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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...

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Polarization 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...

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COMSOL 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...

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Mixed 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...

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Species 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...

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Transient 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,...

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how 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...

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question 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?...

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Cathode 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!

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Overpotential 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 -...

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CPU 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...

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Two 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....

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How 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...

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Increasing 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...

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Modelling 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...

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Boundary 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...

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PN 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...

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Li-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...

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Error 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...

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Adding 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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