How to define variable regard to time dependent steps?
Hello All I'm running a time dependent AC/DC model, The conductivity of material must be changed regards to voltage differences on two coordinate in each step . I wonder How can I define a variable or...
View ArticleSimualtion 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 ArticleDeformation 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 Article1D 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 ArticleGetting 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 ArticleStep 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 ArticleState 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 Articlephotonic 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 ArticleMicroweave 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 Articleimport 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 ArticleMultiphysics 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 ArticleMultiphysics 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 ArticleTransport 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 ArticleThermal 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 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 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 ArticleMicrowave 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 ArticleHow 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 Articlecone 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