Quantcast
Channel: Latest Discussions - COMSOL Forums
Browsing all 25631 articles
Browse latest View live
↧

Merge two mesh

I want to merge 2 mesh. A cylinder with a slab. How can I do that?

View Article


Hi: need help on electro-rotation studies

Hi I work on electro-rotation studies through dielectrophoresis(DEP). Problem involves lot of variables, however I would like to know a way to obtain rotational simulation due to DEP? Currently we got...

View Article


Moving mesh 2D

Hello, I am trying to simulate the moving boundary for a 2D geometry. I started with a simple 2D geometry where 1 boundary is moving in the x-direction and 1 boundary in y-direction, but because the...

View Article

nimor loss coefficient

can i add minor loss coefficient (K) to to a boundary

View Article

Simualtion of Electrospraying using comsol

Hello How to find surface charge density during electrospraying?How to couple laminar two phase flow with electrostatics? Thanks Alok

View Article


Deformation in a Tire

Hi everyone, I am currently trying to model a tire going over a ledge and examining the stresses and deformation caused by the impact of the ledge with the tire. I am applying applying 5000 N of force...

View Article

1D plot

Hi I simulate the waveguide with mode analyses(2D) in x and y direction, now i want to plot 1D plot in z direction according to x and y how can i do that?

View Article

Getting capacitance from Impedance/admittance

Good day! I am modeling an impedance/capacitance sensor. I have a static model and the results are very promising, now Im trying to expand my model and model a frequency domain study: the voltage...

View Article


Step function

Very simple question, but I can't find out how to do it. I have a external temperature, "Temperature 1", which is 100 C. After 330 seconds I would like it to drop 80 degrees to 20 degrees. I should be...

View Article


Thermal expansion model

I am trying to examine the stress distribution in a SiO2 film coated on a thick Si sample with a small Al bump on it, all heated to 700 K. I thought I built the model correctly, but the resulting...

View Article

How to solve and verify a ODE equation?

How to solve a ODE equation with mathematical problem? And how can I verify the result correct with the mathematical answer? Thanks for help.

View Article

State Space Export

Hi , i have build a simple cantilever beam model using time depented model. after defining the points of forces and parameters, i want to export the model to matlb (State Space Matrices) so i could...

View Article

photonic crystal fiber

Hi , I am an electronic engineer doing master degree research about raman amplificaion by using photonic crystal fiber, I want to calculate the confinement lose by using PML around my fiber strucrutre,...

View Article


Microweave frequency function with temperature

Hi I am studying an microwave problem in frequency domain, where the frequency of the waveguide problem needs to change during the simulation. I successufly, made one simulation by definying a...

View Article

import mesh with the edited *.mphtxt file

Hi, everyone: I have a geometry mesh, and I knew the mesh node's coordinates: x, y, z in matlab workspace. I want to import the mesh into COMSOL , and set the point whose coordinates were knew as the...

View Article


Multiphysics how to make communication between different physics (same model?)

Hi I need to make a coupling between three physics: - MicrowaveHeating - Frequency Domain - Transient - Non-Isothermal Laminar Flow - Radiation Model My problem is that I required to use the same time...

View Article

Multiphysics Swirl Flow with Convection&Conduction problem

Hey all, so I am a beginner in Comsol. I designed a mixer in 2D axial symmetry and solved the problem with a given angular velocity w and found the stationary velocity field. Now let's say the mixers...

View Article


Microwave heating model with multiple frequencies

Hi, With the Microwave heating model, with a frequency-transient study is possible to simulate multiple frequencies in a well defined bandwidth? I have a input wave with a fixed bandwidth defined by a...

View Article

How to plot the relative error?

I've just spent more than a whole day troubleshooting my model. However, if I could plot the relative error over the geometry, I believe it would have been solved in minutes. There was a problem...

View Article

cone in liquid

hello I have two questions first, I want to swing the cone (oscillate) in a liquid medium so what you have to choose another model as solid Mechanics???? Secondly I will stay strictly close and the...

View Article
Browsing all 25631 articles
Browse latest View live