Active discussions in the forum
Announcement: Now available: COMSOL 5.3
Hello, I'm pleased to announce that COMSOL 5.3 is now available for download. Release highlights: - Dramatic speedup for handling large models - New powerful and user-friendly solver for CFD - Boundary element method... Read more »
Posted 4 weeks ago
Parallel computing MatLab Comsol
Hi, I am using Comsol 4.3 with Livelink for Matlab. I run an optimization code in Matlab where i call Comsol to perform frequency response simulations. Now i would like to start two parallel frequency response simulations... Read more »
Posted by Anders Gudmarsson 19 minutes ago
Time Dependent Solver
Hi, Can anyone explain the methodology for the relative tolerance for a time-dependent study? For example, the default value is 0.01 (physics based tolerance) and if I change the value to 1e-9 then the solution takes much... Read more »
Posted by Daipayan Sarkar 21 minutes ago
how to track a single particle among surface injection in particle tracing model
i am trying to understand the relationship of particle's initial position and it's movement i used mesh based injection for the inlet. does anyone know how to track a single particle among hundreds of particles? whenever i... Read more »
Posted by Yu Zhao 9 hours ago
Meshing
I am trying to mesh CFRP and copper material, but there is so much size difference that i am unable to do it. any help? Read more »
Posted by Prashant Katiyar 11 hours ago
Error: "Attempt to evaluate negative power of zero."
I'm building a model using the Reaching Flow in Porous Media in a 2D axis-symmetric component, and my goal is to remove some of the dilute species from the system as a function of concentration and fluid velocity (e.g. the... Read more »
Posted by Garrett Jeffries 13 hours ago
Particle tracing for part particles (not all)
Hi everyone, When creating the trajectories, can I only plot some particles (eg. those particles reach a certain surface) rather than all released particles? Maybe I can use the data set to isolate those particles, but how... Read more »
Posted by Xiaolong Li 15 hours ago
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COMSOL Blog
How to Model Gearbox Vibration and Noise in COMSOL Multiphysics®
Gears are used in a variety of applications, such as clocks, industrial machinery, music boxes, bicycles, and automobiles. A gearbox is a major source of vibration and... Read more »
How to Analyze Eigenfrequencies That Change with Temperature
In some applications, particularly within the MEMS field, it is important to study the sensitivity of a device's eigenfrequencies with respect to a variation in... Read more »
Studying the Artificial Ground Freezing Method with Simulation
When the German engineer F. H. Poetsch first developed the artificial ground freezing (AGF) method in 1883, he did so to avoid water within Belgian coal mines. The... Read more »
How to Add Stop Conditions to Solvers in COMSOL Multiphysics®
Sometimes a simulation runs longer than needed, not giving us a way to monitor intermediate results or stop conditionally. This can leave us staring at the monitor,... Read more »
Introduction to Modeling Stress Linearization in COMSOL Multiphysics®
In some applications, it is necessary to approximate a general 3D stress state by a set of linearized stresses through a cross section of a thin structure. This is... Read more »
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