Active discussions in the forum
Announcement: It’s here! Welcome to the new user forum.
The COMSOL discussion forum has a new design and we hope that you find it intuitive and easy to use. Along with the new look, we have focused on improved usability, search tools and tagging, as well as a mobile-friendly... Read more »
Posted 2 weeks ago
Announcement: Now available: COMSOL 5.3 Update 3
Hello, I'm pleased to announce that COMSOL 5.3 update 3 is now available. The easiest way to install the update for COMSOL Multiphysics® is to start the program and then select Check for Product Updates. - If using the... Read more »
Posted 2 weeks ago
Using "withsol" inside of study to extract solutions
I've been struggling to implement the "withsol" operator in my study. I'm trying to model the change in eigenfrequency due to thermal diffusion. However, since the eigenfrequency solver can't take a time series as input, I... Read more »
Posted by Paul Geimer 1 hour ago
Include function as a variable
Hello, I have a problem to define a variable. This is how my variable look like: y^(n-1). y is my shear rate and can also be written as “spf.sr” and n is a variable I defined already. For the function I tipped... Read more »
Posted by Felizitas S. 5 hours ago
Principal stress 2D vs 3D. Stationary vs time dependent solid mechanics
Hi, I have created a 3D model with the same boundary and initial condition as my 2D one in solid mechanics. when I solve the model time dependent, the principal stresses=0 in the 3D model (solid.sp1, 2,& 3), while the... Read more »
Posted by Shirin Moradi 5 hours ago
How to rectify the uploaded screenshots?
The below post is related to an [archived discussion](/forum/thread/15233/cannot-evaluate-the-expression) *** [start here] Read more »
Posted by Priyanka A 1 day ago
Microwave Doppler Flow meter
I'm interested in modelling a microwave plane wave interacting with a moving laminar fluid in order to monitor the doppler shift induced. (Essentially I'm looking at a microwave flowmeter which isn't magnetic based) I can... Read more »
Posted by S.Gunn 1 week ago
Error; how to interpret.
Hi there, I've set up a multibody-model with contact, though when I open the model file, I get the following message: Invalid property error: - Property: segcomp 'Selection' is an array of strings Variable component... Read more »
Posted by David Hoffmeyer 10 hours ago
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COMSOL Blog
Analyze the Electrodynamics of a Magnetic Power Switch via Simulation
Have you ever plugged one too many devices into an electrical circuit? This can overload the circuit and damage its components. To avoid this issue, many homes have... Read more »
Modeling Irregular Shapes: How to Import Curve Data and Loft a Solid
Irregular shapes can come in several different formats. For example, we have previously discussed importing STL files and NASTRAN® meshes into the COMSOL... Read more »
Silicon Photonics: Designing and Prototyping Silicon Waveguides
In 1870, an audience watched as a stage was set with two buckets, one on top of the other. Due to a small hole in the upper bucket, water poured into the lower bucket,... Read more »
Studying the Thermal Performance of Phase Change Materials
Maintaining an even temperature for buildings in hot climates often requires a lot of energy. One option for improving thermal performance is by including phase change... Read more »
Happy Birthday, Sir Mokshagundam Visvesvaraya
Sir Mokshagundam Visvesvaraya (also known as Sir M.V.) was perhaps the most influential engineer in the history of contemporary India. A scholar and statesman, he... Read more »
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