Galeria de Modelos

A Galeria de Modelos possui arquivos do COMSOL Multiphysics de várias áreas de aplicação incluindo elétrica, mecânica, escoamento e química. Você pode baixar modelos prontos e também tutoriais passo-a-passo para montar seu modelo, e usá-lo como ponto de partida para o seu próprio modelo. Use a função de busca "Quick Search" para encontrar modelos na sua área de interesse e faça o login ou o seu cadastro no COMSOL Access, cadastrando a sua licença do COMSOL, para poder baixar os arquivos.

Modeling of an RF Coil

RF coils are important in numerous applications ranging from wireless technology to MRI scanning equipment. This introductory tutorial model demonstrates how to find the fundamental resonance frequency of an RF coil as well as how to perform a frequency sweep to extract the coil's Q-factor.

Impedance Matching of a Lossy Ferrite 3-port Circulator

A lossy ferrite circulator at 3GHz is modeled. Geometrical design parameters are varied to match the impedance for minimal reflection of the fundamental TE10 rectangular waveguide mode.

Ship Hull Corrosion Mitigation

Impressed current cathodic protection is a commonly employed strategy to mitigate the ship hull corrosion where an external current is applied to the hull surface, polarizing it to a lower potential. In this model, the effect of propeller coating on the current demand is demonstrated.

Absorbed Radiation (SAR) in the Human Brain

Scientists use the SAR (specific absorption rate) to determine the amount of radiation that human tissue absorbs. This measurement is especially important for mobile telephones, which radiate close to the brain. The model studies how a human head absorbs a radiated wave from an antenna and the temperature increase that the absorbed radiation causes. The increasing use of wireless equipment has ...

Phase Change

This example demonstrates how to model a phase change and predict its impact on a heat transfer analysis. When a material changes phase, for instance from solid to liquid, energy is added to the solid. Instead of creating a temperature rise, the energy alters the material’s molecular structure. Equations for the latent heat of phase changes appear in many texts but their implementation is ...

Electrostatically Actuated Cantilever

The elastic cantilever beam is one of the elementary structures used in MEMS designs. This model shows the bending of a cantilever beam under an applied electrostatic load. The model solves the deformation of the beam under an applied voltage.

Flow in a Pipe Elbow

Water flow in a 90 degree pipe elbow. The flow is simulated using the k-omega turbulence model. The result is compared to engineering correlations.

Computing Q-Factors and Resonant Frequencies of Cavity Resonators

A classic benchmark example in computational electromagnetics is to find the resonant frequency and Q-factor of a cavity with lossy walls. Here, models of rectangular, cylindrical, and spherical cavities are shown to be in agreement with analytic solutions.

Computing Capacitance in a Comb Drive

Capacitive comb drives are commonly used both as actuators and position sensors. The following model focuses on position measurement. Many approaches exist for positional measurements with MEMS devices, of which capacitance measurement is the most widely used, particularly in micro-accelerometers. In a pair of interdigitated combs the fingers of one comb do not touch those of the other comb, ...

Magnetic Field of a Helmholtz Coil

A Helmholtz coil is a parallel pair of identical circular coils spaced one radius apart and wound so that the current flows through both coils in the same direction. This winding results in a uniform magnetic field between the coils with the primary component parallel to the axes of the two coils. Applications of Helmholtz coils range from canceling the earth’s magnetic field to generating ...

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