# Application Gallery

The Application Gallery features COMSOL Multiphysics® tutorial and demo app files pertinent to the electrical, structural, acoustics, fluid, heat, and chemical disciplines. You can use these examples as a starting point for your own simulation work by downloading the tutorial model or demo app file and its accompanying instructions.

Search for tutorials and apps relevant to your area of expertise via the Quick Search feature. To download the MPH-files, log in or create a COMSOL Access account that is associated with a valid COMSOL license. Note that many of the examples featured here can also be accessed via the Application Libraries that are built into the COMSOL Multiphysics® software and available from the File menu.

### Truss Tower Buckling

Buckling analysis is the search for the critical compressive load beyond which structures become unstable. The Truss Tower Buckling analysis application simulates the buckling of a truss tower under vertical compressive loads to provide the critical compressive load. With the app, you ... Read More

### Rössler Attractor

A Rossler attractor is a system of three non-linear, ordinary differential equations. The Rossler attractor is similar in nature to the Lorenz attractor. The non-linear equations can be solved in COMSOL by conveniently using the Massless formulation available in the Mathematical Particle ... Read More

### Optimization of a Crane Link Mechanism

In complex mechanical systems, it can be challenging to find an optimal (or even good enough) solution only through engineering insight or trial-and-error procedures. Using mathematical optimization methods can then be an efficient path to a better design. In this example, a link ... Read More

### 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. Read More

### Transient Sound Pressure Level

For transient acoustic problems, there are different sound pressure level metrics that have been defined in the literature and in measurement standards. These metrics are important to know when comparing results from a transient acoustic simulation to measurements from a sound level ... Read More

### Harmonic Content of the Power Deposition into a Dual Frequency Capacitively Coupled Plasma

Energy transfer from the time varying electrostatic field to electrons in a capacitively coupled plasmas (CCP) does not exclusively occur at twice the RF frequency. Due to the highly nonlinear mechanism of power transfer from the fields to the electrons, power deposition occurs at ... Read More

### Response of a Rotor Under the Influence of Seal Forces

The fluid flow in seals causes a strong restoring radial force, opposing the shaft motion. Also, there is a cross coupled force due to the axial variation of the circumferential flow. The first type of force always has a stabilizing effect on the rotor, whereas the second one in certain ... Read More

### Gray Body

A gray body with a spherical cavity with various opening areas is simulated using the Heat Transfer, Surface-to-Surface Radiation interface. The emissivity for each case is computed and compared with the classical gray body theory. The COMSOL Multiphysics® result agrees very ... Read More

### Transient Negative Mobility and Negative Differential Conductivity in Xenon

This tutorial model presents a study showing the transient negative mobility and the negative differential conductivity effects in xenon. The stationary and time dependent Boltzmann equation in the two-term approximation is used to compute the electron energy distribution function. ... Read More

### Slider Crank Mechanism

This is a benchmark model to test the numerical algorithms in the area of multibody dynamics. This model simulates the dynamic behavior of the slider crank mechanism. This mechanism goes through singular positions during its operation. The acceleration at a point is compared with the ... Read More

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