Clik here to view.
PML 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 ArticleClik here to view.
Transport of concentrated species, Membrane gas separation
I've attached simplified model describing transport of the one component through membrane. I've made it simple to make you catch a problem easily. In my advanced model I'm using Laminar Flow physics...
View ArticleClik here to view.
Simulation 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 ArticleClik here to view.
Importing Solidworks and Meshing
Hello, I am fairly new to COMSOL, but am wondering if there is a quick way to import a 3D model from solidworks, let's say a valve, and be able to generate the "empty" space within the valve, which...
View ArticleClik here to view.
How to apply harmonic and random vibration's load?
Hello, I want to know how to apply harmonic and random vibration 's load in comsol v4.2, my previous operation is that first, apply a boundary load, then give a range of frequency, am I right? or...
View ArticleClik here to view.
Induced charge on a surface by a charged object at different relative positions
Hello, I am new in COMSOL and I was wondering if anyone could five me any idea. I want to simulate the evolution of the induced charge on a surface as the relative position to a charged object varies,...
View ArticleClik here to view.
Electric potential boundary on thin structure
Hi! My model contains a thin film with a thickness of 30 nm. I have applied different potentials and grounds on the thin boundaries of this film without any problems, but now I'm trying to apply these...
View ArticleClik here to view.
Transport of concentrated species, Membrane gas separation
I've attached simplified model describing transport of the one component through membrane. I've made it simple to make you catch a problem easily. In my advanced model I'm using Laminar Flow physics...
View ArticleClik here to view.
Flow between parallel plates
Hey, I am trying to model flow between 2 parallel plates both of which are moving towards each other. The equations applicable are Continuity and Navier Stokes. However, I am quite not able to find the...
View ArticleClik here to view.
rf mems switch design (comsol 4.2a)
HeLLO, i'm working on designing a switch that should work on rf range. I'm able to draw 2d structure in work plane but still not able to fix one side of the cantilver beam. i hve following questions,...
View ArticleClik here to view.
out 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 ArticleClik here to view.
contact 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 ArticleClik here to view.
dispalcement calculation???
hi, i am designing a pressure sensor......i have got displacement of 0.28nm for applied pressure say 10000 pa...how can i know whether it's correct or not... how are pressure n displacement related to...
View ArticleClik here to view.
Weak 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 ArticleClik here to view.
Internal 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 ArticleClik here to view.
PML 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 ArticleClik here to view.
Simulation 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 ArticleClik here to view.
Importing Solidworks and Meshing
Hello, I am fairly new to COMSOL, but am wondering if there is a quick way to import a 3D model from solidworks, let's say a valve, and be able to generate the "empty" space within the valve, which...
View ArticleClik here to view.
Electric potential at t=0
Hi, I was surprised to find that when my model is plotted at t=0, the electric potential that I apply appears. I was assuming that at t=0, V =0. My initial value for V is zero. This does not seem...
View ArticleClik here to view.
voltage and current
sir,I am working on a in built model of Rotating Machinery 3D motor and actuator but i could cot get the output (voltage or current ) and neither input it provided. how I can get this ?
View Article