Can a ferromagnetic conductor under high impulse magnetic field be treated as...
I conducted a simulation about a iron cylinder under high impulse magnetic field (peak magnitude is about 3T, and lasting time is about 10 millisecond). As we know that the magnet is fabricated under...
View ArticleDisplacement computation
hi, i hv designed a nanotube based pressure sensor, am getting some displacement values for pressure applied on nanotube boundaries but how can i know whether the result i am getting is right or...
View Articlemagnetohydrodynamic model
Hello. I learned that the latest version of Comsol-u is magnetohydrodynamic model. He was someone kind enough to send me this model? Thank you.
View ArticleEigen frequency analysis
hi, i am dealing with a nanotube sensor...can i use eigen frequency study step to find frequency at which displacement is maximum or should i use some other study step..
View ArticleHow to define Function in Definitions / Variables.
I'm currently working on electrical simulation using AC/DC module. I define nonlinear electric conductivity for zinc oxide material using following function(ZnO) in subdomain settings, but it shown...
View ArticleMesh continuity at boundaries
Hello, I'm starting with Comsol, and I have this question, that may sound really basic to many of you. I have defined a contact pair between two parts of my geometry - an assembly. Now I would like to...
View Articlesimply supported beam
Hi, How do i define the constraints for a simply supported reinforced concrete beam which has both truss and solid mechanics elements. Do I use boundary conditions or edge conditions
View ArticleUndefined value found // Hyperelastic parameters
Here we go again: When it comes to solving im getting anther error wich is quite frustrating. It says: Undefined value found. Detail: Undefined value found in. The equation-residial-vektor. There are...
View ArticleComb drive resonator in COMSOL
Hi, I need to use COMSOL to simulate a comb drive as a resonator. I used poly-Si for the comb drive and covered it by air. I assume that I need to choose Electromechanics Physics for my model. It...
View ArticleSetting up a previously solved physics as an initial condition for a second...
I am new to COMSOL 4.3a and I have what seems to be a simple dilemma, but I can't figure it out. I have a model incorporating three different physics. I want to run COMSOL to solve for the first...
View Articleparticle tracing module
Is there anyway to control the particle position in the inlet condition with number? example, x = 50-950um (50um apart) y= 5300um z=-50um thanks,
View ArticlePulse Volt vs Time
Does anyone has any idea where and how can I insert a time factor into the simulation? Let says I want the voltage to rise from 0 to 2V (within 40ns) --> stays at 2V for another 100ns --> falls...
View Articleresults
how can i plot a line graph of load against deflection at the mid point for a 3D beam
View ArticleLarge Eddy Simulation
hello I want to use Large Eddy Simulation on comsol but I can't found it. Can you help how to do this. thanks a lot
View Articlesimulate the electric field and potential distribution
Hi I am using AC/DC module to simulate the electric field and potential distribution over a high voltage composite insulator. when applying AC input voltage. I got the electric field distribution E...
View Articlehow to resolve error? The smoothing zone must be smaller than half the width.
The smoothing zone must be smaller than half the width. Thanks for hints.
View ArticleHelmholtz PDE for Acoustic scattering
I´m traying to use the General PDE- Helmholtz equation to solve an acoustic scattering problem, I know I can use the Acoustic Module, but i want to do it with the general PDE as this give me a little...
View ArticleRadiation model
Hi, I am starting to use Comsol and have problems making a simple model. It consists on a heat source ( rectangle for example) and a thin sheet of aluminum where I want to see how the temperature...
View ArticleVariable length of the boundary load
Dear all, I have a simple 2D model, that is a cantilever beam. I would apply on this beam a boundary load, but the LENGTH of the boundary load should change over time (increasing or decreasing). Just...
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