why does deformation remain same?????
hi, i have designed a pressure sensor... i am getting different displacement values as output but deformation for all applied pressure is same....why is it so??? wat should i do to get the deformation...
View Articleout of memory during LU factorization ?
I use comsol multiphysics 4.2 to solve a model on my computer(with 2GB RAM), I get the error "out of memory during LU factorization", but when I put the same model into another computer(the same cpu,...
View Articlecontact modeling and time dependent analysis
Hello all, I am trying to model a time-dependent vibration problem (resonant vibration) with contact and I am having trouble solving the model. The contact is between the shaker and the object. I want...
View ArticleEigenvalue analysis " Mass matrix is zero"
I am trying to run a Static Eigenvalue analysis of a structure . My model is a stone-building , so i just enter the properties of the material and the constraints . When i solve the problem appears the...
View ArticleScttering problem using comsol4.2
I wanted to calculate scattering absorption cross section and thereby extinction for a nanoparticle. I am not sure how to go for that in comsol4.2. Can anyone please tell a basic flow to accomplish...
View ArticleAbout creation of struturegeomerty
Hi...! I am a student of University of Pune,working on Rf MEMS Switch. I can't get how to create a structural geometry of cantilever beam in Com sol multiphysics. So please help me to create a...
View Articlethe free vibration of the cantilever
Hi everyone: The initial displacement D=1.05mm, is placed on the end of the cantilever beam, to solve the velocity response of the beam end. First, I select space dimension 2D, and add physics Beam,...
View ArticleWeak Form Modeling and Multiphysics Coupling in RF Module
Hello All, I have some problems when using user-defined weak form PDEs and multiphysics coupling for 3D nano particles scattering in the RF module. Please find the attachment for the detailed...
View ArticleInternal error in geometry decompositon: problem with just 2 elements in model!
Hi Everyone: I am trying to build a complicated 3-D model with many channels and such but I ran into a problem very early on. I just have one block attached to one hexaheadron. I am unable to form a...
View Articlegrating based coupler
Hi, I am trying to simulate a four port grating-based coupler (or filter) by comsol 3.5 but I have some problems : first : I used port condition for 4 ports that one of them is in-port but I don't know...
View Articlecoplanar waveguide cantilever rf mems switch
Hello everyone, I'm working on designing of coplanar waveguide cantilever beam rf mems switch. if anyone has successfully modelled this switch ,i request them to kindly help me out in modelling...
View ArticleRadiative thermal transfer
Hi Comsol users, I am solving a thermal stress problem and I actually have some questions regarding the radiative heat transfer model. So I am modelising the behaviour of a brick (the one used in...
View ArticleShape Memory Alloy behaviour
Hiiiiiii I am kanhaiya studying Master of technology .Could anyone please help how to implement Shape Memory Alloy behaviour in COMSOL. I am doing my project related to SMA . Thank you
View Articlemoving object with deformed mesh
Hello everybody, Is it possible to simulate an object moving from one point to another using deformed mesh? I am trying to simulate an object heated in a microwave oven using conveyor belt. Thank you...
View ArticleFrom PDE to linear algebraic equations. Algorithm of solver
Dear Sirs, please advise me with my deal. I simulated a model in ACDC->Electric currents. As I can see there are some differential equations which FEM approximates into a system of nonlinear or...
View Articlemphgetu
Hi all. I am using Comsol with Matlab (version 4.0) for a time-dependent analysis. I have to process many data (there can be 1000000 degrees of freedom). It takes a lot of time to save these data and...
View ArticlePML v4.0
Hi all. I would like to use the PML for a time-dependent analysis in the Structural Mechanics Module (version 4.0), but it doesn't look to work well. Can you help me to implement the PML in my model?...
View ArticleSimulation of a wireless power system
Hi, I am trying to simulate a wireless power system between two coils. The transmitting coil is connected parallel to a electric circuit consisting of a capacitor and a voltage source in parallel. I...
View Articlehow to model capacitive RF MEMS shunt switches
Halo..i need who can help me to model the capacitive RF MEMS shunt switches. i'm still new doing simulation by COMSOL 4.3
View Article3D waveguide, compute electromagnetic field
I want to view the electromagnetic field (in particular the norm of E) of 3D waveguide. I haven't experience in a 3D waveguide, I have simulate always a cross-section of waveguide. First of all I...
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