This work is concerned with the study of the asymmetrical phenomenon observed in three-phase transformers during the standard short-circuit test. The purpose of our work is to see if the asymmetric measurements can be predicted with the... COMSOL Conference 2009, Boston R. Escarela-Perez1 , E.A. Gutierrez-Rodriguez2 , J.C. Olivares-Galvan1 , M.S. Esparza-González, and E. Campero-Littlewood1 1 Departamento de Energia, Universidad Autonoma Metropolitana - Azcapotzalco, Mexico D.F., Mexico 2 Instituto Tecnologico de Aguscalientes, Aguascalientes, Mexico
A kernel of grain is modeled as an isothermal sphere, with descriptive differential equations scaled or rendered into non-dimensional form, where moisture transfer is governed by internal diffusivity, not by surface conditions. The time... COMSOL Conference 2009, Boston K. Lund1 1 Kurt Lund Consulting, Del Mar, California, USA
Polymer electrolyte membrane (PEM) fuel cells have attracted attention as an alternative power source in various applications such as vehicles, portable supplies, and stationary power systems. A non-isothermal PEM fuel model is developed... COMSOL Conference 2009, Boston H. Shin1 1 Department of Mechanical Engineering, University of Michigan – Ann Arbor, Michigan, USA
Large deflection actuators are becoming increasingly important for microsystems. Since actuation forces are usually small, large deflection actuators usually require flexures with low stiffness. Rectangular serpentine flexures are often... COMSOL Conference 2009, Boston Minhee Jun1 , and Jason V. Clark1 1 Departments of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, USA
The bearing and shaft are part of a safe and arm device constructed as an assembly by a multi-layer additive/subtractive plating and planarization processes (EFAB technology). Devices are constructed by a multi-layer additive/subtractive... COMSOL Conference 2009, Boston E. Gutierrez-Miravete1 , and J. Streeter2 1 Department of Engineering and Science, Rensselaer at Hartford, Hartford, Connecticut, USA 2 Optiwind, Torrington, Connecticut, USA
The goal of this study was to determine the possibility of using the finite element in COMSOL Multiphysics program to obtain a high accuracy solution to a moving boundary problem, specifically, the solidification of copper. A... COMSOL Conference 2009, Boston J. Michalski1 , and E. Gutirrez-Miravete2 1 Hamilton-Sundstrand 2 Rensselaer at Hartford, Hartford, Connecticut, US
This paper report on a study of the hydrodynamics of skimboards and surfboards using the computational fluid dynamics (CFD) module in COMSOL. The study analyzes the flow in a thin water layer underneath a skim board in a 2-D Cartesian... COMSOL Conference 2009, Boston N.D. Barnett1 , and E. Gutirrez-Miravete2 1 General Dynamics-Electric Boat, Kingston, Rhode Island, USA 2 Rensselaer at Hartford, Hartford, Connecticut, USA
The use of Microwave/RF energy on cancer cells is explored for tumor ablation using medium power level ranging between a few Watts to about 50 Watts. In this research, low power levels, less than 100 mWatt, are used to evaluate the... COMSOL Conference 2009, Boston A. Dulipovici1 , D. Roman2 , I. Stiharu2 , and V. Nerguizian1 1 École de technologie supérieure, Montreal, Quebec, Canada 2 Concordia University, Montreal, Quebec, Canada
Superparamagnetic micro beads offer some attractive applications in biological and biomedical fields. Some of the important applications include manipulation and separation of cells, isolation of specific cells, active drug... COMSOL Conference 2009, Boston U. Veeramachaneni1 , and R.L. Carroll1 1 Department of Chemistry, West Virginia University, Morgantown, West Virginia, USA
Aging infrastructure requires frequent inspections to assess their structural integrity. However, the large amount of existing infrastructure, and the distance between these structures present significant challenges to inspectors.... COMSOL Conference 2009, Boston K. Koppenhoefer1 , S.Yushanov1 , and M.H. McKenna2 1 AltaSim Technologies, LLC, Columbus, Ohio, USA 2 U.S. Army Engineering Research and Development Center
This paper presents the solution of a transient electromagnetic problem using COMSOL Multiphysics. The paper also presents a closed-form solution of a transient electromagnetic dipole. The computational solution compares well with a... COMSOL Conference 2009, Boston J.C. Crompton1 , K.C. Koppenhoefer1 , and S.Y. Yushanov1 1 AltaSim Technologies, LLC, Columbus, Ohio, USA
A comparison of the commercial code COMSOL is performed with the bench-mark solutions provided by the literature for a tall, differentially heated rectangular cavity for aspect ratios of 8, 15, 20, and 33. At small Rayleigh numbers the... COMSOL Conference 2009, Boston H. Dillon1 1 Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA
Using COMSOL 3.5a, a set of benchmark problems requiring the use of the COMSOL Computational Fluid Dynamics (CFD) module has been simulated. Several of the problems include fluid-heat transfer interactions (Computational Heat Transfer -... COMSOL Conference 2009, Boston Darrell Pepper Professor of Mechanical Engineering, University of Nevada - Las Vegas
Atherosclerosis causes the deposition of plaque on the inner walls of arteries, which leads to restricted blood flow. Using the balloon angioplasty procedure, stents can be inserted and expanded in the atherosclerotic artery. We used... COMSOL Conference 2009, Boston H.C. Wong1 , K.N. Cho1 , and W.C. Tang1 1 Department of Biomedical Engineering, University of California, Irvine, California, USA
In modeling of thermal processing of biological materials with rapid evaporation, it is critical to provide boundary conditions consistent with the phenomena happening at the surface to accurately predict spatial temperature and moisture... COMSOL Conference 2009, Boston A. Datta1 , and A. Halder1 1 Biological and Environmental Engineering, Cornell University, Ithaca, New York, USA
This paper describes a type of didactic material used when teaching electromagnetism. The purpose is to guide the students to verify the results of a Finite Element (FE) simulation using those obtained analytically. This procedure has... COMSOL Conference 2009, Boston J.C. Olivares-Galvan1 , I. Hernandez2 , P.S. Georgilakis3 , and L.E. Campero1 1 Universidad Autónoma Metropolitana, Azcapotzalco, Mexico, D.F. 2 Centro de Investigacion y de Estudios Avanzados del IPN, Unidad Guadalajara, Guadalajara, Jalisco, Mexico 3 School of Electrical and Computer Engineering, National Technical University of Athens, Athens, Greece
The collection efficiency of aerosol particles on a ribbon in a turbulent flow is analyzed using COMSOL Multiphysics. The flow field is solved using Chemical Engineering module and particle tracing plots are obtained using equations of... COMSOL Conference 2009, Boston R. Divigalpitiya1 1 3M Canada Company, London, Ontario, Canada
Magnetorheological Elastomers (MREs) are a composite that consist of magnetic micrometer sized particles suspended within rubber matrix filler. By placing this material within an external magnetic field during the rubber curing process,... COMSOL Conference 2009, Boston J. Biggs1 , P. VonLockette1 , and S. Lofland1 1 Rowan University, Glassboro, New Jersey
Cooling of high-power density electronic devices remains a challenge. Microfluidic heat-pipes with the potential of achieving ultra-high thermal conductivities offer a low-cost technology for cooling electronics. To achieve high thermal... COMSOL Conference 2009, Boston N. Srivastava1 , and C.D. Meinhart1 1 Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara California, 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... COMSOL Conference 2009, Boston T. Xu1 , C.K.A. Mewes1 , S. Gupta2 , and W.H. Butler1 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
