Out of Memory although using more RAM
Hej there, I ran a rarefied gas flow model (transitional flow) on my 16GB RAM machine. I build a 2D model with a D2Q36 quadrature and it runs on my machine. As I want to use an larger quadrature which...
View Articlequestion : loudspeaker driver 3D model
Hi, Sorry for my bad English. I'm studying library sample loudspeaker driver(comsol 4.3b). I want to analysis it by changing 2D model into 3D. I used the same Model libary of the BCs(Boundary...
View ArticleHow-to : Transmission Spectra vs Wavelength
Hi I had attached the concept of my simulation as picture where you can understand my idea. For obtaining Wavelength vs Transmission spectra I need to include all Refractive index (n and K values of...
View ArticleHow to extract wall shear stress of a turbulence flow?
Hej, I modeled a 3D turbulent flow, but I didn't find the expression of wall shear stress? Is there any one knowing how to extract the wall shear stress in COMSOL? Thank you
View ArticleSimple questions using the acoustics module
Hello fellow Comsol users, I have what for anyone with some experience in acoustics will probably be able to answer in seconds! I would like to calculate the Sound Power radiated by a vibrating object...
View Articlegraphical data representation
Is there a possibility in 4.3a version, to get some kind of section through, for example magnetic field images in selected time steps? I mean, like it was made in the picture in attachment.
View ArticleElectric field distribution - Point Source
I want to simulate the Vertical and Horizontal polarization of dipole source. Its Au-GaAs-Air structure with electric dipole source. You can find that in attachment. For this we need to import n and k...
View Articlecoupling two-phase laminar and turbulent model
Hi I'm new to COMSOL and I would like to build a model for my experiment. Based on the simulation result, I believe I need to use two phase laminar model to run the simulation in the beginning and let...
View Articlecoupling two-phase laminar and turbulent model
Hi I'm new to COMSOL and I would like to build a model for my experiment. Based on the simulation result, I believe I need to use two phase laminar model to run the simulation in the beginning and let...
View ArticleA SMALL DOUBT ON PORT POWER VALUE !
Hi all, I am new to this software and I am trying to simulate a multi-layer structure on which plane electromagnetic wave is allowed to fall at normal incidence. I kept the port power at the default...
View ArticleNanoindentation Model Troubles
Good Evening Everyone, I am trying to Model a nanoindentation on a metallic film located on a polymer substrate. I would like to observe the resulting displacement of the metal as the nanoindentor...
View ArticleCoupling Thermoelectromechanical problems
Hi All I want to coupled three things, thermal +structural + electrical problems and solve them all together not separately. Any idea how to do it in COMSOL. I ave attached the coupled equations. Thanks,
View ArticleEigenvalue problem with Dirichlet Boundary condition
Hi all, I am a newbie of comsol and try to solve eigenvalue problem in a finite region using the PDE module. When I try to impose Dirichlet boundary condition, it seems not working. The...
View ArticleElectrical Circuit, Pulse source
Hello Comsol users, I want to model a simple electrical network. But the voltage source is modeled as a pulse source. And I have big problems with the solver. Any idea how the solver has to be set? I...
View ArticleVariable modifications between solution iterations
I'm developing a transient model using the Livelink interface. The model first calculates an initial solution for the first time window, then I would like to modify the state variable values due to...
View ArticleI can't open 4.2 models with 4.1 !
I developed a model in 4.2 and later tried to open it in 4.1 but I get the following error:"Model created with a later version of COMSOL Multiphysics"
View ArticleGetting derived values into matlab variables
Hello! I have some trouble getting the value of an average operator into a matlab variable when using comsol through matlab. What I get when I translate the model into an .m file is this:...
View ArticleInitial conditions (problem) - Fluid Structure Interaction
Hello, I am working with the FSI module and I am trying to simulate the pumping phenomena in a micropump, by means of a moving plate. I have successfully obtained results for certain design parameters...
View Articlejacobian error
Hi all, I am running more than one model in the same file, separately. I do it because in one model I need the results of another model. I tried to refer to a solution typing, for example mod1.mf.Bx....
View ArticleHow to extract phase information on S parameters?
Is there a predefined post processor to obtain phase of S parameters in RF simulation?
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