Divergence VS Dimensions
Good Morning, I performed different simulations of flat coils to see the magnetic flux density without any error and results look reasonable. The problem is that when I reduce the size of the flat coil...
View Articlea few question about using COMSOL
Hello, everyone, I have a few questions to ask for your help,thanks in advance! 1. how to view the cross section of a 3D model? I wan to cut the model into two part and see the inside. 2. For the 1D...
View Articleerror meassages
Hi Mads, I wish you could assist me with this error I am getting, when run the poroelastic wave model: The following feature has encountered a problem: Parameter list gives empty sweep - Feature:...
View ArticleIs there some interface or boundary required to couple electromechanical and...
Hi everyone I want to simulate a vibrating plant, and have a look at the pressure in air domain. Is there some interface or boundary required to couple electromechanical and acoustic pressure modules?
View ArticleThe pressure of the boundary probe is 0 ??
Hi everyone I simulate a vibrating membrane(or plate), I want to observe the pressure which is generated by the vibrating plate in the air. I set the boundary load in electromachenics and normal...
View Articleliquid mixing using ultrasound (acoustic module)
Hi and good day for you I'm new in Comsol, my question is, can I simulate the mixing of two immiscible liquid by means of ultrasound wave(20KHz and 500W)? how? for example we have a small vessel (1...
View ArticleRegarding Thermoacoustics
Dear All, I m new user to comsol Multiphysics.. I am studying Thermo-acoustis of tissues in a waveguide in Comsol 4.2..As a heat source i am usimng microwave(i.e. Electromagnetic wave(emw)) for my...
View ArticleComputing the kinetic energy
Hi there, When trying to compute the kinetic energy I am getting the following error message: Failed to evaluate variable. - Variable: material.rho - Geometry: 1 - Domain: 2 Failed to evaluate...
View ArticleLoudspeaker Modelling
Hi, I have a simple cabinet with a port on the front face. I then have half a sphere normal to the front face acting as the air domain. Firstly, how can I look at the modes inside the cabinet? Using...
View ArticleTransurethral Focused ultrasound models
Has any one come across Comsol models on transurethral focused ultrasound applications? If so I could use some help. So far I have looked at other acoustic models which are similar but not quite like...
View ArticleAcoustic Band Structure in 2d
Hi Folks - Ive posted a couple of questions to some related discussion but it looks like they haven't been visited in a while so I thought I would make a new discussion group. I am interested in...
View Articlesolver problem
Hello I have a problem with a simulation. I want to work on coda wave propagation. I think the problem condition and the mesh is correct but when I calculate after few hours I receive a message on the...
View ArticleEnforcing Sound hard boundary condition for interior boundaries - Acoustics...
Hi, Is it possible to enforce sound hard boundary condition on an interior boundary for a Pressure acoustics model? I can only find the sound soft boundary condition along with continuity and pressure.
View ArticleDesign of CMUT
Hai Saurabh, This is Sri. I hope you are doing good. I've been trying to design a Capacitive Micromachined Ultrasonic Transducer (CMUT) in comsol v4.3 But i'm unsuccessful. I've already designed many...
View ArticleEigenfrequency Error "Cannot evaluate expression"
I am trying to compute the Eigenfrequency physics for a mesh I created and imported into COMSOL. The mesh is 3D, complex, and asymmetrical but I have had no problems computing with it in other studies....
View ArticleMeasure the vibrations on the walls of a tank
Hi I am trying to build a cylinder with thickness 1.25mm and send an sinusoidal wave to it and plot the frequency response on the wall of the cylinder to the original frequency response. Kindly help me...
View ArticleFar Field Sound Pressure Level Plot
Hi there, I was using COMSOL 4.3 to imitate the tonpilz transducer design that is easily accessible on the Internet. However, in the results, the far field sound pressure level plot generated...
View ArticleAbout optical force calculation of particles manipulated by microring resonator
Hi,everyone. I want to simulate a structure which includes two bus waveguides and one microring resonator to form an on-chip optical tweezer. One microparticle is placed in the gap area between one...
View ArticleHow to find what "compute differential" documentation
When I am plotting a Nyquist plot, I came across this option "Compute differential" under "Expression evaluated for:" option. I just don't know what this means. But instead of asking what it is, I want...
View ArticlePiezoelectric Study of waveguide
Hello. I have made a model of lithium niobate waveguide cladded with silicon dioxide. As lithium niobate is a piezoelectric material I intend to check the inverse piezoeffect caused by my input signal...
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