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 abramgem 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.

FEM Analysis of Contaminant Transport in a Loamy Desert Soil

B. Agasanapura, C. Nesbitt, and M. Misra
Chemical and Metallurgical Engineering, University of Nevada, Reno, Nevada, USA

In the present work, transport and adsorption of contaminants (lead, cesium) on loamy desert soil was modeled using the Finite Element Method (FEM). The Advective dispersion reaction mechanism was employed to describe the contaminant transport in soil medium. A partial differential equation (PDE) obtained from unsteady mass balance was developed using convective diffusion, solute adsorption, and ...

Image Based-Mesh Generation for Realistic Simulation of theTranscranial Current Stimulation

R. Said[1], R. Cotton[1], P. Young[1], A. Datta[2], M. Elwassif[2] , and M. Bikson[2]
[1] Simpleware Ltd, Exeter, Devon, UK
[2] Department of Biomedical Eng., The City College of New York, New York, NY, USA

This paper will discuss the comprehensive solution adopted for converting the 3D digital/medical images directly into the computational model. The workflow using Simpleware Software – ScanIP and + ScanFE – will be illustrated including the option for directly exporting fully compatible models to COMSOL Multiphysics. The extra functionality that allows introduction, positioning and ...

Computational Simulation of Electrohydrodynamic Systems Pertaining to Micro and Nano scale Fluid Flow Phenomenon

M. Seiler[1], and B. Kirby[2]
[1]Department of Engineering Physics, Cornell
University, NY, USA
[2]Department of Mechanical Engineering, Cornell
University, NY, USA

Modeling of 3D AC electro-osmotic pumps is relevant to the creation of portable or implantable lab-on-a-chip devices for mm/s tunable fluid flows attainable with battery scale voltages. In this analysis using COMSOL Multiphysics we investigate the modeling challenges of computationally calculating systems of fluid flow phenomena governed by AC Electroosmosis in the micro and nano scale regimes.

Numerical Investigation of a Time-dependent Magnetic Actuation Technique for Tagging Biomolecules with Magnetic Nanoparticles in a Microfluidic System

A. Munir, J. Wang, Z. Zhu, and H.S. Zhou
Worcester Polytechnic Institute, Worcester, MA, USA

The magnetic body forces that act on mono-dispersed magnetic nanoparticles (MNPs) tagged biomolecules in a microfluidic system can be efficiently used in various applications that involve separation and detection including DNA and protein analysis, bio-defense, drug delivery, and pharmaceutical development. In this work, we report an FEM model to demonstrate a novel method of tagging ...

Modeling of the Impact of Blood Vessels Flow on the Temperature Distribution During Focused Ultrasound Exposure

K.C.P. Li, B.E. O'Neill, and E. Sassaroli
Methodist Hospital Research Institute, Houston, TX, USA

Focused ultrasound systems guided by magnetic resonance imaging (MRI) and thermometry have recently made possible the non-invasive thermal ablation of benign tumors such as uterine fibroids in clinical practice. Much more work is however required in order to make this technology available for the treatment of other forms of cancer. One of the major difficulties is associated with the presence of ...

Modeling an Oscillating Water Foil for Hydro-kinetic Power Generator Using COMSOL 3.5a

R. Kallenberg[1], R. Han[2], and J. Cherry[2]
[1]Kallenberg Enterprises, Fairbanks, AK, USA
[2]University of Alaska Fairbanks, Fairbanks, AK, USA

The research team has devised and patented an oscillating, hydro-kinetic power-generating device for use in river and tidal environments. The interaction of water and the designed foil in a straight rectangular turbulent channel is modeled explicitly using two conservation laws: conservation of momentum and conservation of mass. The incompressible Navier-Stokes application mode in COMSOL 3.5a ...

Advanced simulation in medicine and biology: Opportunities for multiphysics modeling

S. Conrad
Louisiana State University, Health Sciences Center, Shreveport, LA, USA

Steven Conrad received his MD degree from Louisiana State University in 1978, and his PhD degree in Biomedical Engineering from Case Western Reserve University in 1985. His clinical practice includes intensive care and emergency medicine, and his research interests include computational dynamics and bioinformatics. He has worked with dynamic models of gas transport in artificial lungs, and more ...

Shear Induced Detachment Of Microorganisms Attached To A Plane Wall

B. Boulbène, J. Morchain, and P. Schmitz
Université de Toulouse, NSA, UPS, INP, LISBP, Toulouse, France

We present numerical results involving microorganisms adhering to a plane surface submitted to a shear flow. The purpose is to have a better understanding of the removal mechanisms occurring during the cleaning in place of food processing equipments. The biological cell, i.e. the microorganism, is modelled as a rigid obstacle embedded in the bottom wall of the fluid domain. Shear induced ...

FEM Based Modeling In COMSOL Multiphysics and Design Of Control Of Distributed Parameter Systems

C. Belavý, and G. Hulkó, and K. Ondrejkovic, and D. Šišmišová
Slovak University of Technology in Bratislava, Bratislava, Slovakia

This paper presents a finite element method based modeling and design of control for distributed parameter systems. First, models of distributed parameter systems in the form of lumped-input/distributed-output systems and structure of control loop are introduced. Next, modeling of temperature fields of the casting die as distributed parameter systems in preheating process is performed in COMSOL ...

The Effect of the Disintegration of Chemical Stratification on the Time-dependent Behavior of the Earth’s Mantle

A. Galsa, and M. Herein
Eötvös University
Budapest, Hungary

Based on recent results from seismology, geochemistry etc. the distinct chemical character of the D’’ layer (lowest part of the mantle around the Earth’s core) has appeared unequivocally. Numerical calculations have been carried out to investigate the effect of the disintegration, mixing and homogenization of the dense D’’ on the time-dependent behavior of mantle convection. A ...

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