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Suchbegriff:

How Finite Element Analysis Revolutionized a 100-Year Old Equation

K. Carlson [1], J. Arle [1], J. L. Shils [2], L. Mei [1],
[1] Beth Israel Deaconess Medical Center/Harvard Medical School, Boston, MA, USA
[2] Rush Medical Center, Chicago, IL, USA

In 1901 Weiss proposed an equation predicting activation of nerve fibers by electrical stimulation, used in neuroscience and neuromodulation, which applies electric fields to modify nerve behavior in neurological disorders. Weiss’ equation is relative to geometry, electrode array, ... Mehr lesen

Simulating Thermotherapeutic Response Induced by Thermal Padding for Treating Acute Injuries

J. Kantor[1], Y. Feng[1], C. Acosta[1], E. Massingill[1]
[1]University of Texas at San Antonio, San Antonio, TX, USA

Cryotherapy and thermotherapy are common methods of treatment for acute injuries ranging from ankle sprains to complex surgery. The idea behind such treatment is that a change in temperature will reduce pain and constrict fluctuations in blood flow at the targeted area. The purpose of ... Mehr lesen

An Acoustical Finite Element Model of Perforated Elements

P. Bonfiglio[1][2] and F. Pompoli[1][2]
[1]Materiacustica S.r.l., Ferrara, Italy
[2]Engineering Department, University of Ferrara, Ferrara, Italy

The present work deals with a numerical investigation of resonating systems used for noise control applications. In literature one can find analytical models based on fluiddynamics concepts for evaluating losses occurring across the holes of the perforates. In the paper an acoustical ... Mehr lesen

Modeling and Design of Material Inkjet Printer Ultraviolet LED Curing Cartridges Using COMSOL Multiphysics® for Printed Electronics Applications

M. Guvench[1], R. Wiswell[1]
[1]University of Southern Maine, Gorham, ME, USA

COMSOL Multiphysics® coupled with Solidworks® is employed to design, simulate and fabricate cartridges for a materials printer to accomplish in-situ curing of UV curable ink patterns as they are printed on flexible media for printed electronic circuit manufacturing. The cartridges ... Mehr lesen

Finite Element Analysis of Temperature and Viscosity Effects on Resonances in Thin-Film Bulk Acoustic Wave Resonators

G. Rughoobur[1], M. DeMiguel-Ramos[2], L. García-Gancedo[1], M. Clement[2], J. Olivares[2], T. Mirea[2], W. I. Milne[1], E. Iborra[2], A. J. Flewitt[1]
[1]University of Cambridge, Cambridge, UK
[2]Universidad Politécnica de Madrid, Madrid, Spain

The shear mode of film bulk acoustic resonators (FBARs) is preferred to the longitudinal mode owing to its lower acoustic losses in a liquid. However in addition to mass loading, the resonance is also affected by temperature and liquid viscosity. These two parameters can either be sensed ... Mehr lesen

Optimization of the Design of a GEM Tracker Based on Gas Flow Simulations with COMSOL

V. De Smet[1], V. Bellini[2], E. Cisbani[3], F. Noto[2], F. Mammoliti[2], C. M. Sutera[4], and M. Mangiameli[4]
[1]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; Haute Ecole Paul-Henri Spaak, ISIB, Bruxelles, Belgium
[2]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; INFN – Sezione di Catania, Catania, Italy
[3]INFN – Sezione di Roma - Sanità Group, Roma, Italy; Italian National Institute of Health, Roma, Italy
[4]INFN - Sezione di Catania, Catania, Italy

A Computational Fluid Dynamics study has been performed for a Gas Electron Multiplier (GEM) detector of high energy charged particles, currently under development as part of a new tracker of the high luminosity spectrometers in Hall A at Jefferson Lab. By gradual modifications of the ... Mehr lesen

Thermo-Mechanical Analysis of Composite Material Exposed to Fire

A. Davidy[1]
[1]IMI, Ramat Hasharon, Israel

This paper presents thermo-mechanical models for predicting the strength of polymer laminates loaded in tension or compression exposed to one-sided radiant heating by fire. The first part is the fire simulation where the FDS model is utilized. The FDS model generates a solution of ... Mehr lesen

Multiscale Electromagnetic Modeling of Contractions in the Pregnant Uterus

V. Tidwell[1], P. LaRosa[2], M. Zhang[1], H. Eswaran[3], A. Nehorai[1]
[1]Department of Electrical & Systems Engineering, Washington University in St. Louis, St. Louis, MO, USA
[2]Monsanto Company, Technology Pipeline Solutions, St. Louis, MO, USA
[3]OB/GYN Department, University of Arkansas for Medical Sciences, Little Rock, AR, USA

Uterine contractions during pregnancy are currently poorly understood – experts disagree on the mechanisms by which contractions propagate through the organ and the structural layout of the uterine muscle fibers. We have developed a multi-scale model of the uterus, at the cellular, ... Mehr lesen

In Silico Evaluation of Local Hemodynamics Following Vena Cava Filter Deployment

J. Ferdous[1], M. Ghaly [2], V. B. Kolachalama [3], T. Shazly[1,4]
[1]Biomedical Engineering Program, University of South Carolina, Columbia, SC, USA
[2]Department of Biomedical Engineering, North Carolina State University, Raleigh, NC, USA
[3]Charles Stark Draper Laboratory, Cambridge, MA, USA
[4]Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA

Inferior vena cava (IVC) filters have become essential components in deep vein thrombosis treatment to prevent preventing pulmonary embolisms. Filter efficacy relies on maintaining IVC patency by preventing filter-induced thrombosis following clot capture. A computational model has been ... Mehr lesen

The Friction Coefficient of Fractal Aggregates in the Continuum and the Transition Regimes

A. Melas[1][3], A.G. Konstandopoulos[1], L. Isella[2], Y. Drossinos[1]
[1]Department of Chemical Engineering, Aristotle University, Thessaloniki, Greece
[2]European Commission, DG Energy, Luxemburg
[3]European Commission, Joint Research Centre, Ispra, Italy

Aerosol and colloid aggregates are complex fractal-like structures composed of primary spheres. The drag force exerted on a fractal-like object is usually determined by solving numerically the Stokes equation. In this study we calculate it by relating it to a molecule-aggregate collision ... Mehr lesen

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