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. 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.
Molecular Flow Through a Microcapillary
Computing molecular flows in arbitrary geometries produces complex integral equations that are very difficult to compute analytically. Analytic solutions are, therefore, only available for simple geometries. One of the earliest problems solved was that of gas flow through tubes of ... Read More
Cascaded Rectangular Cavity Filter
A cascaded cavity filter provides much better bandpass filter performance compared to a single cavity. Out-of-band rejection improves dramatically using a cascaded design. This model uses three rectangular cavity filters coupled via slots. The calculated S-parameters show excellent out ... Read More
HAMSTAD Benchmark 2: Moisture Transport in a homogeneous wall
This case shows how to simulate moisture transport in a homogeneous wall under isothermal conditions. With this assumption, an analytical solution can be calculated. The homogeneous layer is initialized in moisture balance. At the beginning of the simulation, the relative humidity of ... Read More
Thermal Decomposition of Beta-Carotene in a Flow Reactor
This tutorial illustrates how to use the Uncertainty Quantification (UQ) functionality to answer questions regarding sensitivity and reliability of a flow reactor with thermal decomposition. The tutorial investigates what uncertainties in parameters dominates the survival of a nutrient ... Read More
Optimization Tutorials
The App solves various 2D benchmark problems illustrating the pros and cons of the optimization solvers. Read More
Electric Sensor Batch Sweep
This example shows how to image the interior permittivity of a box by applying a potential difference on the boundaries of the box. The result is a surface charge density that depends on the permittivity of the medium inside the box. Read about this tutorial model in our blog post "The ... Read More
Ladder Frame
This example illustrates how to perform eigenfrequency and static analyses of a ladder frame structure for a light truck. Important modeling strategies are described. For example, how to convert a solid geometry to a shell model, how to make different types of connections, and how to ... Read More
Offshore oil platform jacket with calcareous deposits
Full scale, time dependent model of an offshore oil platform jacket utilizing sacrificial anodes, coating breakdown and calcareous deposits on steel surfaces. The tutorial aims to meet some of the common questions for simulations in the oil and gas industry. This of course applies to ... Read More
Cavity Eigenfrequency Modeling Using the Electromagnetic Waves, Beam Envelopes Interface
This model demonstrates three different ways to find the eigenfrequencies of a rectangular metallic cavity. The first method uses an eigenfrequency study step together with the Electromagnetic Waves, Beam Envelopes interface. Here, it is important to define a wave vector for the physics ... Read More
Bipolar Ion-Exchange Membrane
A bipolar membrane consists of one anion-selective, and one cation-selective membrane, in contact with each other. The combined cation and anion selectivity makes the bipolar membrane highly impermeable to all ions, with the exception of H+ and OH- which are formed by water splitting ... Read More