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Modeling an integrated, high flow rate MEMS ferrofluid pump

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 ...

Electrohydrodynamic flow modeling using FEMLAB

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 ...

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 ...

FEMLAB® as a teaching and discovery tool for transport phenomena

Plawsky, J.L.
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 ...

Modeling Thermal Stresses of Copper Interconnects in 3D IC Structures

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 ...

Modelling massive forming processes with thermally coupled fluid dynamics

Schmitter, E.D.
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 ...

A computational fluid dynamics model of a 20Kg induction stirred laboratory scaled ladle

Pal, M., Eriksson, R., Jönsson, P.
MSE, KTH-Stockholm

In this paper a computational fluid dynamics model of a 20 Kg laboratory scaled induction ladle is presented. This particular laboratory furnace can be equipped with an electromagnetic stirrer, which can be used to agitate the steel melt. The CFD model so developed will make it feasible to have information about the fluid flow in this particular laboratory furnace. The objective of this paper ...

Simulation of Faults by Means of Finite Element Analysis in a Switched Reluctance Motor

Briso-Montiano, J.R., Karrelmeyer, R., Dilger, E., Bosch, R.
Robert Bosch GmbH Stuttgart, Dept. CR/AEY

The influence of the presence of errors in the behavior of a switched reluctance motor is investigated in this paper. The dynamic response of a Switched Reluctance Motor (SRM) is analyzed by the coupled structural and electromagnetic Finite Element Method (FEM). The dynamic behavior of the motor under failure operation can lead us to non-invasive diagnosis of faults and rotor eccentricity in ...

Coupling FEMLAB and modeFRONTIER for Multiobjective Shape Optimization of Convective Wavy Channels

Pinto, F., Rizzetto, G., Nobile, E.
DINMA, Sezione di Fisica Tecnica, Università di Trieste, Trieste, ITALY

Convective wavy channels represent the building block of an ample variety of heat exchangers, and from an engineering point of view a desired target is to modify the shape of the channels in order to maximize their heat transfer rate, without an excessive penalty in their pressure losses. In this paper we describe how this has been achieved by coupling FEMLAB, a general purpose unstructured ...

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