Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Modeling Microwave Chiral Material Based On Crank Resonators Arrays Using COMSOL Multiphysics

J. Muñoz[1], G.J. Molina [1], M.M. Rojo[1]
[1]Dpto. Electromanetismo y Electrónica, Facultad de Química, Universidad de Murcia, Campus Espinardo, Murcia, Spain

Electromagnetic metamaterials present exotic and unusual properties hardly to be found in nature with many potential applications. They are usually built by distributing small resonant structures in periodical lattices. If the structure has chiral symmetry, the medium is called chiral metamaterial. Here the electrodynamics behavior of a chiral structure with a huge electromagnetic activity at ...

A High Power Planar Triode Oscillator Designed by Using FEM Modeling

S. Lefeuvre[1], M. Ghomi[2]
[1]EURL CREAWAVE, Labège, France
[2]CALCEM, Ste Foy d'Aigrefeuille, France

COMSOL, adding SPICE® elements into its FEM, gives the possibility of a direct modeling of oscillators: triode and load are FEM described while all the other components of the circuit are just simulated using SPICE®. The modeling is not a straight application of any module but needs the previous computation of the conductivity of the beam through the PDE interface. This paper is a bench mark ...

Dynamic Simulation of Electrochemical Etching of Silicon with COMSOL

A. Ivanov[1], U. Mescheder[1]
[1]Furtwangen University, Furtwangen, Germany

In the presented work the dynamic simulation of a silicon anodization process is performed. Two mechanisms of etch form development (diffusion in electrolyte, current flow) are considered and simulated. Influence of electrolyte conductivity and radius of the opening in the masking layer is discussed.

Simulation Organogenesis in COMSOL: Deforming and Interacting Domains

D. Iber[1], D. Menshykau[1]
[1]D-BSSE, ETH Zurich, Basel, Switzerland

Organogenesis is a tightly regulated process that has been studied experimentally for decades. We are developing mechanistic models for the morphogenesis of limbs, lungs, and kidneys with a view to integrate available knowledge and to better understand the underlying regulatory logic. Organ size changes dramatically during development, and tissues are composed of several layers that may expand ...

Thermoacoustic Analysis of Combustion Instability Importing RANS Data

G. Campa[1], E. Cosatto[2], S. Camporeale[1]
[1]Politecnico di Bari, Bari, Italy
[2]Ansaldo Energia, Genova, Italy

A hybrid technique based on the use of the FEM and the transfer matrix method is used to identify the frequencies at which thermoacoustic instabilities are expected and the growth rate of the pressure oscillations at the onset of instability. The Helmholtz equation is used to model the combustion chamber and the classical ?-? formulation for the flame model is adopted. The gas turbine combustion ...

Keyhole Formation During Spot Laser Welding: Heat and Fluid Flow Modeling in a 2D Axisymmetric Configuration

M. Courtois[1], M. Carin[2], P. LeMasson[2], S. Gaied [1]
[1]ArcelorMittal, Global R&D, Montataire, France
[2]LIMATB Laboratory, Université de Bretagne Sud, Lorient, France

For a better understanding of phenomena associated to the appearance of defects in laser welding, a heat and fluid flow model is developed. This study is focused on the modeling of a static laser shot on a sample of steel. This 2D axialsymmetric configuration is used to study phenomena related to the creation of the keyhole. This model takes into account the three phases of the matter: the ...

Coupled Electric-Thermal-Fluid Analysis of High Voltage Bushing

G. Eriksson[1]
[1]ABB, Corporate Research, Västerås, Sweden

Modern power transmission systems are in general designed to operate at high voltages in order to reduce resistive losses generated by high currents. This, however, tends to increase the risk for dielectric breakdown or flashovers if the equipment is not properly designed to withstand the stress. The present work illustrates how multiphysics simulations can be used to analyze and predict the ...

Multiphysics Modeling of Swelling Gels

A. Lucantonio[1], P. Nardinocchi[1], L. Teresi[2]
[1]Università degli Studi La Sapienza, Roma, Italy
[2]LaMS - Modelling & Simulation Lab, Università degli Studi Roma Tre, Roma, Italy

Polymer gels belong to the realm of soft active materials as they are capable of responding to a non-mechanical stimulus – the permeation of a solvent – with a mechanical action – a volume change, thanks to the coupling between different physics. This mechanism of coupling can be exploited in a wide range of applications, including biomedical devices, making crucial the understanding of the ...

Comparison Between Turbulent and Laminar Bubbly-Flow for Modeling H2/H2O Separation

E. Amores Vera[1], J. Rodríguez Ruiz[1]
[1]Centro Nacional del Hidrógeno, Puertollano, Spain

One of the most critical aspects on water electrolysis is gas-liquid separation, especially in systems with forced convection. The main problem of this kind of circulation is that a gas fraction could return to the electrolysis circuit. A suitable design of separator devices could be a solution in order to avoid a gas return to the electrolysis circuit. In this sense, the use of deflectors might ...

Investigation of Hydraulic Fracture Re-Orientation Effects in Tight Gas Reservoirs

B. Hagemann[1], J. Wegner[1], L. Ganzer[1]
[1]Clausthal University of Technology, Clausthal-Zellerfeld, Germany

In tight gas formations where the low matrix permeability prevents successful and economic production rates, hydraulic fracturing is required to produce a well at economic rates. As production from the well and its initial fracture declines, re-fracturing treatments are required to accelerate recovery. The orientation of the following hydraulic fracture depends on the actual stress-state of the ...