Finding deflection and blocking force of Ionic polymer metal composite beam...
Dear Sir, I am trying to find deflection and blocking force of IPMC beam in 3D and 2D but couldn't able to do so.Can you please send me the analysis file since i am very new in COMSOL. Regards, Sami
View ArticleSyntax for gradient
Hello everyone I am building a model that has gradient of dependent variables in the source term. The syntax for any dependent variable 'u' is 'ux'. But, my source term has terms like gradient(u*v). (...
View Articleelectrostatic force time dependent
Hello, sorry for the simple question - I'm quite new to COMSOL - and hopefully you can quickly help me out. I'm trying to calculate electrostatic forces using the stress Tensor in a 2D Geometry....
View ArticlePull-in voltage of resonator in 2D - keep getting inverted mesh elements
Hi, I'm trying to find the pull-in voltage of a beam in 2D, essentially exactly as is done in the "Pull-in Voltage for a Biased Resonator-2D" model in the application gallery. The only differences are...
View ArticleHow to give a parabolic velocity profile at inlet?
I am solving a steady state problem, I need to give a parabolic velocity profile at inlet. How to do that?
View ArticleCANNOT MODELING HEAT TRANSFERT
Hello community! I am francophone and I studying in Cameroon, MASTER RECHERCHE in mechanic. I want to use comsol Multiphysics to model heat transfert in brake drum of a car but it is very difficult for...
View ArticleGas flow simulation
Hi, I am a rookie in comsol multiphysics and i need a little help with my model.... I have a chamber with dimensions 1m*1m*0.005m (x,y,z). I'm using a work plane to minimize the ram geometry.is that...
View ArticleCatalysis
Hello! I would like to know how to turn the catalyst (any material present) used into a powder in order to get the right calculations. and How to turn the bulk materials in the libraries into small...
View ArticleOutlet boundary condition: Outflow
Comsol has three type of BC for outlet of a fluid flow. Pressure, Laminar outflow and velocity. I want to give a outflow condition. Since I don't know the valocity (it has to be resolved), I can give a...
View ArticleMass conservation
have a 2D fluid flow model with a flow through porous media. There is one inlet with 20 mm/s inlet velocity and I assume conservation of mass. I want to check that the numerical mass balance of the...
View ArticleCannot find mli directory for livelink for matlab setup
Hi, I'm trying to run a Matlab file that someone else made in COMSOL 4.3 but when I try to run mphstart it gives me the error, undefined function or variable mphstart. I had a look at the setup...
View ArticleElectrospinning_doc file attached
Dear Administrator/anyone in discussion form, I have attached the doc file for electrospinning simulation. I am unable to get correct result. Would you help me with this? I am using a single needle and...
View ArticleFailed to find consistent initial values.
Hi. I coose frekvenci transient study and get thise error. Failed to find consistent initial values. Last time step is not converged. THANK
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Magnetocaloric effect
Dear all, I am currently working on my bachelor project, which involves the numerical analysis of the magnetocaloric effect (MCE). For those of you who are not familiar with this effect: When a...
View ArticleRotating a static boundary load in the frequency domain
I am having problems with trying to create a rotating boundary load in the frequency domain. I have a time domain model which works, but takes quite a long time to run. In the time domain model: I...
View Articleinclude parametric sweep of stationary in time dependent study
Hi, I am a beginner in Comsol. In a stationary study I simulate electric fields for different voltages in a given geometry using the parametric sweep option. After that I include the stationary study...
View ArticleNon-symmetric electrical field/potential given symmetric model?
Hi All, I'm a beginner so please bear with me! I'm trying to simulate an electric field within a symmetric model, but my field keeps coming up as not symmetric. It's a base with an initial voltage...
View ArticleExporting the results of a parametric sweep in separate files
Good day, My question is rather easy to pose, but I can't seem to figure out how it is done. What I have is a parametric sweep over N parameter values. I want to then export these via Results ->...
View ArticleFloating Potential
I have a question about floating potential condition. I have 2 metals (like electrodes) which are not directly connected to voltage source and i want to use them to measure the signal (or voltage...
View ArticleMagnetic Insulation not applying correctly
Hi everyone, I'm working on a figure-8 coil model that is widely used in medical treatment for neural diseases. I have successfully modeled the kind of coil I wanted and created a boundary volume...
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