V. Antonucci, M. Esposito, R. Marzella, and M. Giordano
Institute for Composite and Biomedical Materials, CNR, Portici, NA, Italy
Imast, Portici, NA, Italy
A quasi static indentation test on a laminate composite has been investigated numerically and experimentally. In particular, the test has been implemented by COMSOL Multiphysics® and optimizing the Finite Element and mesh. In addition, the numerical strain results have been validated by the comparison with the respective experimental deformation data that have been obtained by fiber Bragg ...
M. Cavenago, P. Veltri, E. Gazza, G. Serianni, and P. Agostinetti
INFN-LNL, Legnaro, Padova, Italy
Consorzio RFX, Padova, Italy
The development of powerful negative ion sources requires precise and versatile simulation tools to predict the emittance of the extracted ion beams and the heat load on the electrodes. A first tool is a determination of the plasma beam interface which is accomplished by a set of macro based in the COMSOL Multiphysics environment. Notwithstanding the strong nonlinearities involved, a proper ...
TM Wave Propagation in Optical Nanostructures with a Third-Order Nonlinear Response: Modeling and Validation with COMSOL
A. Kildishev, E. E. Narimanov
Birck Nanotechnology Center, School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana, USA
An enhanced method is used for analysis of third-order nonlinearities in optical nanostructures with scalar TM (H-field) frequency domain formulation. After embedding it in COMSOL Multiphysics it is shown to produce fast and accurate results without superfluous vector E-field formalism. A standard TM representation based on cubic non-linear susceptibility χ(3) results in an intractable ...
J. Bouhattate, E. Legrand, A. Oudriss, S. Frappart, J. Creus, and X. Feaugas
Laboratoire d’Etude des Matériaux en Milieu Agressif, LEMMA, Bat. Marie Curie, La Rochelle, France
To understand a metal susceptibility to Hydrogen Embrittlement (HE), it is important to quantify the diffusion of hydrogen through a metallic membrane. Electrochemical permeation tests are the most common methods for experimentally determining the diffusion coefficient of a metal. However the parameters directly accessible from experiments are the time required for a stream to be observed and ...
G. Jehle, D. Kern, and W. Seemann
Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
This paper proposes the design of a 3-Degree of Freedom(DoF) motor based on surface acoustic waves in elastic solids. The rotor is propelled by wave fields, for linear and rotational motion respectively, in the stator, that can be steered by the driving signal of the piezoelectric actuators, which are placed on an elastic plate. The next considerations concern the feasibility of the proposed ...
Modeling Thickness Shear Mode Quartz Sensors for Increased Downhole Pressure & Temperature Applications
G.R. Kirikera, W. Patton, and S.M. Behr
Geophysical Research Company LLC, Tulsa, OK, USA
Numerous sensors based on various sensing principles are used to measure pressures and temperatures in wellbores. Of all these sensors, piezoelectric quartz is the most preferred means of sensing pressure and temperature and is probably the only sensor to meet stringent downhole measurement requirements. The sensor consists of a quartz piezoelectric resonator hermetically sealed between two ...
M.K. Gobbert, and D.W. Trott
University of Maryland, Baltimore, MD, USA
We will show how to carry out convergence studies of the FEM error on a sequence of progressively finer meshes in COMSOL Multiphysics on the example of Lagrange elements of varying polynomial degrees, which will also bring out the benefit of using higher order elements. The sample studies will focus on Lagrange elements of degree 1 through 5. For these elements, the convergence order of the ...
COMSOL\'s new CFD Module has been tested for laminar and turbulent flows in simple geometries, with couple or segregated solver. These tests allow mesh sensitivities and comparison with analytical solutions. They also give a first idea of cpu time and RAM use for standard cases. In a second part a thermal-fluid simulation of a real industrial application is done: the air flows cooling a large ...
J. Park, T.I. Bjørnarå, and B.A. Farrelly 
Norwegian Geotechnical Institute(NGI), Oslo, Norway
MultiField Geophysics AS, Norway
In the study, we present an efficient absorbing boundary domain technique whose main application is the 3D finite element (FE) modelling of the so-called controlled-source electromagnetic (CSEM) data, collected for the geophysical exploration. The developed technique is based on the real-value exponentially-stretched coordinates. We have implemented the developed technique using the user ...
S. Mitra, R. Naik, and A. Narain
Michigan Technological University, Houghton, MI, USA
The paper outlines a two-dimensional computational methodology and presents results for laminar/laminar condensing flows inside mm- scale ducts. The methodology has been developed using MATLAB/COMSOL platform and is currently capable of simulating film-wise condensation for steady and unsteady flows. The results obtained are shown to be in agreement with an independently developed quasi-one ...