Frequency domain analysis
Hi to all. I'm trying to perform an EIS with a 2d-axial revolution model. The model is composed of TCS-FP and second current distribution but when I try to activate the FP and TCS in the Frequency...
View ArticlePolarization curve in battery module
This is the most basic question and I think here is where I should start. I am trying to simulate a 2D flow battery module and am applying the primary current distribution physics to it. I have...
View ArticleCOMSOL error
Dear all, I am simulating a 2D MODEL of an HBr flow battery. I have put in all the necessary physics and trying to simulate it with an auxiliary sweep for V_cell. The solver computes 4 values and shows...
View ArticleMixed variable boundary conditions
I have two coupled partial differential equations with two dependent variables u(x,y) and v(x,y) to solve. I have a boundary condition with mixed variables u(x,1)+v(x,1)=16. How can I impose such...
View ArticleSpecies crossover in membrane in fuel cell
I am trying to model the crossover of species across the membrane of a fuel cell. It has multispecies flowing across either side of the membrane to the cathodes and anodes. The membrane has some fixed...
View ArticleTransient Pseudo 2D (1+1D) Modeling in Comsol
Hi all, I am interested in transient pseudo 2D (or 1+1D) modeling of a process. In this type of model the only coupling between the two directions comes from the boundary conditions. As an example,...
View Articlehow to model shortcut in flow battery
Hello, I am working on a vanadium flow battery model. The model is used by two Tertiary Current Distribution and on Secondary Current Distribution physic fields. You can find a simplified version in...
View Articlequestion about the surface area and line length in time-dependent simulation
Hi everyone, I am now running a time-dependent simulation about an electroplating process using moving mesh, and I want to know the surface area of each electrode in each time step. Can anyone help me?...
View ArticleCathode aging in Li-ion battery
Please advise if there are any tutorials/models on how to simulate cathode material aging (capacity fade) in Li-ion battery. Thank you!
View ArticleOverpotential Definition
In the user guide for the electrochemistry branch, overpotential is often defined as the difference between electric and electrolyte potential and the reversible potential, i.e. eta = phi_s - phi_l -...
View ArticleCPU Clock Usage
Hello, Me and my mentor are using an Intel Xeon e5 v4 processor with 3.70 Ghz maximum frequency on Windows 10. We are solving battery problem with heat transfer coupling. As we noticed, while the...
View ArticleTwo Phase Transport PEMFC
Hi, I'm having problems in implementing the two phase transport in the Low-Temperature PEMFC model. Initially, I built a model composed by the following physics: 1. Secondary Current Distribution; 2....
View ArticleHow to apply both voltage and current simultaneously to the cable?
Hi, everyone, I build a model to study the magnetic field and electrical field of two cables. I have the voltage data and current data. But how can I apply both voltage and current simultaneously to...
View ArticleIncreasing the cycle number for Lithium ion capacity fade simulation
Hi, My name is Frank and I am graduate student new to using the Comsol software. I am currently having issues increasing the cycle number from 2000 cycles up to 4000 cycles for capacity fade of a...
View ArticleModelling Natural Convection
I'm a new user to Comsol, having used other FE and CFD packages and I'm having difficulty with getting a test model with natural convection to run successfully. I've followed the examples in the help...
View ArticleBoundary condition at the membrane-electrode interface
Hi all, I am trying to model a H2/Br2 redox flow battery and presently having some problems regarding the boundary condition at the interface between the electrolyte in the model (membrane) and the...
View ArticlePN optical modulator
Hello, I am a student in TUD and I have started to work with COMSOL. My task is to model and simulate PN silicon optical modulator. I am using Semiconductor module. I have couple of questions I would...
View ArticleLi-Ion Battery Example - Works in 3.5a but not 4.0
I have recently implemented the provided COMSOL 3.5a example of a lithium ion battery in version 4.0. The problem, as stated, solves just fine in 3.5a with easy adjustment of the applied current, and...
View ArticleError on simulating Lithium-Ion tutorial
Hello, i was trying to do the tutorial of simulating a 2D lithium-Ion battery (www.comsol.com/showroom/gallery/9981/), b ut when i try to execute my simulation i get the following errors: Failed to...
View ArticleAdding an extra dimension to 1-D battery model
Hi all, I am working on modeling and simulation of Li-ion battery. My model is pseudo-2-dimensional one. So I need an extra dimension to consider diffusion equation in solid phase of porous electrode...
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