Application Gallery

La Bibliothèque de Modèles présente des modèles construits avec COMSOL Multiphysics pour la simulation d'une très grande variété d'applications, dans les domaines électrique, mécanique, fluidique et chimique. Vous pouvez télécharger ces modèles résolus avec leur documentation détaillée, notamment les instructions de construction pas à pas, et vous en servir comme point de départ de votre travail de simulation. Utilisez l'outil de recherche rapide pour trouver les modèles correspondant à votre domaine d'intérêt, et connectez vous avec votre compte COMSOL Access, associé à une licence COMSOL, afin de télécharger les fichiers modèles.

Inductive Heating of a Steel Billet

A squared billet made of steel is introduced into a coil operating at low frequency. The process is used in order to make the temperature in a section of the billet homogeneous, since it loses energy faster through the edges than through the lateral boundaries. It is shown here that heating at such a low frequency is not efficient for overheating the edges, although is is very efficient for ...

Capacitive Micromotor

This tutorial shows how to model a 2D capacitive micromotor. The motor consists of a rotor and a stator made of polysilicon. The cogs of the stator are subjected to a time-varying pulsed voltage such that the voltage on adjacent cogs vary by a phase difference of 2p/3. As a result, a time-varying torque acts on the rotor thereby rotating it about its center. This model shows how to use an ...

Nonlinear Magnetostrictive Actuator and Sensor

Magnetostrictive material exhibits free strain under the influence of magnetic field. It also exhibits a stress-induced change in magnetization in the presence of a bias magnetic field. In this tutorial we model a quasi-static transducer which has a steel housing enclosing a drive coil. A magnetostrictive material is placed in the core. Magnetic and structural interactions between the ...

Quadrupole Lens

Just like optical lenses focus light, electric and magnetic lenses can focus beams of charged particles. Systems of magnetic quadrupole lenses find a common use in focusing both ion and particle beams in accelerators at nuclear and particle physics centers. This model shows the path of ions going through three consecutive magnetic quadrupole lenses. The model also takes fringing fields ...

Electron Beam Diverging Due to Self Potential

When modeling the propagation of charged particle beams at high currents, the space charge force generated by the beam significantly affects the trajectories of the charged particles. Perturbations to these trajectories, in turn, affect the space charge distribution. The Charged Particle Tracing interface can use an iterative procedure to efficiently compute the strongly coupled particle ...

Cold Crucible

A cold crucible is used for the manufacturing of alloys that require a high degree of purity, like titanium alloys for the aeronautic industry. The cold crucible in this model is made of several water-cooled copper sectors that form the container in which the alloy is manufactured. The harmonic current flowing in the coils will induce a current in the crucible flowing in the opposite ...

Iron Sphere in a 60 Hz Magnetic Field

An iron sphere is exposed to a spatially uniform, sinusoidally time-varying, background magnetic field. The frequency of the field is low enough such that the skin depth is larger than the radius of the sphere. A reduced field formulation is used to impose the background field. Two approaches for solving this problem are shown. The induced currents in the sphere and the perturbation to the ...

A Geoelectrical Forward Problem

The classical forward problem of geoelectrics (includes electrical resistivity tomography, ERT and earlier techniques as vertical electric sounding, VES) is the calculation of potentials at a given set of electrodes (M,N) while current is injected at other electrodes (A,B) into the ground. Typically the physical domain (earth) is unbounded to the sides and the bottom because of which one needs ...

Capacitance in a Microstrip

To illustrate how to calculate lumped parameters of capacitance, this model calculates such in a microstrip. The example shows the two different ways of calculating this: with a static analysis and with a time-harmonic analysis.

Multipactor

Multipaction can occur when electrons are accelerated by a high frequency RF field into surfaces. Secondary electron emission can occur and under the right conditions there can be an exponential growth in the number of electrons. The multipaction effect is strongest at a specific RF frequency, which depends on the dimensions of the device and the applied voltage.\n\nThis model requires the ...

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