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.

Structural Mechanics for Real Geometry of Basalt Woven Composites

J. Salacova[1]
[1]Technical university of Liberec, Department of Material Engineering, Liberec, Czech Republic

Woven composites with basalt reinforcement plain 1x1 are examined to define structural mechanics. Woven composites were created by the prepreg technology, 8 layers of plain-weave basalt fabrics were saturated by the precursor, polysiloxane matrix Lukosil®, and joint pressed during temperatures of 200°C and 600°C. The yarns consist of 8000 fibres assembled without twisting. Voids complete entire ...

Convective Cooling of Electronic Components - new

J. S. Crompton[1], H. Singh[1], K. Koppenhoefer[1]
[1]AltaSim Technologies, LLC, Columbus, OH, USA

In response to continued miniaturization and increased multi-functionality of electronic circuits, the number of integrated circuit (IC) packages on the circuit board continues to increase. As a consequence the operating power density increases and significant increases in the operating temperature of devices result. To maintain operation and long term performance device temperature must be ...

Simulation of Normal and Cancerous T-cell Membrane Electroporation - new

O. Henao[1], V. Gómez[1], I. De la Pava[1], J. Sánchez[1]
[1]Grupo Fisiología Celular y Aplicada, Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia

Electroporation is an increase of the cell membrane permeability due to the formation of aqueous pores in it when the cell is under the influence of an intense electric field [1][2]. The formation of such pores in the membrane can be used to enhance the uptake of chemotherapeutic drugs into the cell in a cancer treatment known as electrochemotherapy [3]. In some cases the direct experimental ...

Micromachined Silicon Integrating Cavities for Far-Infrared Bolometer Arrays - new

M. Audley[1], G. de Lange[1], G. Keizer[1], C. Bracken[2]
[1]SRON Netherlands Institute for Space Research, Groningen, The Netherlands
[2]National University of Ireland, Maynooth, Co. Kildare, Ireland

We are investigating gold-plated micromachined silicon integrating cavities for arrays of far infrared Transition Edge Sensor bolometers. We present the results of our simulations and show how we used COMSOL Multiphysics® software to optimize the geometry of the integrating cavity. We show that we can achieve a high optical efficiency over a wide frequency range.

Temperature Gradients Controlled Broadband Acoustic Omnidirectional Absorber - new

F. Qian[1], L. Quan[1], X. Liu[1]
[1]Institute of Acoustics and School of Physics, Nanjing University, Nanjing, China

Previous research into acoustic omnidirectional absorber (AOA) has shown the feasibility of forming acoustic black hole to guide the incident wave into the central absorptive cavity. However, major restrictions to practical applications exist due to complexity of designing metamaterials and unchangeable working states. Here, we propose two cylindrical, two-dimensional AOA schemes based on ...

Statistical Modeling and Contact Analysis of RF MEMS Surface

J. Liu [1], V. B. Chalivendra [1], C. Goldsmith [2], W. Huang [1],
[1] Department of Mechanical Engineering, University of Massachusetts - Dartmouth, Dartmouth, MA, USA
[2] MEMtronics Corporation, Richardson, TX, USA

Radio frequency (RF) micro-electro mechanical system(MEMS) switch works in on/off modes controlled by electrostatic forces. In off mode, rough surfaces of electrodes come into a contact to shunt the RF signal. Surface contact area has been recognized as a key factor in RF MEMS performance and reliability. Multi scale regular-fractal structure is observed on MEMS surface. Nonlinear Structural ...

First Approach Toward a Modeling of the Impedance Spectroscopic Behavior of Microbial Living Cells

D. Rauly [1], P. Xavier [1], E. Chamberod [2], J. M. F. Martins [3], J. Angelidis [4], H. Belbachir [5]
[1] IMEP-LAHC, Universite Grenoble Alpes, France
[2] IUT, Universite Grenoble Alpes, France
[3] LTHE, Grenoble Alps University - CNRS - IRD, France
[4] LEAS, St. Ismier, France
[5] HBA Biotech SA, Grenoble, France

The subject of the interactions between electromagnetic (EM) fields and living cells is a strong issue for several decades [1]. Large number of works have been done to study the EM field penetration and inner induced currents in living microorganisms. Relevant information to be collected deals with level and frequency of the EM signal that may affect the development of the considered cells. The ...

Time-Domain Model of the Inner Ear to Study Nonlinear Responses

K. Gladine [1], J. Soons [1], J. Dirckx [1]
[1] University of Antwerp, Belgium

The ear doesn’t solely listen but it also speaks. Sounds formed in the inner ear which are measurable in the outer ear are called Otoacoustic emissions (OAEs). Some claim these are produced by the outer hair cells (OHCs), the amplifiers in the inner ear. Our hypothesis is that the OHCs only amplify distortion products (DPs) but do not produce them.

A COMSOL Multiphysics® App for the Thermal Analysis of Electronic Devices

G. Petrone [1], C. Barbagallo [1], M. Scionti [1],
[1] BE CAE & TEST, Catania, Italy

Among the new features introduced by the latest versions of COMSOL Multiphysics® software, the opportunity of building up customized model interfaces by exploiting the Application Builder is for sure one of the most promising. Arising from this concept, the Certified Consultant BE CAE & Test presents a COMSOL app to analyze the thermal behavior of an electronic Surface-Mount Device (SMD). The ...

Geometric Multigrid Solver and Experimental Validation in Laser Surface Remelting

M. M. Pariona [1], F. de Oliveira [1],
[1] State University of Ponta Grossa, PR, Brazil

INTRODUCTION The purpose of this work is to verify the effect of Multigrid method on the CPU time for the resolution of the heat transfer model, based on the Finite Element Method (FEM), in order to simulate the laser surface remelting (LSR) of the Al–1.5 wt.% Fe alloy. To accelerate the convergence of Single grid methods, Multigrid method (MG) was employed in order to reduce the CPU time. In ...