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.


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 ...

One-Family House Acoustics Analyzer

The One-Family House Acoustics Analyzer app is used to assess noise propagation in coupled rooms inside of a two-story house consisting of ten rooms. The app determines the sound pressure level (SPL) distribution in the house based on a number of sources that are interactively placed throughout the home. It represents a classical room acoustics problem where engineers or architects want to ...

Dielectric Resonator Antenna

A dielectric resonator placed near a radiating element can be used to increase directivity and gain. Here, a block of quartz dielectric, with additional passive metallic antenna elements, is placed above a slot antenna. The fields in and around the antenna are solved for. The far field pattern and impedance is computed and improved performance is seen.

Electrodeposition of an Inductor Coil

This example models the deposition of an inductor coil in 3D. The geometry includes the extrusion of the deposition pattern into an isolating photoresist mask, and a diffusion layer on top of the photoresist. The mass transfer of copper ions in the electrolyte has a major impact on the deposition kinetics, resulting in higher deposition rates in the outer parts of the deposition pattern. The ...

Water Hammer

When a valve is closed rapidly in a pipe network it gives rise to a hydraulic transient known as a water hammer. The propagation of these hydraulic transients can in extreme cases cause failures of pipe systems caused by overpressures. This is a model of a simple verification pipe system consisting of a reservoir, a pipe, and a valve. The valve is in this model closed instantaneously.

Doppler Shift

We have all noticed the Doppler effect when an ambulance passes by with its sirens blaring. The siren’s pitch suddenly drops the moment the ambulance starts moving away from you. Another effect you can notice is how the siren’s sound is very loud when nearby, but as soon as the ambulance has passed the sound becomes much quieter. This model simulates the acoustic Doppler effect by placing ...

Ideal Cloak

This model demonstrates the use of optical tracing for studying optically large gradient-index structures with anisotropic optical properties. Additionally, the model introduces a smoothing technique for handling discontinuities of refractive index on curved surfaces, which are typical in conventional optical devices such as lenses.

Chemical Reactions and Soot Build-Up in a Diesel Filter

In this tutorial, a filter system for a diesel engine is modeled, including where a soot layer builds up and is oxidized. The build-up of the layer is held in check by both catalytic and non-catalytic reactions, where carbon is oxidized to carbon monoxide and carbon dioxide, which in turn passes through the membrane. A filter system's efficiency and durability is closely related to the manner ...

Charge Exchange Cell Simulator

A charge exchange cell consists of a region of gas at an elevated pressure within a vacuum chamber. When an ion beam interacts with the higher-density gas, the ions undergo charge exchange reactions with the gas, creating energetic neutral particles. It is likely that only a fraction of the beam ions will undergo charge exchange reactions. Therefore, in order to neutralize the beam, a pair of ...

Lithium-Ion Battery Impedance Application

The goal with this application is to explain experimental electrochemical impedance spectroscopy (EIS) measurements and to show how you can use a simulation app along with measurements to estimate the properties of lithium-ion batteries. The Lithium-Ion Battery Impedance app takes measurements from an EIS experiment and uses them as inputs. It then simulates these measurements and runs a ...