Deformed geometry from one step does not carry-on into the next study step ?
Hi all, I recently started using V4.3. My model, involving two physics, has three study steps in one study where the solution of previous steps fed to the successive steps as initial conditions. In the...
View ArticleCOMSOL 4.4 client / server version mismatch
I'm trying to connect to our remote server (headless Linux box, running COMSOL 4.4.0.248) from my desktop (Mac under Yosemite, running COMSOL 4.4.0.361) to solve a large magnetostatic problem. Both the...
View ArticleWhy "Tin Melting Front" tutorial don't work with stationary solver?
Hello! There is an interesting question. I study the tutorial model "Tin Melting Front". This is Time depended model as it presented. However, this problem obviously has a stationary solution. So, why...
View ArticleModeling LiIon Battery Load Cycles
I've been working with the lithium ion battery module quite a bit, and I keep running into the same problems - load cycle discontinuities are making the solver spit out errors left and right. I've...
View ArticleSimulate elastic substrate
I am very new to Comsol and trying to simulated a elastomeric substrate with nanoparticle filled in it. I have following problems I simulated only a rectangular film made of elastomer. I applied load...
View ArticleCalculating the net generated energy
Hi all, I am using the Joule Heating module, so in my 3D structure there is both energy generation due to Joule Heating and loss due to convective and radiative heat flows. Maybe it is also a good idea...
View ArticleFloquet boundary conditions in multilayer structure.
Hi all, I am trying to simulate a multi junction solar cell (for eg: Si/SiO2/Al) and trying to study the electromagnetic behavior of it. For periodic conditions I had used floquet boundary conditions,...
View ArticleModelling laser ablation in COMSOL
Hi, I have a fairly simple question about COMSOL. I have made a model in which a block is heated by a pulsing laser heat source. I am using an iterative approach to solve it by solving for each pulse...
View Article"Internal error in boundary respecting." and "Out of memory during assembly."
Dear All I have two errors in my microfluidic models about "Internal error in boundary respecting." and "Out of memory during assembly.". At first I tried to simulate the flow of the overall 3D...
View ArticleCalculating the net generated energy
Hi all, I am using the Joule Heating module, so in my 3D structure there is both energy generation due to Joule Heating and loss due to convective and radiative heat flows. Maybe it is also a good idea...
View Articlelight simulation
Hello everyone, I try to simulate the light diffusion providing from a scattering optical fiber. The source is a LASER light (about 630 nm) . I define 3 geometries : - the block which contains the...
View ArticleSimulation error
Hi , I am getting this type of error whey i am trying to start simulation. "Variables property does not include all variables in Xmesh" Could anybody can give me any solution/ suggestion. Thank you...
View ArticleHardware Question
I've read through several posts and am cognizant of the RAM/cpu core guidelines on performance. With that being said, is there a limit on the priority that should be placed on RAM/core when specifying...
View ArticleMemory usage
Hi everyone. I have a few questions. 1. Is it possible to put the calculation on pause? 2. Is it possible to save some intermediate state of the calculation? (for example, after the 2nd iteration to...
View ArticleJava Runtime Environment error
Getting following error, A fatal error has been detected by the Java Runtime Environment: # # SIGSEGV (0xb) at pc=0x0000003da3efbc6c, pid=6909, tid=46912497239488 # # JRE version: 6.0_20-b02 # Java VM:...
View ArticleEigenvalue in constraints
I need to solve a PDE eigenvalue problem in which the eigenvalue appears in the boundary conditions (constraints). I am aware that the documentation states that "the eigenvalue itself is not supported...
View ArticleHow to apply AC voltage
Hello, Can some one tell me how can i apply the AC voltage in basic Busbar Tutorial in version 4.4 Thanks Best Regards, Ahmed
View Articlesurface integration for parametric sweep simulation
Hi all, I have performed a stationary electric current simulation with parametric sweep. I need to find the total current passing through a surface of my geometry and for the aim I have used the...
View ArticleVariable modifications between solution iterations
I'm developing a transient model using the Livelink interface. The model first calculates an initial solution for the first time window, then I would like to modify the state variable values due to...
View ArticleERROR: nonlinear solver did not converge, when simulating ball movement in...
Hi all, I have seen several threads about this error and tried to figure it out myself using the sample cases but I still fail to simulate this. Any help will be greatly appreciated. I am trying to...
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