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General Blog Posts

Using Deformations to Visualize Physical Motion

April 28, 2015

When simulating acoustic waves, vibrating mechanical hardware, or fluid in a channel — just to name a few applications — you may be interested in visualizing the movement or shape change in a device. Postprocessing and visualization can help enhance your understanding of simulation results, and using plots to illustrate physical motion allows you to put everything into perspective. Deformations are a great way to accomplish this.

Implementing the Weak Form with a COMSOL App

April 16, 2015

Previously in our weak form series, we discretized the weak form equation to obtain a matrix equation to solve for the unknown coefficients in our simple example problem. Following the same procedure as in this previous blog post, we will implement the equation in the COMSOL Multiphysics® software with additional steps included to examine the matrices. We will find it more convenient to use a COMSOL® software application to display all relevant matrices at once, arranged logically on one screen.

What to Expect from COMSOL Multiphysics Version 5.1

April 15, 2015

Today marks the release of COMSOL Multiphysics version 5.1. The latest COMSOL software version brings you 20 demo apps and many new features and functionality updates to numerous products. Here’s what you can expect after downloading version 5.1.

Modeling Laser-Material Interactions with the Beer-Lambert Law

April 13, 2015

High-intensity lasers incident upon a material that is partially transparent will deposit power into the material itself. If the absorption of the incident light can be described by the Beer-Lambert law, it is possible to model this power deposition using the core functionality of COMSOL Multiphysics. We will demonstrate how to model the absorption of the laser light and the resultant heating for a material with temperature-dependent absorptivity.

Can We Hear the Shape of a Drum?

April 1, 2015

Over half a century ago, Mark Kac gave an interesting lecture on a question that he had heard from Professor Bochner ten years earlier: “Can one hear the shape of a drum?” He focused on the (then undetermined) uniqueness of the set of eigenvalues given the shape of a vibrating membrane. The eigenvalue problem has since been solved and here we explore the “hearing” part of the question by considering some interesting physical effects.

Improving Your Meshing with Partitioning

March 27, 2015

Often, the most tedious step of finite element modeling is subdividing your CAD geometry into a finite element mesh. This step, usually just called meshing, can sometimes be fully automated. More often, however, the careful finite element analyst will want to semi-manually create their meshes. Although this does require more work, sometimes there are significant advantages in doing so. In this blog entry, we will look at one of the key manual meshing techniques: the concept of geometric partitioning.

Curve Fitting of Experimental Data with COMSOL Multiphysics

March 19, 2015

We often need to work with experimental data in COMSOL Multiphysics, usually to represent material properties or other inputs to our model. However, experimental data is often noisy; it contains experimental errors that we do not want to introduce into our simulations. In this blog post, we will look at how to fit smooth curves and surfaces to experimental data using the core functionality of COMSOL Multiphysics.

Your Introduction to the COMSOL Server™ License

March 17, 2015

Want to share your simulations with the world or simply your own team? After you build an application with the Application Builder in the COMSOL Multiphysics® software, you can share your app using a COMSOL Server™ license with anyone from colleagues to customers. Here is your introduction to COMSOL Server™ — what it is, why to use it, and a brief overview of how to get started.


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