Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abrangem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Modeling Radiofrequency Ablation of a Spherical Breast Tumor

R. Repaka [1], S. Singh [1], , ,
[1]Indian Institute of Technology Ropar, Rupnagar, Punjab, India


A three-dimensional heterogeneous model of breast has been modeled with a spherical tumor of 1.5 cm. PID controller has been used to perform temperature-controlled RFA of breast tumor. The coupled effect of blood perfusion and variable conductivity during RFA has been investigated. The effect of set target temperature on ablation volume, temperature distribution and input voltage requirements ...

Optimization of Device Geometry of a Fully-Implantable Hearing Aid Microphone

A. Dwivedi [1], G. Khanna [1],
[1] National Institute of Technology Hamirpur, Himachal Pradesh, India

The hearing impairment is affecting more than 360 million people all over the world.In India alone, 63 million people suffer from the significant auditory loss. Conventional hearing aids suffer from reliability, practicality and social stigma concerns. The totally implantable devices provide freedom from the social and practical difficulties of using conventional hearing aids. The paper presents ...

Electric Field Induced Patterning in Thin Films

A. Atta [1], S. Dwivedi [1], Vivek [1], R. Mukherjee [1],
[1] Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India

Interfacial structures/pattern, especially with small-scale dimensions, are important to the chemistry of materials in determining the optical, electrical, mechanical, or other physical properties of novel materials. Polymers are often used for surface patterning. The diversity, the relatively low cost, the convenient mechanical properties and the compatibility with most patterning techniques ...

Multiphysics Analysis of Inductive Brazing Process using COMSOL Multiphysics® Software

A. F. Biju[1], A. Pandey [1],
[1] Honeywell Technology Solutions Lab, Bangalore, Karnataka, India

The objective is to analyze temperature rise and distribution in different parts of an inductive brazing process. This process includes multiphysics phenomena - electromagnetic excitation- eddy heating- heat transfer in solids. AC Inductive heating physics coupled to heat transfer in solid including conduction, convection and radiation effects are modeled using COMSOL Multiphysics® Software.

基于声学超材料的菲涅尔声透镜

韩建宁 [1], 罗世通 [1],
[1] 中北大学,太原,中国

基于声学透镜的声学聚焦技术已经在医学检测及医学治疗中有着广泛应用,特别是在 HIFU 技术中有着重要的地位。虽然近几年声学聚焦技术已经有着很多的成果,但是由于“衍射极限”的问题,聚焦区域有一定的限制。声学超材料技术是当前物理领域的热点,该技术的相关成果和优势已经渗透到多个学科的研究中。本文为了更好地抓住学科交叉的技术优势,发挥声学超材料在声学聚焦技术中的优势,使用 COMSOL Multiphysics® 进行了水下聚焦超声技术研究,得到了较好的实验效果。这些研究对推动我国的声学透镜技术研究有较大的帮助,对基于 COMSOL 的有限元分析声学透镜技术有较大的借鉴。

A Reliable Approach to Estimate Surface-enhanced Raman Scattering Intensity of Metal Nanostructures

En-Ming You [1], Jun Yi [1], Song-Yuan Ding [1,2],
[1] State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
[2] Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen, China

Surface-enhanced Raman scattering (SERS) is a fingerprint spectroscopy whose sensitivity is down to single molecule level. The mechanism of SERS is mainly contributed to huge enhancement of local electric field, which originated from surface plasmon resonance of metal nanostructures. It is very important to exactly calculate the local enhancement in the electric field strength for right ...

Metamaterial Based Patch Antenna with Broad Bandwidth Designed by COMSOL Multiphysics® Software

李学识 [1], 郑李娟 [1],
[1] 广东工业大学,广州,中国

A patch antenna based on metamaterials of composite split-ring-resonators (CSRRs) and strip gaps is designed with COMSOL Multiphysics® software. The antenna is constructed by using CSRR structures in forms of circular rings on the patch and employing strip gaps on the ground plane. The signal is fed by a common microstrip line that connects the patch and the input port. The antenna is based on a ...

Local Electroporation of Single Adherent Cells by Micro-Structured Needle Electrodes

K. K. Sriperumbudur[1], P. J. Koester[1], M. Stubbe[1], C. Tautorat[1], J. Held[2], W. Baumann[1], and J. Gimsa[1]
[1] University of Rostock, Chair of Biophysics, Gertrudenstr. 11a, 18057 Rostock, Germany
[2] Microsystem Material Laboratory, Department of Microsystems Engineering (IMTEK), University of Freiburg, Germany

In spite of its low throughput, Patch-Clamp is the established method for intracellular measurements of the transmembrane potential. To address this problem, we have developed new biosensor-chips with micro-structured needle electrodes (MNEs). MNE-penetration of single cells growing on the MNE-tips leads to a situation comparable to the whole-cell mode in classical Patch Clamp. MNE-penetration ...

Numerical Investigation of Electroosmotic Flow in Convergent Divergent Micronozzle

V. Gnanaraj[1], V. Mohan[1], and B. Vellaikannan[1]
[1]Thiagarajar College of Engineering, Madurai, Tamilnadu, India

A fundamental understanding of the transport phenomena in microfluidic channels is critical for systematic design and precise control of such miniaturized devices towards the integration and automation of Lab-on- a-chip devices. Electroosmotic flow is widely used to transport and mix fluids in microfluidic systems. Electroosmotic transport in convergent divergent micronozzle is significant in ...

Benefits of COMSOL Multiphysics® Version 4

Ed Fontes
Chief Technology Officer, COMSOL

Ed Fontes is CTO at COMSOL with specific interest in the transport-reaction products. He has 14 years experience of modeling transport phenomena in industry and 6 years of supervising research projects in Academia. Ed Fontes received his PhD in Electrochemical Engineering from the Royal Institute of Technology (Stockholm, Sweden) in 1995.