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The Application Gallery features COMSOL Multiphysics tutorial and demo app files pertinent to the electrical, mechanical, fluid, and chemical disciplines. You can download ready-to-use tutorial models and demo apps with step-by-step instructions for how to create them yourself. The examples in the gallery serve as a great starting point for your own simulation work.
Use the Quick Search to find tutorials and apps relevant to your area of expertise. Log in or create a COMSOL Access account that is associated with a valid COMSOL license to download the MPH-files.

Beam Subjected to Traveling Load

This application simulates the transient response of a beam that is placed on several equidistant supports and is subjected to a traveling load. The purpose of the application is to analyze the response of the bridge when vehicles pass over the same. It is observed that for a bridge with given geometric and material properties, certain vehicular speeds cause resonance in the bridge and it ...

Linear Wave Retarder

Combinations of optical devices such as polarizers and wave retarders can be used to control the intensity and polarization of transmitted radiation. In this model, two linear polarizers with orthogonal transmission axes are used to reduce the intensity of a ray to zero. Then the intensity and polarization of the transmitted ray are analyzed when a quarter-wave or half-wave retarder is placed ...

Fast Numerical Modeling of a Conical Horn Lens Antenna

An axisymmetric 3D structure such as a conical horn antenna can be simulated in a fast and efficient way using only its 2D layout. In this model, the antenna radiation and matching characteristics are computed very quickly with respect to the dominant TE mode from the given circular waveguide by simulating the 2D axisymmetric geometry of an 3D antenna structure.

1D Isothermal Lithium-Air Battery

Rechargeable lithium-air batteries have recently attracted great interest mainly due to their high energy density. The theoretical value is about 11400 Wh/kg which is around 10 times greater than the lithium-ion batteries. In this tutorial, discharge of a lithium-air battery is simulated using the *Lithium-ion Battery* interface. The transport of oxygen (from external air) in the porous carbon ...

Electrical Heating in a Busbar

This tutorial model of the Joule heating effect in a busbar demonstrates how to synchronize an assembly between Inventor and COMSOL, how to modify the geometry from COMSOL, and how to run a geometric parametric sweep.

1D Isothermal Nickel-Metal Hydride Battery

This model simulates the discharge of a Nickel-Metal Hydride (NiMH) battery using the Battery with Binary Electrolyte interface. The geometry is in one dimension and the model is isothermal. The model serves as an introduction to NiMH modeling, and can be further extended to include various side reactions.

Capacitively Coupled Plasma

This application provides insight into the instantaneous and periodic steady state solutions of a 1D capacitively coupled plasma. The geometry, pressure and applied voltage are all inputs, as is the frequency and number of RF cycles over which to solve. Aside from instantaneous and time averaged plots, global quantities for the power deposition and current are computed.

Magnetic Stiffness of an Axial Magnetic Bearing in 3D

The model illustrate the technique to calculate the magnetic stiffness in a 3D geometry of a permanent magnet axial magnetic bearing. The *Magnetic Fields* physics is used to model the bearing and compute the magnetic forces. The *Deformed Geometry* and *Sensitivity* physics are used to compute the magnetic stiffness.

Four-Bar Mechanism with Assembly Defect

This is a benchmark model for flexible multibody dynamics. This model simulates the dynamic behavior of a planar four-bar mechanism when one of the joints has a defect. The out-of-plane motion in the mechanism, caused by the defect in the joint, is compared with the results from the reference.

Gravitational Lensing

This model demonstrates how the sun causes 1.75 arcseconds of deflection for rays grazing the sun's surface as observed from the earth. Einstein predicted this value after refining his theory of relativity during World War I.