How to reduce the model file size
Hi, I built a 3D heat transfer, time dependent model. After simulation, the model file goes beyond 5G. Is there anyway I can reduce the file size? I only care how the maximum temperature changes with...
View ArticlePlot on of field on plane, RF MODULE
Dear all, I need help. I have model with two spheres (attachment). I want to plot electric field enhancement but in one plane for one wavelength. I know how to plot electric field for many wavelength...
View ArticlePlot on of field on plane, RF MODULE
Dear all, I need help. I have model with two spheres (attachment). I want to plot electric field enhancement but in one plane for one wavelength. I know how to plot electric field for many wavelength...
View ArticleWeak Boundary on COMSOL 3.5 a COMSOL 4.2a
Hi, I am chemical engineer of the Mexico City. In the work: square_droplet_2Daxi_reset.mph, that this in the comsol version 3.5a, in the tutorial in the step 7: Open the Equation Systyem > Boundary...
View ArticleParametric Sweep and exporting data
Hi, I'm doing a parametric sweep in a model with a geometry that depends on the same parameter wich I sweep. I run my parametric sweep and works well (the solver remeshes the model for each value of my...
View ArticleDefine a selection from the solution
Hi, I am solving a two-phase system and I want to know, how can I calculate the time-dependent rise velocity of the bubble (in the file below)? In my case the domain selection is not possible because...
View ArticlePlasmonic Waveguide
Hello every body. I am trying to simulate a simple plasmonic waveguide in "2D Mode Analysis" to calculate "propagation length" but I have confused. because the conducted result (2.6um) is different...
View Articlewhat does the "exclude algebraic" error estimation option do?
I'm working on a time dependent convection-diffusion simulation. The Peclet number is 10^3 to 10^4. The maximum Reynolds number is ~10. The solution tends to diverge at a point where the input velocity...
View Articlemodel works with identity pairs but not with contact pairs
Any tips on what I am doing wrong in the attached axisymmetric model involving a titanium part with a rounded top that supports a nylon liner that fits inside a titanium "cap"? An approximate image of...
View ArticleScttering problem using comsol4.2
I wanted to calculate scattering absorption cross section and thereby extinction for a nanoparticle. I am not sure how to go for that in comsol4.2. Can anyone please tell a basic flow to accomplish...
View Articlea time dependent matlab function
Hi I'm trying to make a time dependent time function to input as a boundary condition in comsol. I have a vector in matlab and each line is applied in a determinated sampling time in the boundary...
View Articlemodeling a torque measurement setup
Dear All, I am modeling a test setup that is used to measure the torque of a rather unconventional electrical machine called the lateral stator machine. You can see this machine in the attached file....
View ArticleHerschel-bulkley
Hi I'm trying to understand how can i define shear stress parameters for Herschel-bulkley model in Comsol 4.2a The stress expression for this model is: stress = yield stress+m*(shear rate)^n Any...
View ArticleBoundary conditions for strain based loading
Hi, I would like to perform a loading on a 2D specimen using Comsol to obtain a stress-strain curve for shape memory alloy (using the Ginzburg-Laundau model). To obtain the stress-strain curve...
View ArticleSwitched reluctance motor - rotor and stator deformation - How?
Hi. I am building a 2D model in which I would like to showcase how the stator and especially the rotor of a switched reluctance motor deforms because of the radial and tangential magnetic force on the...
View ArticleHelp : Problem facing in opening large file / out of memory processing
I have my simulation file of size 1.5 GB where I am unable to see the results as it is showing "Out of mesh processing" when I am trying to see the plot ( 2D / 3D) etc. Can anyone tell me the shortcut...
View ArticleConstraint for zero velocity in multiphase flow
Hi I am modeling ice formation in a droplet using multiphase flow. The method is based on the fact that when ice phase is formed, I increase the viscosity. The model works perfectly, however, although...
View ArticleWhere to find the definition of "First principal strain" definition formula?
Hello everyone! I am using Comsol 3.5a. I have a question about first principal striain definition in Stucture mechanics module. From "Physics - Equation system - Subdomain Settings", we can see all...
View ArticleLivelink timeout issue
I am having issues with Comsol with Matlab. My loop keeps stopping and I cannot figure out what the problem is. I am clearing out the answer and the model after each iteration. The error is listed...
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