Active discussions in the forum
Announcement: COMSOL News 2018 is now available!
Hello! We are excited to announce that this year's edition of COMSOL News is now available: [comsol.com/offers/comsol-news-2018](https://www.comsol.com/offers/comsol-news-2018) Read the magazine to see how simulation... Read more »
Posted 3 weeks ago
Edge rotation for shell with prestressed eigenfrequency analysis always gives 0
Hello! I'm having troubles trying to evaluate the rotation of one edge of a shell element around the axis parallel to it (in my case, the z axis). I'm running a prestressed eigenfrequency study, i.e., a two-step study with... Read more »
Posted by Carlo Resta 4 hours ago
Discretization tool not available
Hi, I'm attempting to switch the discretization in a solid mechanics beam problem from linear to quadratic lagrange elements (or back again.) From what I understand most people can see the discretization option under the solid... Read more »
Posted by Liban Jibril 4 hours ago
Energy loss in symmetric heated turbulent flow
Hello, I created a simplified model which just simulates the flow of heated air through a pipe, heating up a small piece of the pipe-wall. It´s completley symmetric, so I decided to use the symmetrie line in the center.... Read more »
Posted by Henrik Bode 8 hours ago
Coupling between rf and electric currents
I would like to set a fixed potential in the rf module. If I use the lumped port I can set a potential, but this only applies if wave exication is enabled. When I activate this, my model becomes very complicated and the solver... Read more »
Posted by Dejan 8 hours ago
Issues with meshing in Comsol for Matlab
I am using MATLAB to run optimization loops on my COMSOL model. I do change some model input parameters in the optimization, but it doesnt change the number of domains or boundaries, only the size of them, so I dont expect that... Read more »
Posted by Nathan Wiegman 9 hours ago
Solver problem - Multigrid sublevel has more degrees of freedom than top level
Hi, When I run a computation for my model for laminar flow, comsol returns the error "multigrid sublevel has more degrees of freedom than top level". Does anyone know how I can fix this? Maybe I should change into another... Read more »
Posted by PY 10 hours ago
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COMSOL Blog
Happy Birthday, Gustave-Gaspard Coriolis
Gustave-Gaspard Coriolis was a French physicist with a passion for mechanics. He spent much of his time contemplating the nature of movement in machinery and introduced... Read more »
Analyzing Magnetotellurics with Electromagnetics Simulation
Mount Erebus, one of Earth's most remote volcanoes, sits covered in snow and ice. These chilly surroundings can be misleading, as Mount Erebus has another claim to... Read more »
Studying the Decoupling Effect of Electromagnetic Band Gap Structures
Thanks to their ability to "tune out" specific frequencies, electromagnetic band gaps (EBGs) are found in many different applications. EBGs can suppress unwanted... Read more »
Two Methods for Modeling Free Surfaces in COMSOL Multiphysics®
There are four methods for modeling free liquid surfaces in the COMSOL Multiphysics® software: level set, phase field, moving mesh, and stationary free surface. In the... Read more »
Happy Birthday, Inge Lehmann
What's at the center of the earth? To answer this question, Inge Lehmann, a Danish geophysicist and seismologist, used seismic waves generated by earthquakes to study... Read more »