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.

Bone Remodeling Following Total Hip Replacement: Short Stem Versus Long Stem Implants

M.S. Yeoman[1], A. Cizinauskas[1], C. Lowry[2], G. Vincent[3], S. Collins[3], D. Simpson[3]
[1]Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
[2]Corin Group, Cirencester, United Kingdom
[3]Imoprhics, Manchester, United Kingdom

Bone resorption around hip stems, in particular periprosthetic bone loss, is a common observation post-operatively. A number of factors influence the amount of bone loss over time and the mechanical environment following total hip replacement (THR) is important. Conventional long stem prostheses have been shown to transfer loads distally, resulting in bone loss of the proximal femur. More ...

Influência da Camada de Ar Sobre a Deformação de uma Embalagem de Líquido com Cartão Tipo LPB - new

I. Neitzel[1], K. B. Matos[1], L. R. Pesch[1]
[1]Faculdade de Telêmaco Borba - FATEB, Telêmaco Borba, Paraná, Brasil

As embalagens de produtos alimentícios são hoje em dia predominantemente feitas com cartão tipo LPB (Liquid Packaging Board) e usualmente estocadas de forma empilhada, tanto nas prateleiras como nos depósitos dos supermercados. O LPB é um compósito multicamadas de construção complexa, envolvendo, tipicamente, papel produzido com fibras virgens, polietileno e alumínio. O alimento líquido ao ser ...

Multiphysics Software Applications in Reverse Engineering

W. Wang[1], K. Genc[2]
[1]University of Massachusetts, Lowell, MA, USA
[2]Simpleware, Exeter, United Kingdom

During the past decade reverse engineering has become a common and acceptable practice utilized by many aftermarket suppliers, and even original equipment manufacturers (OEM). This presentation focuses on the applications of multiphysics software such as COMSOL and Simpleware® in reinventing the design details and manufacturing processes of an existing part in the absence of the original design ...

COMSOL Implementation of Valet-Fert Model for CPP GMR devices

T. Xu[1], C.K.A. Mewes[1], S. Gupta[2], and W.H. Butler[1]
[1]Department of Physics and Astronomy and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA
[2]Department of Metallurgical and Materials Engineering and Center for Materials for Information Technology, University of Alabama, Tuscaloosa, Alabama, USA

The Giant Magneto Resistance (GMR) effect is a quantum mechanical effect which can be observed in systems consisting of thin alternating ferromagnetic and non-ferromagnetic layers. Simulation using COMSOL allows the evaluation of the magneto-resistance ratio and the electrical resistances of realistic CPP-GMR devices and opens the possibility to study new device materials and designs.

Simulation of Pumping Induced Groundwater Flow in Unconfined Aquifer Using Arbitrary Lagrangian-Eulerian Method

Y. Jin[1], E. Holzbecher[1], S. Ebneth[2]
[1]Department of Applied Geology, Georg-August-University, Göttingen, Germany
[2]Hoelscher Dewatering, Haren, Germany

A novel numerical method characterizing groundwater flow in unconfined aquifer is demonstrated. In contrast to the conventional method (Dupuit approach considering horizontal flow only), hydraulic head is simulated in horizontal and vertical directions. The new approach is introduced via developing a 2-D-axisymmetric model representing the vertical cross section of the aquifer. The model solves ...

Heat, Air, and Moisture (HAM) Modeling of Historic Windows

H.L. Schellen[1]
[1]Eindhoven University Of Technology, Eindhoven, The Netherlands

Windows are the thermal weakest places in the external envelop of buildings. This is true for historic windows with original single pane glazing in historic buildings. To reduce the energy consumption and to improve thermal comfort of historic buildings, replacing these windows by modern double glazed windows affects the authentic character of these buildings too much. One way to improve the ...

Modeling the Collimator-Detector Scattering Using Stochastic Differential Equations and COMSOL

A. Jeremic[1], T. Farncombe[2], S. Liu[2], and Y. Abdul-Rehman[1]
[1]Department of Electrical and Computer Engineering, McMaster University, Hamilton, Ontario, Canada
[2]Department of Radiology, McMaster University, Hamilton, Ontario, Canada

Single photon emission computed tomography (SPECT) is a nuclear medicine imaging technique that uses gamma rays. It has been especially useful for bone scans, cardiac perfusion imaging, tumor scans and brain imaging. The main advantage of SPECT imaging is that it can target particular tissue receptors allowing one to focus on the imaging of the diseased tissue. In most cases Monte Carlo ...

COMSOL Multiphysics Models for Teaching Chemical Engineering Fundamentals: Absorption Column Models and Illustration of the Two-Film Theory of Mass Transfer

W. Clark
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA

COMSOL® models have been developed for teaching gas absorption fundamentals. Model results are compared to environmentally significant experimental results for removing CO2 and SO2 from air using water as solvent. For concentrated gas mixtures, the models are shown to be equivalent to but easier to use than the traditional graphical integration method and to a solution method developed with ...

Topology Optimization of Dielectric Metamaterials Based on the Level Set Method Using COMSOL Multiphysics

M. Otomori, and S. Nishiwaki
Kyoto University
Japan

This presentation shows a level set-based topology optimization method for the structural design of negative permeability dielectric metamaterials incorporating the level set boundary expression based on the concept of the phase field method, and its optimization algorithm implemented by COMSOL Multiphysics. Furthermore, several design examples are provided to confi rm the usefulness of the ...

Optimization of Micro-Structured Waveguides in Lithium Niobate (Z-Cut) - new

H. Karakuzu[1], M. Dubov[1], S. Boscolo[1]
[1] Aston University, Birmingham, UK

We present an optimization procedure to improve the propagation properties of the depressed-cladding, buried micro-structured waveguides formed in a z-cut lithium niobate (LN) crystal by high repetition rate femtosecond (fs) laser writing. It is shown that the propagation wavelength for which the confinement losses of ordinary (O) and extraordinary ordinary (E) polarizations are below 1 dB/cm ...