Flores, N., Gamio, J.C., Ortiz-Alemán, C., Damián, E.
Instituto Mexicano del Petróleo, México, D.F., México
Multiphase flow characterization is an important task for monitoring, measuring or controlling industrial processes. This can be done by means of process tomography. One category of process tomography, is electrical capacitance tomography (ECT), where the cross section to be imaged is surrounded by a set of capacitance electrodes formed from simple metal plates. This paper presents the ...
Charles Stark Draper Laboratory
Micromechanical resonators are used in a wide variety of applications, including inertial sensing, chemical and biological sensing, acoustic sensing, and microwave transceivers. Despite the distinct design requirements for each of these applications, a ubiquitous resonator performance parameter emerges. This is the resonator’s Quality factor (Q), which describes the mechanical energy damping. ...
Confinement Loss Computations in Photonic Crystal Fibres using a Novel Perfectly Matched Layer Design
Viale, P., Février, S., Gérôme, F., Vilard, H.
IRCOM, CNRS UMR 6615, Limoges, France
To modelize infinite photonic crystal fibre (PCF) with 2D-finite-geometry mode solver, it is necessary to use a perfectly matched layer (PML). We have performed a new type of PML design to simulate propagation in PCFs. The results obtained with index-guiding PCFs are in very good agreement with previous theoretical published results. Our PML is quickly optimized. The link between MATLAB and ...
Mattarolo, G., Bard, J.
ISET, Institut für Solare Energieversorgungstechnik, Kassel
Thermophotovoltaic (TPV) is an emerging technology based on the direct conversion of thermal radiation coming from a heat source into electricity by using photovoltaic (PV) cells. The first target for the TPV research is to break the threshold of 10% of efficiency, which would allow to start the commercialization of such technology in different applications. Defining and simulating a ...
Haschke, T.1, Lautenschlager, D.1, Wiechert, W.1, Bonaccurso, E.2, Butt, H.J.2
1 University of Siegen, Faculty 11, Department of Simulation, Siegen, Germany
2 Max-Planck-Institute for Polymer Research, Polymer Physics Group, Mainz, Germany
The design of micro and nanoscale systems is a great challenge for modelling and simulation. In particular Lab-on-a-Chip-technology offers a wide spectrum of possible applications. Recently Bonaccurso and Butt (Bonaccurso & Butt 2005) presented a new approach to investigate droplet evaporation: They placed water droplets on rectangular, silicon atomic force microscope (AFM) cantilevers so that ...
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 ...
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 ...
Numerical modeling of coupled heat and mass transport during frying and cooling of wood in contact with oil
Grenier, D.1, 2, Bohuon, P.1, 3, Baillière, H.1, Ben Lalli, A., Méot, J.M.1
1 CIRAD, Montpellier cedex, France
2 CTBA, Bordeaux cedex, France
3 ENSIA, 1101, Montpellier cedex, France
This paper proposes a model of coupled heat and mass (water, oil) transport in a porous medium (timber) soaked first in a hot oil bath, then in a cold oil bath. The timber is soaked at hot temperature to dry it (water vaporization, resulting in increased pressure and therefore vapor transport) and at cold temperature to treat it (vapor condensation, resulting in decreased pressure and oil ...
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 ...
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 ...