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.


Ion Funnel

An electrodynamic ion funnel provides an efficient means of transferring ions from regions of high pressure to high vacuum. The ion funnel can couple devices which generally operate at pressures of different orders of magnitude, such as ion mobility spectrometers and mass spectrometers, allowing mixtures of ionized gases to be separated and analyzed while minimizing losses. This model ...

Quadrupole Mass Filter

A quadrupole mass filter (QMF) is a key component of a modern mass spectrometer. A QMF uses direct current (DC) and alternating current (AC) electric fields to analyze positive or negative ions by mass to charge ratio. A QMF consists of 4 parallel rods spaced equidistantly, the ratio of the rod radius to the radius of the inscribed circle is 1.148. Opposite pairs of rods are electrically ...

Axial Homopolar Induction Bearing in 3D

This model illustrates the working principle of an axial homopolar induction bearing. An electrically conducting rotor rotating in a magnetic field produced by a permanent magnets induces eddy currents on the conducting rotor. The eddy currents, in turn, produce a magnetic field that opposes the magnetic fields by the magnets and induces a force that opposes the motion of the rotor. The axial ...

Applying a Current-Voltage Switch to Models

This example exemplifies how to model the switching between current and voltage excitations in *Terminal* boundary conditions. A more detailed description of the phenomenon and the modeling process can be seen in the blog post "[Control Current and Voltage Sources with the AC/DC Module](https://www.comsol.com/blogs/control-current-and-voltage-sources-with-the-acdc-module/)".

Magnetic Stiffness of an Axial Magnetic Bearing in 3D

The model illustrate the technique to calculate the magnetic stiffness in a 3D geometry of a permanent magnet axial magnetic bearing. The *Magnetic Fields* physics is used to model the bearing and compute the magnetic forces. The *Deformed Geometry* and *Sensitivity* physics are used to compute the magnetic stiffness. This model is featured and explained in much greater detail in the following ...

Winding Designer for Electrical Machines

You can use this simulation app as a guide on how to automate selections using the Application Builder. In the example app, the selection algorithm depends on the relationship between the electrical and mechanical angles, which are generally used in the design of windings in electrical machines. Get more details in our blog post: [How to Automate Winding Design in Electrical Machines with an App](https://www.comsol.com/blogs/how-to-automate-winding-design-in-electrical-machines-with-an-app/) ...

Electromagnetic Force Verification Series

In this set of verification models and associated documentation, the accuracy of electromagnetic force calculations is investigated. Using various techniques, the total force and torque on a rigid body is determined and compared to analytical models. Using fillets, advanced meshing and exterior force-probe surfaces the accuracy is greatly increased. The boundary element method (BEM) and the ...

Radial Magnetic Coupler in 3D

Radial magnetic coupling between two permanent magnet rotors is modeled using the Rotating Machinery, Magnetic interface. The permanent magnets in the inner and the outer rotors are outward flux-focused and inward flux-focused to maximize the coupling torque.

Single-Phase Induction Motor: TEAM Workshop Problem 30

This is a single-phase induction motor model from the Transient Electromagnetic Analysis Method (TEAM) workshop problem 30. The electromagnetic torque, induced voltage, and rotor losses are computed with COMSOL Multiphysics at various rotor speed and compared with the results from TEAM workshop problem 30. The Magnetic Fields physics interface is used to model the motor in the frequency domain ...

Self demagnetization of a cylindrical AlNiCo magnet - new

Soft permanet magnets like AlNiCo are easily demagnetized if handled incorrectly. This is a demonstration of the modeling the self demagnetization of a cylindrical AlNiCo magnet when moved out of its associated/protective magnetic circuit. The modeling is performed in three steps: # 1. The soft magnet protected by the magnetic circuit. 2. The self-demagnetization of the soft magnet when moved ...

91–100 of 100
Next |
Last