Drift Diffusion and Heavy species transport coupling
Hello I am modelling an AC-DBD plasma actuator (model is attached). I have modeled my time-dependent ac circuit and have proceeded to include the drift diffusion model and heavy species transport...
View ArticleCOMSOL for an element developed in MATLAB
Hi everyone, What is the best way of using COMSOL as solver and for preprocessor (creating the model and meshing) for an element developed in MATLAB? Is it even possible to have a user-defined element...
View ArticleERROR - MESH SIZE
Good night, I am having an error starting a simulation of piezoacoustic model of a sonar with a mesh size of water domain for maximum analysis frequency of 100 kHz :"Failed to find a solution for the...
View Articleinverted mesh element near coordinate
Hi dear IVar I want to see the mechanical changes due to flow of current through two parallel wires in COMSOL. To do this, first I used two "magnetic field" and "solid mechanic" modules. After getting...
View ArticleAcoustic far field plot error
Hello ! I saw your question on the COMSOL forums and although there are no answers over there for your problem, I was wondering if you managed to solve the problem yourself. I too am having exactly the...
View ArticleLoop a coupled in-out time dependent closed system
Yeah, the subject is a bit cryptic. My system is more or less an external mixed vessel (CSTR) and a tubular reactor (PFR) feeded by the vessel and that discharge in the vessel. For this reason my...
View ArticleCoefficient of isotropic diffusion in icp_torch model
Hello, I have one question to the developers of icp_torch model of PLasma module- Equlibrium discharges. What does mean the isotropic diffusion coefficient in this model in main laminar flow settings...
View ArticleSimmetry in COMSOL MF
Hello, I am modelling an electromagnet. The geometry is pretty big and I would like to reduce computation time using some simmetry. For example along the y direction (which is also the direction of the...
View ArticleRequest for Help
Hello Fuwei, I am using COMSOL to solve coupled PDEs. I wanted to know if you have any example that you have solved using the coefficient form PDE, in which there were two or more dependent variables....
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 ArticleNonlocal terms
Good morning. I am an italian PhD student in Mathematical Models for engineering. I tried a free trial copy of Comsol and I have a question. Is it possibile to put a boundary term which is made of a...
View ArticleUpdate variable at the end of each timestep
Hello everyone, I was wondering if there is a solution for updating variable at the end of each timestep without using LiveLink for MATLAB. For example, if I want to modify the parameter A, at the end...
View ArticleTransferring Parametric Sweep Solutions Between Studies
Hello, Does anyone know if it's possible to transfer solutions from one study using a parametric sweep to another study using an identical parametric sweep? For example, I would like to use a...
View ArticleHow to plot the relative error?
I've just spent more than a whole day troubleshooting my model. However, if I could plot the relative error over the geometry, I believe it would have been solved in minutes. There was a problem...
View ArticleCyclic Dependencies in an AR coating
Hi all, I am currently working on modeling an antireflection coating by building a model based off of the Plasmonic Wire Grating tutorial. I have attached the model, so I'll skip over the particulars...
View ArticleFrequency-transient Electromagnetic Heat Source & Heat Transfer with Phase...
I have created a coupled multiphysics model which refuses to solve. The model consists of a 2D periodic domain containing an EM wave incident onto a surface which uses the 'Heat Transfer with Phase...
View ArticleCalculate overlap between two different models ( so 2 different studies)
Dear All, I am trying to calculate an overlap between two optical modes (2D), while sweeping a parameter in each model. For example lets imagine you want to calculate the overlap between two different...
View Articleultrasonic testing of steel by normal probe- wall echo
Hi, I am trying to simulate ultrasonic testing of steel by normal probe. A 2D model was built. The probe is defined as Lead Zirconate Titanate(PZT-5H) and generates a sine wave to the steel. Is there...
View ArticleHow can I use the variables in solid mechanics module as an input without...
Hi, Recently, I want to consider the pressure induced temperature increase in solid mechanics module. This temperature will cause the thermal expansion. So in the thermal expansion part, the...
View ArticleIs this a cpu problem?
My system has windows 7 ultimate x64, intel i7, 32GB of RAM, no graphic card. I made my simulation using my system and could solve my simulation over one hours. There was a problem with my computer, it...
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