How to calculate an integral in COMSOL Multiphysics with some step-by-step examples. An integral is very often needed when you need to compute some user-defined postprocessing variables, e.g., lift, drag, heat flux, or any other.

Every COMSOL plot you've ever admired for its gorgeous, gradient-smooth color field has been touched up. COMSOL averages your results before it draws them. The smooth field on your screen is not exactly what the solver computed. It's called smoothing. How to work with smoothing and what are the best practices?

When you run a time-dependent coupled simulation, let's say, a Joule-heating problem where both temperature and electric potential evolve over time, exporting two separate animations and watching them separately is clunky. COMSOL gives you at least two clean ways to place multiple plot groups side by side inside a single animation. This article walks through both: the modern Array approach available since COMSOL 5.x, and the classic Deformation-node offset trick that still wo

If you have ever simulated a large 3D model in COMSOL Multiphysics and watched your hard drive fill up within minutes, you already know the problem. By default, COMSOL stores the full solution across the entire mesh — every node, every element, every physics variable — for every time step or parameter value in your study. For a fine-mesh with millions of degrees of freedom, that data can easily balloon into tens or even hundreds of gigabytes. The good news is that COMSOL give

In CFD, the quality of your results is determined long before you press the Run button. In this article, we provide you with our “pre-flight” checklist for nearly every CFD simulation.

From time to time, we receive questions about which functions in COMSOL Multiphysics we appreciate the most. Here are the key features of this commercial tool, sorted from the most popular among consultants collaborating with Simulation Guys.