Model Gallery

The Model Gallery features COMSOL Multiphysics model files from a wide variety of application areas including the electrical, mechanical, fluid, and chemical disciplines. You can download ready-to-use models and step-by-step instructions for building the model, and use these as a starting point for your own modeling work. Use the Quick Search to find models relevant to your area of expertise, and login or create a COMSOL Access account that is associated with a valid COMSOL license to download the model files.

Tapered Cantilever with Two Load Cases

This example shows a 2D plane stress model of a thin tapered cantilever. Different boundary and load scenarios are examined. It is demonstrated how to apply and how to evaluate different load and constraint groups. Resulting stresses are compared to NAFEMS benchmark values and they are found to be in good agreement.

A Molten Carbonate Fuel Cell Cathode

The fuel cell presented in this example is the Molten Carbonate Fuel Cell (MCFC), a high temperature fuel cell for stationary applications. The fuel is oxidized at the anode, and can be either hydrogen or natural gas, while oxygen is reduced at the cathode together with carbon dioxide. The electrolyte is defined in the porous electrode and in the free electrolyte, while the solid phase is ...

Polymerization in a Semibatch Reactor

As reactant monomer converts into polymer chains, the density of the reacting mixture often changes notably. In this example you will look at how this effect impacts the total production of polymer in a process. The liquid phase polymerization takes place in a semibatch reactor, where two operating conditions are compared. In the first scenario, the feed of monomer to the reactor is turned off ...

Molecular Flow in an RF Coupler

This model computes the transmission probability through an RF coupler using both the angular coefficient method available in the Free Molecular Flow interface and a Monte Carlo method using the Mathematical Particle Tracing interface. The computed transmission probability determined by the two methods is in excellent agreement with less than a 1% difference. This model requires the Particle ...

Caughey-Thomas Mobility in a Semiconductor

With an increase in the parallel component of the applied field, carriers can gain energies above the ambient thermal energy and be able to transfer energy gained by the field to the lattice by optical phonon emission. The latter effect leads to a saturation of the carriers mobility. The Caughey Thomas mobility model adds high field velocity scattering to an existing mobility model (or to a ...

Distributed SPICE Model of Bipolar Transistor

Integrated semiconductor devices are used in almost all electrical equipment, and the bipolar junction transistor (BJT) is still a very important device although the MOS technology has taken over a large part of the market. Especially in technologies with new types of semiconductors the bipolar transistor can be the best choice for optimum performance. The BJT consists of three semiconductor ...

Argon Boltzmann Analysis

The electron energy distribution function (EEDF) plays an important role in the overall behavior of discharges. Analytic forms of the EEDF exist such as Maxwellian or Druyvesteyn, but in some cases they fail to fit the discharge physics. This tutorial model investigates the effects of various parameters on the electron energy distribution function and rate coefficients for an argon discharge. ...

Thermal Bridges in Building Construction—3D Iron Bar Through Insulation Layer

This model studies the heat conduction in a thermal bridge made up of an iron bar and an insulation layer that separates a hot internal side from a cold external side. The heat flux between internal and external side and the maximum temperature on the external wall are compared them with published values. This example corresponds to the case 4 described in the European standard EN ISO ...

Sheet Metal Forming with Orthotropic Plasticity Hill '48

Metal Forming is the metalworking process of reshaping metal parts through mechanical deformation without adding or removing material. This is mainly based on plastic deformation that enables permanent deformation of the bodies. Here, a numerical simulation of the sheet metal forming process was carried out using an orthotropic material law for metal plasticity (Hill '48). Different forming ...

Ammonia Synthesis PFR

This example demonstrate the modeling of a plug flow reactor for the synthesis of ammonia in the Haber-Weiss process. The catalytic reactor in this process operates under non-isothermal conditions, where temperature and pressure varies substantially along the length of the reactor, in addition to the variation in composition.

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