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.
COMSOL-News-Magazine-2017
COMSOL-News-Magazine-2017-Special-edition-acoustics
COMSOL-News-Magazine-2016

Plasma Edge Simulations by Finite Elements using COMSOL

C. Hollenstein, and A. Howling
Ecole Polytechnique Fédérale de Lausanne, Switzerland

Finite elements using COMSOL Multiphysics have been used to simulate the edge plasma in a large area capacitively coupled RF reactor. In order to reduce numerical difficulties simplified reactor edge geometries have been used. First results show the importance of electrostatic double layers within this plasma. In addition the non-uniform behaviour of the plasma sheath around convex and ...

COMSOL Multiphysics® Simulation of the Electrokinetic Effect in Gidrogeology

M. A. Narbut [1], K. V. Titov [1], P. K. Konosavsky [1],
[1] Saint Petersburg State University, Saint Petersburg, Russia

The groundwater flow is accompanied by the electric field with potential called usually the streaming potential or the Self-Potential (SP) to be measured on the ground surface (e.g., Rizzo et al., 2004; Bolève et al., 2007; Jardani et al., 2009). We studied numerically the SP signals associated with pumping test experiments in layered aquifers using COMSOL Multiphysics® software and GWFGEM ...

Numerical Simulation of Vibrationally Active Ar-H2 Microwave Plasma

F. Bosi [1], M. Magarotto [2], P. de Carlo [2], M. Manente [2], F. Trezzolani [2], D. Pavarin [2], D. Melazzi [2], P. Alotto [1], R. Bertani [1],
[1] Department of Industrial Engineering, University of Padova, Padova, Italy
[2] CISAS "G.Colombo", University of Padova, Padova, Italy

Microwave discharges have a wide range of applications, such as gas conversion, material processing and surface treatment; also they can provide an efficient way for dissociation of molecular gases as CO2 and N2O. Depending on the operating pressure and temperature, non-equilibrium conditions can be attained within the discharge, where electron temperature, vibrational temperature and ...

A Comparison of Discrete Fracture Models for Single Phase Flow in Porous Media Using COMSOL Multiphysics® Software

C. A. Romano-Pérez [1], M. A. Díaz-Viera [2],
[1] Facultad de Ingeniería, Universidad Nacional Autónoma de México, Coyoacán, DF, México
[2] Ingeniería de Recuperación Adicional, Instituto Mexicano del Petróleo, Gustavo A. Madero, DF, México

A comparison of discrete fracture and explicit fracture models for single-phase flow in fractured porous media using COMSOL Multiphysics® software is presented to understand the contribution of each individual fracture to fluid flow, and the exchange between fracture and surrounding medium at a scale such that the fractures could be modeled explicitly. The derived flow models are based on the ...

Numerical Study on the Mechanism of Interface Debonding Detection for CFST with PZT

H. Chen [1], J. Li [1], S. Xia [2],
[1] Hunan University, Changsha, Hunan, China
[2] Xi'an Jiaotong University, Xi'an, Shaanxi, China

Introduction In order to understand the detection mechanism of the PZT based nondestructive testing (NDT) technology for interface debonding of CFSTs, numerical simulation on a multi-physical model composed of surface-mounted PZT patches and CFST structural member is established in COMSOL Multiphysics®. The stress propagation process and the electrical signal output of an embedded PZT patch as ...

Hydro-Mechanical Modelling of a Shaft Seal in a Deep Geological Repository

D. Priyanto
Atomic Energy of Canada Limited, Pinawa, MB, Canada

The hydro-mechanical (HM) numerical simulation of a shaft seal installed at a fracture zone in a hypothetical host rock using COMSOL is presented. Two different stages are considered in the numerical modelling. Stage 1 simulates the groundwater flow into an open shaft. Stage 2 simulates the groundwater flow after installation of shaft sealing-components. The shaft sealing components include: ...

Design and Development, via Prototype Testing and Multiphysics Modelling, of a Thermoelectric Generator (TEG) for Integration in Autonomous Gas Heaters

M. P. Codecasa[1], C. Fanciulli[1], R. Gaddi[2], F. Gomez Paz[3], and F. Passaretti[1]
[1]National Research Council of Italy - IENI Institute, Lecco, Italy
[2]Italkero S.r.l., Modena, Italy
[3]Studio di design Francisco Gomez Paz, Milano, Italy

An autonomous gas-heater for outdoor environments was selected as a test-case for cogeneration in gas-heaters and stoves, permitting installation and operation without need of an electrical network connection. A thermoelectric generator (TEG) was designed, converting part of produced heat into electrical power for auxiliaries (ventilation) or ancillary functions (illumination). Design approach, ...

Computational Fluid Dynamics (CFD) Simulation of Multiphase Flow in Biogas Digester

V. S. Kshirsagar[1], P. M. Pawar[1]
[1]SVERI's College of Engineering, Pandharpur, Maharashtra, India

Effective suspension and settling are critical for controlling biomass retention in a biogas digester. This paper developed a Computational Fluid Dynamics (CFD) model to simulate the hydrodynamic characteristics of multiphase flow in biogas digester. This is carried out by using COMSOL Multiphysics® software for understanding the behavior of slurries of different viscosity. This study helps to ...

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 ...

SD Numerical Simulation Technique for Hydrodynamic Flow Gas-Solids Mixing

I. Mantilla[1], S. De Vicente[2]
[1]National University of Engineering, Lima, Perú
[2]Polytechnic University of Madrid, Madrid, Spain

We formulate a new mathematical model of gas-solids mixing hydrodynamic flow [1] in a combustion chamber with a fluid bed system used in the combustion of mineral coal waste. This model in study is called Model Gas-Solids Mixing and it is constructed by averaging the conservation equations (mass and momentum) for a two-phase flow, which takes into account the existence of a small parameter rho ...