2way FSI simulation - deformation of pipe due to sinusoidal flow ...
Hello, I'm going to model a simple artery , here is the model definition: =========== Model data =========== A cylindrical artery with 10mm radius, 1mm thickness and 80mm length is considered with...
View ArticleTracking position of isothermal or general contour curve in 1D plot
Hi everyone, I have very simple model where copper plate is heated by a pulsed laser (transient study, 2D, see file surfaceplot_1). Now, I am searching for a way to track the position/depth of my...
View ArticleDeflection of a fixed prestressed MEMS membrane
Hello, I am a new Comsol user and I have a problem with a simulation of a multilayer mems membrane. The simulation results are different form the experimental data. The geometry is a circular 'plate'...
View Articleoptical properties versus chemical composition
Dear All, I want to know how Comsol can predict the optical properties of materials versus chemical composition? does Comsol have this capability? If yes, which Madule I have to use. Thank you very...
View ArticleRadiation Heat transfer
Hi, I am trying to do a simple model of radiation but I am having a few problems. It consists just in a lamp heating a piece formed for 3 diferent materials. I am not sure how to modelate the lamp, I...
View Articlebugs in modeling instructions for Corrosion module in comsol v 4.3b
Hi, everybody! I'm new. I'm practicing an example about corrosion science, and I find some bugs in modeling instructions for Oil Platform. You can find it in PDF Document of Corrosion Module——Tutorial...
View ArticleLarge mesh with Beam Envelopes module
Dear all, probably I'm missing something about the use of the Electromagnetic Waves, Beam Envelopes; as I understand well, this module can be used to simulate a long waveguide (some mm or cm long) but...
View ArticleHow to Export the material data to .mphtxt file?
I am trying to export the data from Comsol. I could get the mesh data if I click the 'mesh export'. But I also need the material data for each mesh cell (tetrahedron). Since I cannot link the Comsol...
View ArticleSimulation of Van der Waals forces using Comsol v4.3
I'm trying to simulate the attractive Van der Waals force between two nanometric structures. My initial idea was to integrate the Lennard-Jones potential created by one domain (\integral...
View Articleion motion in DC plasma
Hej there, I have a problem with the DC discharge plasma. I need to simulate a plasma in a tube with a gas flow. The plasma is generated through some decay reaction in the tube (in reality due to...
View ArticleCalculated resistance of a multi turn coil in frequency domain is too high
Dear all, I hope anybody in this forum had the same experience with the multi turn coil domain. In my model i have a simple multi-turn-coil domain. My problem is that the resistance calculated in...
View ArticleBoundary Conditions for Z-Axis in a 2D Simulation (Solid Mechanics)
Hi, I'm having difficulty figuring out how to set desired boundary conditions for the Z-axis in a 2D solid mechanics simulation. I would like my model to be infinite along the Z-axis with a fixed...
View ArticleCOMSOL keeps closing
Hi I have an urgent problem concerning COMSOL. I am using modes such as "weakly-compressible navier stokes" and PDE modes, and I realise for some models I cannot open; the COMSOL will load and then...
View ArticleHow to set user defined boundary condition
I'm now trying to calculate heterojunction. As an example of model library， I use the "Transport of Diluted species" model to calculate. But I want to set a condition that " log(n1)+c1=log(n2)+c2" at...
View ArticleHow to define BC ?
HI, I am doing a 3D electromagnetic simulation. I am using magnetic field physics interface. We have here the magnetic insulation boundary condition (default). But I also want to use an 'electric...
View ArticleDefine a Mixed (cauthy) boundary condition for Richards Equation(subsurface...
I read some paper, in the old version of COMSOL, we can choose a Mixed boundary condition (mix of Dirichlet, Newman and Cauchy conditions). in order to automatically transfer the boundary condition...
View ArticlePlasma nitrogen
Hello. Does anyone have data for the simulation of plasma ICP for nitrogen? Thank you.
View ArticleMoving surface charge - pzd model
Hello I tried to build a simple test model of an oscillating surface with an applied surface charge (with pzd model). The solution shows that the surface oscillates correctly (displacement plot). But...
View ArticleThermal structure interaction
Hello, I was watching one of the webinars and was trying to build a model similar to the following: www.comsol.com/video/thermal-s...eraction-mems-energy-harvester I have set up the model but I can't...
View Article3D Joule heating model: failed to converge
Hi, I am trying to simulate the joule heating of Chromium, and to the heating of Silicon Nitride layer that is covering the Chromium metal. When I compute the model, the error message is 'Returned...
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