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.


Atmospheric Corrosion

This model simulates atmospheric galvanic corrosion of an aluminum alloy in contact with steel. The electrolyte film thickness depends on the relative humidity of the surrounding air and the salt load density of NaCl crystals on the metal surface. Empirical expressions for the oxygen diffusivity and solubility are also included in the model in order to derive an expression for the limiting ...

Capacitively Coupled Plasma

The NIST Gaseous Electronics Conference has provided a platform for studying Capacitively Coupled Plasma (CCP) reactors, which is what this application is based upon. The operating principle of a capacitively coupled plasma is different when compared to the inductive case. In a CCP reactor, the plasma is sustained by applying a sinusoidal electrostatic potential across a small gap filled with a ...

Energy Conservation with Thermoacoustics

This small tutorial model studies energy conservation in a small conceptual test setup. The model has an inlet and outlet and a Helmholtz resonator with a very narrow neck. The acoustics in the narrow neck are modeled with Thermoacoustic for a detailed analysis of the thermal and viscous losses. In order to study and verify energy conservation, the model compares the total dissipated energy in ...

Poroelastic Waves with Thermal and Viscous Losses (Biot-Allard Model)

In applications where pressure waves and elastic waves propagate in porous materials filled with air both thermal and viscous losses are important. This is typically the case in insulation materials for room acoustics or lining materials in car cabins. Another example is porous materials in mufflers in the automotive industry. In many cases these materials can be modeled using the Poroacoustic ...

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 ...

Slip Flow Benchmark

This model is a benchmark model for the Slip Flow interface. It is based on both analytic and numeric calculations. Air at atmospheric pressure flows through a conducting micro-channel connecting two reservoirs maintained at different temperatures. A flow between the two reservoirs develops as a result of thermal creep along the channel wall, which in turn produces a pressure gradient. At steady ...

Eigenmodes in a Muffler

In this model, compute the propagating modes in the chamber of an automotive muffler. The geometry is a cross-section of the chamber in the Absorptive Muffler example. The model’s purpose is to study the shape of the propagating modes and to find their cut-off frequencies. As discussed in the documentation for the Absorptive Muffler, some of the modes significantly affect the damping of the ...

Circular Waveguide Filter

A circular waveguide filter is designed using a 2D axisymmetric model. Six annular rings added to the waveguide form circular cavities connected in series, and each cavity cutoff frequency is close to the center frequency of the filter. The simulated S-parameters show a bandpass frequency response.

Heterogeneous Model of a Porous Catalyst

A catalyst particle with a hypothetical microstructure is described in detail. The heterogeneous description is approximated in a second model with a homogeneous particle and the results from the two approaches are compared. See: https://www.comsol.se/blogs/modeling-approaches-in-heterogeneous-catalysis/

Inflation of a Spherical Rubber Balloon - Membrane Version

The purpose of this model is to illustrate how the Membrane interface can be used to model thin hyperelastic structures. The example is identical to the Model Library model 'Inflation of a spherical rubber balloon', except that the Membrane interface is used instead of the Solid Mechanics interface.