Castaings, M.1, Predoi, M.V.2, Hosten, B.1 1 Laboratoire Mécanique Physique, Univ. Bordeaux 1, UMR CNRS 5469, Talence, France
2 Catedra de Mecanica, Universitatea Politehnica Bucuresti, Bucuresti, Romania
Wave propagation in elastic waveguides is a problem of constant interest from the last decades. Several numerical approaches exist. The most intuitive uses time-marching routines that solve the equations of dynamic equilibrium and supply displacements of the structure nodes as time functions. This procedure is usually time and memory consuming due to huge number of temporal iterations required ...
Carin, M.1, Favre, E.2
1 Laboratoire d’Etudes Thermiques Energétique et Environnement, Université de Bretagne Sud, Lorient, France
2 Comsol France, Grenoble, France
A 2D axisymmetric model of a melt pool created by an arc type heat source has been developed using FEMLAB. The model solves the coupled equations of laminar fluid flow and heat transfer to demonstrate the flow behaviour in the pool. The coupled effects of buoyancy and capillary forces are taken into account. The presence of the liquid – solid interface is modelled by two different ways: a ...
Mao, L., Koser, H.
Department of Electrical Engineering, Yale University, New Haven, CT
We present a FEMLAB modeling study of an integrated, high-flow rate microfluidic pump for ferrofluids. Initial studies of these microfluidic devices have been performed using a onedimensional setup in MATLAB and later confirmed by corresponding simulations with FEMLAB 3.1 in partial differential equation (PDE) mode. It is determined that maximum flow velocity is achieved when the product of ...
Karpov, S., Krichtafovitch, I.
Kronos Air Technologies, Redmond, Washington
Electrohydrodynamic flow is a flow of electrically neutral gas caused by corona-generated charged particles (ions) drifting through it. The operation principles of electrostatic fluid accelerators that use corona discharge phenomenon can be described as following. High voltage applied between high curvature corona electrode and low curvature collecting electrode provides condition for ionization ...
Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY
At Rensselaer Polytechnic Institute we have altered our undergraduate and graduate curricula so that we now teach transport phenomena (heat, mass, momentum, charge) in a holistic manner rather than as discrete courses. The traditional pencil-papercalculator toolset was found lacking and so we turned to FEMLAB® as a teaching tool to help enhance student understanding. In this paper, I will ...
Bentz, D.N., Zhang, J., Bloomfield, M., Lu, J-Q., Gutmann, R.J., Cale, T.S.
Rensselaer Polytechnic Institute
One of the key issues in developing higher density microelectronics devices is the impact of the stresses induced by thermal expansion mismatches of the materials used. We have examined, using FEMLAB, the stresses due to interwafer copper interconnects embedded in multilayer structures created by bonding two wafers using an organic low-k dielectric glue, benzocylcobutene (BCB). This work ...
Dynamic adsorption with FEMLAB, modeling breakthrough curves of gaseous pollutants through activated carbon beds
Joly, A.1, Volpert, V.1, Perrard, A.2
1 Institut Camille Jordan (ICJ), CNRS UMR 5208, Mathématiques, Université Claude Bernard Lyon, Villeurbanne Cedex, France
2 Institut de Recherches sur la Catalyse, CNRS UPR 5401, Villeurbanne Cedex, France.
The purpose of this presentation is to expose how to apply FEMLAB to model the dynamic adsorption through adsorbent columns and to use the results of the numerical simulations to interpret the experiments. The mathematical formulation of the phenomena leads to a system of two partial differential equations (mass balance and adsorption rate), which can be solved in most cases only after ...
Numerical simulations of heat effects compared to measurements in III-V semiconductor saturable absorbers.
LePaul, S., Yang, N., Aniel, F.
Institut d’Electronique Fondamentale, Université Paris XI – CNRS UMR 8622, Orsay
The major purpose of this communication is to share our experiences on the numerical difficulties we ended up in simulating heating effects of saturable absorbers based on III-V semiconductors with the commercial finite element software FEMLAB 3.1. Saturable absorbers are devices devoted to full optical signal regeneration in optical telecom systems. The self heating effects in the structures ...
University of Applied Sciences Osnabrueck
With massive forming processes like rolling, extrusion and friction stir welding metal alloys are deformed in a hot solid state. Material flow under ideally plastic conditions can be modelled with computational fluid dynamics (CFD). This approach has advantages especially in case of large deformations. Material properties enter via a viscosity function, that can be related to the flow stress ...
Kaya, T., Koser, H.
This work focuses on the study of large amplitude, nonlinear deflection dynamics of a piezoelectric accelerometer and aims to determine the material and geometry limitations on the structural integrity of the device. FEMLAB’s multiphysics capabilities are used throughout this FEA study to understand the relationship of the geometry and materials to the resonance modes, large deflection ...