S.L. Firebaugh, E.A. Leckie, J.A. Piepmeier, and J.A. Burkhardt
United States Naval Academy, Annapolis, Maryland, USA
Microrobotics has promising applications in microsurgery and microassembly. A challenge in these systems is interfacing with the robot. This project explores crawling robots that are powered and controlled through a global mechanical vibration field. By controlling the frequencies present in the vibration field, the user can then steer the robot. The “robot” has a rectangular body with ...
Modeling of Transport Phenomena during Hydrogen Uptake in an Alanate Storage System Equipped With Metallic Honeycomb Heat Exchanger
M. Bhouri, J. Goyette, B.J. Hardy, and D.L. Anton
Hydrogen Research Institute, Université du Québec à Trois-Rivières, Trois-Rivières, QC, Canada
Savannah River National Laboratory, Aiken, SC, USA
In this paper, a metallic honeycomb structure is used as a heat exchanger in order to improve the hydrogen refuelling time for an alanate storage system. Using COMSOL software, the heat exchanger structure and the hydride bed are modeled as a two separate media and the governing equations describing the physics phenomena occurring during the loading process, are solved. The simulation results ...
Multiphysics Modeling of Cellular Arrays Using Periodic Minimal Surfaces – A Drug and Gene Delivery Application
J.I. Rey, A.J. Llewellyn, R.J. Connolly, J.P. Jimenez, A.M. Hoff, and R.A. Gilbert
University of South Florida, Tampa, FL, USA
Minimal surfaces are found in nature from crystalline structures to biological nano and micro structures such as biomembranes, and osseous formations in sea urchin. An application to electrically mediated drug and gene delivery is presented. Periodic level surfaces which approximate minimal surfaces are used to generate a geometric representation of tissue. A method to create such structures ...
A. Alfauwaz, and K. Sun
Stanford University, Stanford, CA, USA
Precise physics experiments in space require highly stable thermal environments, especially if the experiments are targeted in earth orbits where eclipses will cast large temperature variation. We have been designing and modeling a thermal system with sub micro-kelvin stability using COMSOL. Our design is comprised of multiple alternative layers of conductive materials and vacuum isolations, ...
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 ...
CEA Valduc, France
During the welding of tantalum with a ND: YAG pulsed laser, a deep and narrow cavity, called the keyhole, is formed. At the end of the process, surface tension forces provoke the collapse of the keyhole. For important interface deformations, gas bubbles can be trapped into the melting pool. If the solidification time is insufficient, these bubbles give birth to residual porosities. The aim of the ...
Two-Dimensional FEM Analysis Of Brillouin Gain Spectra In Acoustic Guiding And Acoustic Antiguiding Single Mode Optical Fibers
Y.S. Mamdem, X. Pheron, F.Taillade, Y. Jaouën, R. Gabet, V. Lanticq[1,3], G. Moreau, A. Boukenter, Y. Ouerdane, S. Lesoille, and J. Bertrand
EDF R&D, Chatou, France
ANDRA, Chatenay-Malabry, France
LCPC, Paris, France
Telecom ParisTech, Paris, France
Laboratoire Hubert Curien, Saint-Etienne, France
We present a full modal -analysis of optical and acoustic properties based on two-dimensional finite-element method (2D-FEM) for Brillouin Gain spectrum (BGS) determination in optical fibers with COMSOL. This model enables us to predict precisely the BGS of any kind of silica fiber knowing well the geometry of doping composition. The results of numerical modeling have shown good agreement in ...
Homogeneous and Inhomogeneous Model for Flow and Heat Transfer in Porous Materials as High Temperature Solar Air Receivers
O. Smirnova, T. Fend, P. Schwaryboezl, and D. Schoellgen
German Aerospace Center, Institute of Technical Thermodynamics, Koeln, Germany
Results of simulations on flow and heat transfer in a porous Silicon Carbide honeycomb structure applied as a solar air receiver are presented. In this application porous materials are put in concentrated solar radiation. Flux densities of up to 1000 MW/m² are reached. Simultanously, ambient air flows through the material to be heated up to temperatures of app. 800°C. This hot air is then used ...
L. Martinelli, A. Spiandorello, P. Ruol, and A. Lamberti
DICAM, Università di Bologna, Italy
Civil Engineer, Italy
IMAGE, Università di Padova, Italy
This paper will present a numerical model based on COMSOL Multiphysics suited to simulate the dynamic response of a catenary mooring (or a submarine cable). In general, mooring lines are subject to a direct wave load (e.g. drag, inertia) in addition to the movement of the vessel to which they are linked. Tests were carried out at the wave flume of the Maritime Laboratory of IMAGE Department, ...
R. Kroczek, and J. Domin
Silesian University of Technology, Gliwice, Poland
This paper describes consecutive stages of design and construction of electromagnetic gun manufactured at the Silesian University of Technology. It gives insight into current knowledge about such a launcher. The computer model was elaborated in COMSOL Multiphysics version 3.5. The numerical analysis was carried out a 3-dimensional space. The physical model was build up and comparison of the ...