Is it possible to model MAGNETOSTRICTIVE materials in comsol, just like for...
Dear colleagues, In comsol, there are predefined models for the piezoelectric materials. For magnetostrictive materials, they have similar properties as the piezoelectric counterparts. However, a...
View ArticleTransient Pressure acoustics study-plotting shear waves and longitudonal...
Dear All, I had made a Transient pressure acoustics study and used Electrostatics physics to generate acoustic pressure waves in air and its transfer to a solid material cube block. I used Electric...
View Articlephononic crystal -- Acoustic Structure Interaction
hello, i'm computing the phononic crystal band structure using the Acoustic Structure Interaction modal, and the PC is 2D square lattice and the unit cell is a circle in a square area. the problem is...
View Articlehow to interface a piezoelectric device with an electrical circuit ?
I'm just discovering COMSOL. I have built a FEM model for a piezoelectric device and could successfully compute its electrical impedance, etc.. Now I want to drive this piezoelectric device through an...
View ArticleGeneral questions about Transient Acoustics and Solid Interaction
Hello fellow Comsol users, I would very much like to ask a few relatively simple questions regarding transient acoustic models with some regarding transient solid interaction. In essence my models are...
View ArticleVibrationg structure in fluid
Hello Everyone, This is my first project with Comsol so I have no clue about what I am doing really. My questions are most likely very simple/stupid I'm sure anyone here can help me. What I want to do...
View ArticleAcoustic Module: Plane wave radiation and sound soft boundary
I would be thankful if you answer the following queries regarding acoustic module. 1. For a time dependent analysis in acoustic module, there is a boundary condition “Plane wave radiation” under...
View Articleeigenmodes of an acoustic shoebox using BEM in COMSOL
Hi all, Has anyone ever coded a BEM formulation for the eigen frequencies and eigen modes of a shoe box ? I'm trying, but it doesn't seem to be that easy... Basically, I want to solve _only on the...
View ArticleHow to give input acoustic pressure to the inlet of a Helmholtz resonator to...
Hi I am verifying the acoustic pressure inside a Helmholtz resonator of thickness 0.5cm with a neck of length 3cm, radius 1.3cm and cavity of radius 6cm, length 30cm. How to give an input sound...
View ArticleSolid and Fluid motion with eigenfrequency study
Hello, I made a very simple geometry in 2D, such as the cross-section of a microcapillary. I want to find some eigenfrequency which can make a few modes on a microcapillary. So, for the shell I used...
View ArticleAC voltage source in frequency linear perturbation
Hi, In the loudspeaker model, there are three physical fields:solid,magnetic and acousitic and two study steps:stationary and frequency domain-linear perturbation. i add a short-circiut ring in the...
View ArticleSPL vs. Freq for thin film loudspeaker
I simulated a thin film piezoelectric loudspeaker and I plotted the SPL vs. Freq. the Sound pressure looks fine till about 15000 Hz. But at any supplied voltage, always after 15 KHz, the SPL falls to...
View Articleprestressed analysis for elastic waves propagation in time domain.
Hi, I'm trying to simulate Lamb Wave propagation in a hollow cylinder filled and surrounded by water. I'd like to model the influence of static intraluminar pressure. I've tried background pressure and...
View ArticleSeparation of particles using ultrasonic standing waves
Can anybody help me and give me tips on how to model: 1. Acoustic wave field 2. Eular-model particle movement in the standing wave 3. Standing wave
View ArticleData from excel (Acoustic model)
I need a help to use information from excel. Using the tool interpolation I took data from excel and generate a graphic from this function. Now I am trying to use this information to excited my model....
View Articleacoustic pressure controls airflow simulation
Hi everyone, I have a tough time to simulate airflow is controlled by acoustic pressure, would you want to help me? :) the detail is 1) I have finished simulation about acoustic pressure in a meshed...
View ArticleAcoustic presure field intensity
Hi, I'm working on acoustics module in comsol 4.4 version. For a given input pressure I need to obtain the pressure field intensity in the air gaps between the slit gratings( in-between the blocks)....
View ArticleProblem of shift Two-port Piezoelectric SAW Device from Time-domain to...
Dear ALL, I download the Two-port Piezoelectric SAW Device example from website. But after i change the model from time-domain to frequency domain. I can't get the correct results. The displacement are...
View ArticleSound absorption coefficient for perforated panel.
Hello, everyone. I have a problem that I don’t really know. I ‘m trying to evaluate the absorption coefficient for perforated panel into impedance tube. So, I made some simulation of cylinder impedance...
View ArticleDissipation density equation in pressure acoustics fluid model
Hi guys, I'm trying to figure out what the equation of dissipation density in pressure acoustics fluid model. Originally, dissipation function is related to spatial derivative of velocity. I used the...
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