Concentration dependent Butler-Volmer equation
Is there any difference between Concentration dependent Butler-Volmer equation and Normal Butler-Volmer equation? I have built a PEM fuel cell model,and my results didn't show the influence of...
View ArticleHow do I add apparent resistivity with comsol？
Hello,I recently began using COMSOL and I have some questions. I created a simple ground model (2D), with resistivity 200 ohmm and a small parallelepiped in its center with resistivity 10 ohmm. I...
View ArticleModelling
I am new to comsol, how to bend the sharp edges of a cube? Is there any feature in comsol 5.4 related to this.
View ArticleDifferent temperature profile if I break up a domain into three domains with...
This happened when I was doing a electromagnetic heating solution. When I divide one domain of a metal into three domains, still all with the same material, the result is totally different... I am...
View ArticleCOMSOL Semiconductor Module
Hello Can I use COMSOL software's Semiconductor Modules to build MOS transistors with short-channel effects? Thanks
View ArticleHow to save model data when we compuate the model on the linux system
dear engineer recently, i meant a situation that my computer were not sutiable to running the model , so i decide to simulate the model on the linux system, but until i realized that i couldn't save...
View ArticleNo changes in volume of fluid for Condensation with level set
Dear all,I am going to simulate the droplet condensation (from vapor to liquid) with the latest version of COMSOL. To do that, I think I need the Laminar Flow(spf), Level Set(ls), and Heat Transfer in...
View ArticleError: The recorded Historical maximum value decreases during simulation?!
Dear All:I followed the approach given in the Blog article, https://www.comsol.com/blogs/using-the-previous-solution-operator-in-transient-modeling, to record the maximum historical value. The...
View ArticleCOMSOL Multiphysics® Intensive Online Training
I registered for COMSOL Online training program which is scheduled to commence from 20 Jan 2020. However, during purchase of the same, the payment failed. Now I am not able to see the payment...
View ArticleError of ray tracing model
The Solver displays a warning: Some rays were not released because the maximum number of secondary rays was reached when the time was 4.408826637143696e-012.
View ArticleHow to convert into Time dependent analysis
Hi, in the attached comsol library file regarding Li-ion Thermal 3D analysis, study 3 (Heat) is analysed in stationary format. How to convert that into "Time Dependent" analysis?
View ArticleWhy can't I get the right acoustic displacement field for a phononic band gap...
We mainly investigate the forward Brillouin scattering in photonic crystal fiber. Recently we fabricate a PCF with phononic band gap. And the frequency of the core resoant mode just lies inside the...
View ArticleFriction heat due to interface compression caused by sinusoidal vibration
Can comsol calculate the frictional heat generated by the interface compression deformation caused by sinusoidal vibration?Recently, I have been trying to perform sinusoidal vibration on two flat...
View ArticleUnable to install Femlab ecre v3.1 from 2004 CD
The below post is related to an archived discussionUnable to install Femlab ecre v3.1 from 2004 CD. Error. Have tried changing the environment setting. Have tried making win32 bit installer possible....
View ArticleDifference between laser heating and microwave heating
Hi, I got a question about the heat transfer module in comsol. The version I used is 5.3a.There is a electromagnetic heating branch under the heat transfer module, which contains two sub-branchs: laser...
View ArticleHeat transfer in solid and Phase change material
The below post is related to an archived discussion[start here]I developed a time-dependent model for a model that has phase change material. Please see the attached file. The Boundary conditions that...
View Articlehole on block
how can I make two holes on left and right side of block? please I need a detailed explanation. Thanks
View ArticleComsol solver friezes and doesn't use RAM
I am running Comsol 5.5, on win 7, 64 bit, with 32 GB of RAM, Solving a simple thermal stress problem. It was fine around 2 months ago, but now when I run that very same model, the answers aren't...
View ArticleError: invalid ELF header - Trying to call a Matlab function from COMSOL
Steps to get the error:From Ubuntu, I do start COMSOL as:comsol -mlroot /usr/local/MATLAB/R2019b -forcegccWithin COMSOL, under the "Global definitions" node, Functions = "/home/miguel/Desktop/PCE...
View ArticleErrors：Undefined value found Linsolv, NaN or Inf found when solving linear...
Respect Sir or Madam， I have built a 3Dmodel of two-phase flow, But when I was doing transient calculations, the report had a warning: Failed to sample error estimate, use initial value estimate, and...
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