how to realize convergence in highly doped semiconductor in COMSOL 4.4
I meet the convergence problem when modeling highly doped semiconductor in COMSOL. What I model is a P-n heterojuction, the concentration of the acceptor is 1e18/cm3, the concentration of the donor is...
View ArticleConverting a 2D Axisymmetric Model into a 2D Model
Hi All I am trying to take the 2D axisymmetric DC Discharge example in the COMSOL Plasma Module and convert it to a conventional 2D model. This is to gain experience with 2D DC discharges as I will be...
View Articleexporting convergence plot data
Hello, I have a somewhat naïve question: how can I export the Convergence Plot 1 or 2 data as a text or csv file? Is there a way? Many thanks in advance, Fred
View Article3D Lithium Air Model
Hello everyone, I am trying to build a 3D Model of a Lithium-Air-battery based on the 1D Version from COMSOL's model library. Everytime I run the simulation i receive the following error after several...
View ArticleImproving Robustness in consideration of changing material properties
Hello Comsol community! I have successfully built the skeleton of my model! However, when I alter the material properties (dynamic viscosity and density in this case), the model stops working. I mean...
View Articleconvergence problem in heat transfer interface
Dear all, When I combine the electric current interface and heat transfer interface,if the setting electric potential (E) is small (1V), and the time domain is short, the simulation works. However, if...
View ArticleModeling Insulin Flow Through Porous Adipose Tissue
Hello Fellow Comsol Users, I am getting stuck attempting to model insulin flow. As of now, I am using laminar flow to model insulin being injected from a canulla into adipose. At this point, I used...
View ArticleConvergence Plot
Hi all, On solving my heat and mass transfer multiphysics problem in comsol 5.2 I got the attached plot for convergence. How can I get an error v/s number of iterations curve? How do I relate inverse...
View ArticleConvergence: when should I stop the model?
Hi everyone I have been working on models that take several days to solve. One of them is running at the moment, and I just have a general question. When I look at the Convergence Plot 2, which is...
View ArticleWhat is convergence?
I'd just like to know what convergence is - in the context of COMSOL.
View ArticleConvergence plots
Does anyone know if it is possible to show a convergence plot during a livelink with Matlab? I'm using version 4.4 and matlab R2013a. Thanks
View ArticleSilicon waveguide convergence value?
Hello. I am studying silicon waveguide using RF module in COMSOL 4.2a version. My questions are what is the convergence in COMSOL multiphysics? is it fine that I got the convergence value which is...
View ArticleDeformed geometry model converges until I try to use the lagrange multiplier
Hi all, I'm trying to model the growth of a cavity in a block of ice in response to a flow of hot air. I have a model that works fairly well, with conjugate heat transfer and a deformed geometry to...
View ArticleModel convergence dependent on mesh quality, confused!
Hi all, My COMSOL model only solves when the mesh size is "above" the predefined Normal size. When I increase the mesh resolution to "Fine" or higher, the step BiCGStab in the progress tab stalls at...
View ArticleDifferent convergence requirement (relative tolerance) for different...
I am working on a time-dependent model that couples two different physics branches. If I disable the second branch in the time-dependent solver, I can get a solution to converge with a relative...
View ArticleGeometry Units and Convergecne
Hello, Does anyone know why changing the "geometry unit" raises convergence issues? For instance, when I change mm to cm, while all other parameters are the same, simulation diverges! Thank you in...
View ArticlePeriodic Stimulation of Electric Currents Interface
Hello, I am trying to simulate an electrode with a periodic biphasic square pulse through a periodic piecewise function to stimulate it. The piecewise goes between 1, -1 and 0 and I multiply it by my...
View Articlecfd simulation
Hello everybody! I would like to know what is the residual and tolerance factors, in the tab solver/fully coupled. How can we change them in order for the solution to converge? Thanks in advance.
View ArticleSolution is not converging for solar cell problem.
Hello everyone, I'm trying to simulate a solar cell with four layers, and I got success with the one dimensional problem. But when I tried the same in two dimensions, the solution is not converging....
View Articlepoor convergence in MEMS electromechanical switch
Greetings: This is a grossly simplified form of a 3D model I'm doing of an electromechanical switch using the MEMS module. There's a cantilever which is at zero bias, a "gate" electrode which is biased...
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