About conductive electrodes of piezoceramics layers
Hello everyone, I am working on a piezoelectric energy harvester(substructure and a piezoceramic layer). I am applying a point force on the substructure and measuring the voltage from the surface of...
View ArticleThe relative error is greater than the relative tolerance..Error!!!
Iam a newbie to comsol. And Iam learning comsol for my research. I simulated my first simulation and I got the below mentioned errors. Failed to find a solution. The relative error (4.6e+004) is...
View Articleharmonic perturbation
I have a question about harmonic perturbation I assigned a 1 A current to a cylinder in mf physics using multi-turn coil and solved it with a 60Hz frequency using frequency domain. If I assign 0.1 A to...
View ArticleForced Vibration of Vertical Simply Supported Beam with 'Overhang'
Hi, I'm trying to simulate the forced vibration of a beam that stands vertical and is supported by two simple supports that are shaken back and forth by a motor as in the attached schematic. I've also...
View ArticleGrain Modeling
In ComSol 4.2 how can we give different crystal to different grains Please suggest any method , as I am able to change crystal orientation of whole model but not of each boundary unit separately....
View ArticleProperties and funkction of model
Hey. Could someone explain what it is used commands are listed in the Annex to this post? They can be used? And where can I find the documentation for this command? Thank you.
View ArticleBeginner needs help.
I am new in Comsol and having a bit of problem. I am trying to make a simple 3D model of an electromagnet with core of nonlinear material. It is standard, cylindrical shape electromagnet. I have...
View ArticleEvaluation License
I wish to try on "Pipe Flow Module" and for that I want an initial evaluation license. Can anyone help me out how to get it? The main problem is that I should try hands on that module and than ask my...
View ArticleRunning the simulation for the required time span in more than one times (loops)
Dear sir, My requirement is "Running the simulation for the required time span in more than one times (loops)". I actually do not know the initial values of temperatures of the room that I am going to...
View ArticleCathode and Anode
Hello everybody! I'm creating a plasma with a Inductively coupled plasma and laminar flow interface. I want to put the electrodes (anode and cathode) in the model (within the device) and apply voltage...
View ArticleVibrating horizontal plate.
Good Evening everyone, I have a really simple question, I'm sure someone knows the answer to my problem. I'm trying to make a model of a plate, platform, anything you want to call it, that vibrates...
View Articledesign of one port resonator
I want to design a one port resonator . Please help me in designing the model. Thanks in advance
View Article4 Point Bending of a Multi-Layer Bar with simultaneous phase transformations
Hello all, I have been trying to simulate a 4-point bending test of a multi-layer bar with a geometrically simple 2-d model on COMSOL 4.3a. For the better understanding of the case, The bar consists of...
View ArticleHow can I export my Modell as S Parameter in touchstone Format ???
Hello memebers. I try to export my simulation with comsol 4.3 as S parameters in touchstone Format can Any one tell me how ?
View ArticleSplit Ring Resonator!!!
Hi all, Iam trying to design a Split Ring Resonator(a spiral ) for my project. Iam struggling with it, as iam very new to comsol. Can any one help me how to start with it. To add more it has to have a...
View ArticleCompressible and transient flow problem
Hi, I am trying to model a tank full of air that empties with time through a thin channel (It is almost a nozzle). I used the laminar-transient formulation. I chose from the library the properties of...
View ArticleHow to define Neumann boundary condition?
Hi, Any body help me regarding Neumann boundary condition shown in this paper. I suppose this problem has been solved in comsol 3.5 by seelecke and presented in boston - 2008 conference. But i am...
View ArticleInverse heat transfer problem
Hello, I need to determine the surface temperature by doing an inverse heat transfer problem method. Experiments are done with impingement of a hot steel plate(900°C) with 3 thermocouples located at...
View ArticleOne boundary with two boundary conditions (Neumann and Dirichlet)
Please help me to understand about this issue. I have a system of two PDE equations with two variables (u1, u2) need to be solved in General Form. On a boundary 1, for example, I set up a Neumann...
View ArticleHow to Improve Convergence in Natural Convection
I am wondering how I can improve convergence in my natural convection model. It is a simple model; an isothermal aluminum plate in water. The model starts out fine but as the run continues (transient...
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