indium (TMI), to epitaxially deposit GaN and InGaN on a heated wafer of diameter ranging from 2" to 8". The gas mixture flows into a ...

Some Benchmark Simulations for Flash Flood Modeling

E. Holzbecher [1], A. Hadidi [1],
[1] German University of Technology in Oman, Muscat, Oman

Flash floods are sudden and mostly destructive rushes of water down narrow gullies or over sloping surfaces. They are mostly caused by heavy rainfall in the upstream watershed. They may also appear as result of catastrophic events as dam or levee breaks, or mudslides or debris flow. The occurrence of flash floods is determined by many factors, like intensity, location and distribution of the ...

EMC Simulation Using Source Reconstruction

A. Bergqvist [1], P. Jacobsson [1],
[1] Volvo Cars, Gothenburg, Sweden

Electromagnetic compatibility (EMC) is a growing issue in cars due to the increase in electrification of vehicles. Simulations can be useful for predicting issues at an early stage in the development cycle. This includes investigating EM stray fields that various components generate and are themselves exposed to. However, the situation is made more complicated by the fact that in many cases, ...

CFD Analysis of a Stirred Vessel Bioreactor with Double Pitch Blade and Rushton Type Impellers

A. Buss [1,2], A. Suleiko [2,3], K. Rugele [2], J. Vanags [3],
[1] Riga Biomaterials Innovation and Development Centre, Riga Technical University, Riga, Latvia
[2] Institute of General Chemical Engineering, Riga Technical University, Riga, Latvia
[3] Latvian State Institute of Wood Chemistry, Laboratory of Bioprocess Engineering, Riga, Latvia

Stirred tank bioreactors are used to simulate a natural biochemical environment for the optimum growth of cells (i.e. algae, microorganisms or tissues) in microbial and cell culture. Bioreactor types range from small (5 L and less) up to 15000 L systems for large-scale industrial applications. Regarding the purpose they can be batch, fed-batch or continuous flow. Tight control over parameters ...

Simulation of CMOS Compatible Sensor Structures for Dielectrophoretic Biomolecule Immobilization

H. Matbaechi Ettehad [1], S. Guha [1], C. Wenger [1],
[1] IHP, Frankfurt (Oder), Brandenburg, Germany

The aim of this paper is to optimize with COMSOL Multiphysics® simulation, the design geometry of a near field biosensor which could be used for dielectrophoretic (DEP) immobilization and simultaneous sensing of biomolecules of the order of nanometers to micrometers. COMSOL Multiphysics® was utilized with its various potential modules such as AC/DC, CFD and Particle Tracing Modules. DEP ...

COMSOL Modeling of a Submarine Geothermal Chimney

M. Suárez [1], and F. Samaniego [2]
[1]Faculty of Sciences, Michoacán University (UMSNH), Morelia, Michoacan, Mexico
[2]Faculty of Engineering Postgrade Studies Division, National University of Mexico (UNAM), Mexico City, Mexico

New geothermal energy sources hold promise for the future. Deep submarine geothermal energy related to hydrothermal vents is emerging in many places along the oceanic spreading centers. Shallow submarine geothermal systems are found near to continental platforms. We present the initial development of mathematical models to simulate the energy transport in submarine systems. A model for the ...