Electrostatics vs Electric Currents Interfaces. Something is wrong...
Hi everyone, I mentioned this in an earlier post. I believe I have an inconsistency with the software (COMSOL Multiphysics Base Package). This may or may not be intended. When picking between the...
View Articleequations implementation
Hello, can you help me please to implente an equation within comsol model, beacause i dont know how to do that??? thank you!
View Article3-D Flow Channel
Hi, I am a Beginner and am unable to Draw a 3-D Geometry in Comsol SoCan anyone please help me with Drawing a 3-d flow channel in comsol. Regards
View ArticleWhich solver type to use for coupled K-Epsilon and pipe flow model?
I have a heat exchanger model that I am solving with the CFD and pipe flow modules. I am unsure of which type of solver I should use. I have looked at the COMSOL example model 'heat exchanger plate'...
View ArticleFree & Porous Fluid Flow -- Measure of mass flux
Hi All, I am attempting to model a stream bottom seepage collection device, but I getting some strange results. I am starting out fairly simple with no lateral flow in the free fluid, and setting the...
View ArticlePeriodic Boundary conditions.
Hi, I’m trying to use periodic boundary conditions to implement asymptotic homogenization of solid mechanics in 2D. The problem is that I have to use periodic boundary conditions but in some cases, I...
View ArticleUsing strain rate as a variable
Hi All, I am using COMSOL 4.2 to simulate plastic deformation of aluminum via a dynamic-viscosity approximation. The approximation requires strain rate. My question is how do I access strain rate for...
View ArticleMeshing Internal Volume of CAD import
All, I am trying to model fluid flow inside of a CAD object. How do I create a domain inside the object that I can mesh? I have capped all the openings. Thanks, John
View ArticleConvergence issues in time dependent moving mesh simulation
Hi all, I'm simulating the evaporation of a sessile droplet (2D-axisymmetric model). The droplet is very hydrophilic and has a very small contact angle (picture attached). The coupled physics are: 1....
View ArticleUsing saved solution Comsol v4.1
hi, I want to use the saved solution for the initialization of the second one. for example I solve my problem with a given boundary condition and I want to increase the boundary value for the next...
View ArticleCoupled magnetic and solid-mechanics simulation
I have a question about coupling a magnetic study to a solid mechanics study. I attach to this email a simple model to explain my question. In the model you can find a permanent magnet with a round...
View ArticleCluster job that shows speed-up when using multiple nodes
Hi, I would be highly interested if someone could post an mph model file that they have shown to see speed-up when distributed across multiple nodes. I am having difficulty seeing any speed up for a...
View ArticleSector symmetry on a 1/5 3D electro motor
Hi All, i have a 3D model that shows only 1/5 of whole motor. It has 3 phase and 5 pool pairs. i'm using rotary machinery modul 3D. if i disabled all continuity BC on the outer slice surface, it...
View ArticleStraw Poll: Who would like to see the model gallery documentation overhauled???
Hello all, I thought I'd post this here to get the community opinions before suggesting it to support. If I want to learn how to use an aspect of Comsol I work through example models and I visit the...
View ArticleTrouble making magnetic flux lines appear
Hey everyone, I am trying to test the flux leakage from a solenoid (in DC) given a variety of core shapes. I am new to Comsol and, after a bit of playing, decided to simplify the problem to the field...
View ArticleProblem with meshing
Sir, While meshing my model, I am getting an error message as follows "Out of memory for mesh processing". What does that error mean and what are the correction requirements??
View ArticlePlease send me tutorial for ultrasonic wave propogation through liquid
I need tutorial on Ultrasonic wave propogation through liquid.
View ArticleEigenfrequency and Temperature in a Cantilever
Hello, I'm using COMSOL for some months. I'm simulating the eigenfrequency of a clamped-free beam (cantilever MEMS). The value of the eigenfrequency at room temperautre is correct (about 6.4MHz) but...
View ArticleDubinin Sorption Model on Dual Porosity System
Hope this message finds you all well. I have a little technical question. I am currently trying to build a dual porosity model using the earth science module of comsol multiphysics 3.5a. However, I...
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