Clik here to view.
How can I switch solutions in a plot quickly? with short command
Hi I have a mode analysis with lots of modes (50-100 solutions) and I want to find the right one by looking through them. Is there a way to switch the solution no in the plot quicker than to select the...
View ArticleClik here to view.
Einzel lens problem
Hello I am currently working with a cluster source, in which we are trying to focus a beam of charged clusters using an einzel lens in vacuum. As a help I am trying to use comsol to model how the focus...
View ArticleClik here to view.
How to get the value in the 'Arrow Surface'
Hello, I use the 'Arrow Surface' to scale my variable and the result is good. BUT HOW I can get the specific value of my variable ? I want to get the value in the position of every arrow tail. THANKS!
View ArticleClik here to view.
Can a cable be modelled in COMSOL
I want to know whether we can model a cable in comsol or not? I want to model a coaxial cable so whether can be made here?
View ArticleClik here to view.
Transport of diluted species physics for diffusion through two layers
Hi, I have two layers of diffusive material, each having different diffusion co-efficient. There is a concentration gradient between bottom and top layer. So, i know the top and lower concentration for...
View ArticleClik here to view.
joule heating
im new to comsol and my work is to design a heating element by applying electric potential and it is time dependent,,according to my model,heat should dissipiate in ceryain marts,i have used kanthal...
View ArticleClik here to view.
Understanding the Convergence Plot, and 'Undefined Value in Equation Residual...
Hi guys, 1. I'm simulating a chemical reaction with 3 different physics, 2 transport with diluted species, and 1 coefficient form PDE, with flux term of 1 reaction species across. When I click on the...
View ArticleClik here to view.
Partition Imported Geometry
I'm trying to partition a geometry that I've imported from Solidworks. I've introduced a workplane and drawn a rectangle where I wish to split the geometry to obtain different domains. After this I...
View ArticleClik here to view.
Modelling a Flow across a boundary
Hi guys, I'm dealing with a flow across a boundary problem, as visualized in the picture below. The geometry consists of 2 rectangles, 1 for each zone. Both use Transport of Diluted Species. One of the...
View ArticleClik here to view.
How can we determine magnetic field of a current carrying wire with finite...
Hi dear all users How can we determine magnetic field of a current carrying wire with finite length, and how it is possible to simulate it in time dependent domain in COMSOL. To simulate and obtain the...
View ArticleClik here to view.
Geometry related parameter sweep
In my COMSOL model ,I have two geometry related parameters. I want to sweep them together. The fisrt parameter has 45 numbers and the second has 60 numbers.But I found that COMSOL would not work for...
View ArticleClik here to view.
diffrence is only supported for solids
Dear All, can any body help me in this error in Comsol 4.3? I got this error when I want to extrude some objects. The 3D geometry was the result of revolving a 2D asymmetric object that I want to make...
View ArticleClik here to view.
Fiber Model in 3D Analysis
Assalamualaikum. I am Redwan Ahmad. I am trying to analyse a fiber model in 3D format in Comsol Multiphysics 4.4 for investigation of longitudinal properties. But I am facing some problem, as follow...
View ArticleClik here to view.
surface charge density - RF module
Hello everyone, I am a little bit confused and I would be grateful for your help regarding the calculation of surface charge density on a gold nanoparticle in glass in comsol (RF module). Here is how I...
View ArticleClik here to view.
Magnetic force on magnetic particle by permanent magnet
Hello everyone, I am completely new to comsol. And these days I am trying to use comsol to simulate the magnetic force on iron oxide magnetic particle by permanent magnet. In theory, the magnetization...
View ArticleClik here to view.
Model the flow of a visco-elastic material
Hello, I'm currently working on a model and i can't seem to tackle a few problems. If you would be so kind to help me out, I would be entirely grateful. The model is a 2D section of the real 3D...
View ArticleClik here to view.
Prescribed displacement and pressure
Hi I'm a student and one of COMSOL user. I have problem to apllied pressure (1500Pa) at my structure after prescribed displacement (0.1um). Because the plane by applying the prescribed displacement is...
View ArticleClik here to view.
COMSOL 4.4 cannot replicate a COMSOL 3.5 Model
Hi guys, I refer to this model: www.comsol.com/model/fixed-bed...ytic-hydrocarbon-oxidation-257 This model was created in 3.5a. I loaded it in a COMSOL 4.4 version. Two physics came out; Transport of...
View ArticleClik here to view.
Hello, Ivar Kjelberg, help please
Dear Ivar I have attached my model so you can see it. My probe is coaxial cable excited from one port with microwave signal. the other end of the coaxial cable will go up to two layers (samples) the...
View ArticleClik here to view.
temperature dependent time
Hello Im new in COMSOL I have a 2D model for solidification where i like to put following baundaries for the temperature dependent on the time: T(t)=533-0.03*t (kelvin) temperature = 533 Kelvin cooling...
View Article