Elctromechanics Mode in v4.3
Hi, I am trying to understand this example, http://www.comsol.com/showroom/gallery/444/ The 3.5a version and 4.3 version look quite different. I have several questions about the 4.3 version that has...
View ArticleData Resolution Problem
Hi, When I plot my results using the 1D Plot Group, Point Graph, I get a jagged curve as opposed to a smooth one. (see attached file). I have tried changing the time step of the model (making it...
View Articlebeam vibration by a shaker
Hello, eneryone. I am doing a project simulating a simple beam structure vibrated by a shaker. The left end of the beam is fixed with the shaker. If I want to set the beam vibration acceleration at 10...
View ArticleOS X mountain lion (10.8)
Has anyone tested that Comsol 4.3 will work with Mac OS X Mountain Lion (10.8)?
View ArticleReading external data
I want to apply a waveform for whom the data was collected experimentally. So no mathematically derived equation. How can I apply this to a Comsol model?
View ArticleElectric field enhancement at the sepcific point, Comsol 4.2a, RF module
Dear All, I have question. I have one dipole (gold), and I done some calculations for scattered filed, in 400nm-1000nm spectrum etc. Now I want to check is there some electric field enhancement at some...
View ArticleRayleigh-Plesset bubble response
Hello everybody, I try to model an micro air bubble in water under an incident ultrasonic pressure field. In near future I hope to be able to add walls to the system, therefore I need a model which...
View ArticleNewton's bucket experiment
Dear reader, I am look to simulate Newton's bucket experiment. I am trying to simulate one cylindrical object of water. And have the wall rotate around the cylinders axes. This should excert a drag...
View ArticleFailed to find a solution: Singular MATRIX.
Hi, I am Patricia and I am a new Comsol user. I am modelling the cooling scenario of a low voltage AC drives.To simplify the calculations and to obtain easier results, I have carried out many...
View ArticleAbsorption and Scattering cross section
Dear Fellows, Is there any of you who has experience with creating absorption and scatering cross section for dipole antenna? So this is the story, there is gold dipole antenna on the glass. I want to...
View ArticleCreating an animation in 4.1
Hi, I would like to create an animation of the displacement of my piezoelectric transducer in function of the frequency response. Is there any way in COMSOL 4.1 to do so? Thanks in advance
View ArticleInfrared Heating of a semi-transparent material
I am simulating the reheating stage of the stretch blow moulding process. I need to model the oven which has the infrared heating lamps, which heats up the PET preform which is essentially...
View Articlea more realistic electron trajectory in a medium
Hi all, I want to simulate an electron trajectory in a silicon medium, however I need to take resistance, bouncing of the electrons with the atoms in the medium and energy dissipations etc. into...
View ArticleHow I can export the value (for exemple a Force) of a element and not of a...
I should export the Lorentz's forces, after a EM analysis. My interest is to have the value of the force for each element and not for each node or mesh point. Comsol must have the value of each element...
View ArticleSemiconductor diode example
Dear Comsol Users I'm trying to redo the semiconductor diode example. The model defines a piecewise Gaussian distribution function for the doping concentration, depending on the x- and y-coordinates. I...
View ArticleConnecting two cylindrical shells (pipes)
Hi all. I need to create a geometry that is essentially a T-shaped pipe joint. How do I do that in COMSOL, without having to resort to external CAD tools? I tried to intersect two cylinders but...
View ArticleUsing a boundary condition in an equation
Hi! I'm buildig a model in the "Transport of Concentrated Species" interface. The equation I'm using is Fick's law (time dependent). I have two species in the model, and I set up a flux boundary...
View Articlelooking for a way to save the modeling time
Hi, I am using the time-dependent physics and my 3D model is applied by a sinusoidal voltage. the modeling is running in one period T with 100 steps and it may done in 30 mins if I was lucky. but most...
View ArticleCalculating and plotting the fluid flux over a surface
Hello, I am modeling fluid flow in a network with a single input and multiple parallel outputs. The inlet is at a given pressure and the outlets are at zero pressure. I would like to calculate the...
View ArticleSimulate 3D cylinder disks using 2D-axisymmetric RF model
Hi all, Recently, i want to simulate the plasmonics resonace in 3D cylinder disks. I have already computed the geometries in 3D RF models, and now i want to use a 2D-axisymmetric RF model. I know that...
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