Internal/Compressive stress in a material
Hello everyone, I have a question about internal stress generation in Comsol. My model consists of two different materials on top of each other. One of the materials (the most outside material in the...
View ArticleLinear induction motor with AC/DC Module
I'm trying to simulate a linear induction motor in comsol using the Magnetic fields physics in the AC DC Module and I am facing a couple of issues. 1. BH_Cuves and non linear solver: I would like to...
View ArticleSpecifying maximum tensile strain in Comsol
Hi everyone, My question is on material properties available in Comsol. I'm using the solid mechanics module of Comsol, and the analysis type is stationary. Currently I have included an elasto-plastic...
View ArticleLarge Magnetic Force
Hello I'm modelling a simple E-shaped core made of iron and everything looks fine to me (!) There is an air gap between the core and the armature to which the magnetic force is applied. The magnetic...
View Article2-Step Full Field followed Scattered Field Simulation
I am trying to solve for the scattered electric field from a gold nanoparticle on a semiconducting substrate, using a 2-step process identical to the example file "Scatterer on Substrate." When solving...
View ArticleContinuity equation and momentum equation
Hi.. i'm new in comsol.. i'm doing 2 d simualation of wind passes through the hill by comsol multiphysics 4.2. May i know, did i need to specify momentum and continuity equation (ux+vy=0 and...
View Articlehow did I acquire the position of particles in particle tracing module
I have a confusion which is to get the data of particles when I use matlab linking with comsol. But the function of mpheval is error. For instance, qx=mpheval(model,{'qx'},'dataset','part1','t',0);...
View ArticleError from the Modal Frequency Response analysis
Dear all, I am trying the Modal Frequency Response analysis tutorial with the elbow bracket example in the Model Library. However, if I try to run the tutorial model file for modal frequency response...
View Articlesine excitation
Hi all. I am performing a 2D frequency analysis in the Structural Mechanics Module. I want to apply a prescribed displacement on the left boundary and to see which waves propagate inside the medium....
View Articlehow to set up the ions in water dans my nano-fluidics
hi everyone, I'm trying to simulate the nanofluidics covered by a layer of SiO2 of which the thickness is about 50nm. In the nanofluidicsm there is water or other liquid. First of all, I set the...
View Articleport boundary condition vs. PML+port boundary condition
Hi all, I get different results when I use port boundary condition and PML together than when I only use port boundary conditions for input and output. I've calculated transmittance and reflectance and...
View ArticleComsol 4.3a Memory problem -- not using enough RAM
Hello everyone, Usually the complain is that Comsol is using too much memory, but in my case its other way round. I have a really nice machine in the lab with windows 8 server. I have Comsol version...
View ArticleContact problem. Static vs Dynamic
I have an impact model; steel presses down soft tissue. I can solve this model in static analysis with prescribed displacement. But when I solved the model in dynamic analysis with prescribed velocity,...
View ArticleTwo solids in contact with relative movement
Hi I was wondering if there are any comments on the problem that I am working on it at the moment. Basically, consider two solid cylinders (like piston and cylinder) that the first one is moving inside...
View ArticleCOMSOL closed during computation
Hi, My model includes an electrostatic module and three convection and diffusion modules. The model did work well for some times, but recently the COMSOL keep closing during computing with the same...
View ArticleParticle energy distribution
Hey Comsol gurus, I am trying to simulate complex particle distributions in electric and magnetic fields. The mf and es parts are working quite nicely but I am experiencing some difficulties setting up...
View ArticleParticle Tracing Plot
Dear Comsol Community, I am simulating particle tracks in a mass spectrometer. I would like to know the particle positions after they exit the magnet, i.e. when they hit a screen. I would like to make...
View ArticleLinear Boundry Load
hi, My model is a simple square geomechanical model. I am going to apply a linear boundary load along the right side of square but there is no option for doing this. Could you please help me with this....
View ArticleB-H curve for Soft Iron
Hello there ! I am about to use (soft iron) as a core for a saturable device . I need to specify the H( knee) & B(sat) points, but the listed values of B & H in the BH curve seem to away...
View ArticleNegative effective strain (solid.epe)
Hello! I'm doing a thermo-mechanical transient process, however, when I evaluate the effective plastic strain versus time at certain points, I get negative values for effective plastic strain (ts.epe...
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