Could I use a COMSOL eigenfrequency mode result as initial value of a time...
I want to calculate strain energy of a system, say a single beam, with deformation being coupling of two modes. Taking single beam system with dimension 1*1*100 um as an example, set the two ends of...
View ArticleInjection of velocity fluctuations inside the computational domain
Dear all, Currently getting started with COMSOL, I am trying to carry out a simple simulation to learn how to use the software, but I seem to get stuck somewhere in the process. The present problem...
View ArticleHelp with symmetry conditions and parameterizing a surface
Hello COMSOL helpers, I am having two problems with my model--one concerning utilizing symmetry conditions, and the other being parameterizing a surface for an optimization study. Symmetry: I intend on...
View ArticleBoundary for wave equation
Hello everybody, Do you have an idea about how can i define a "wall boundary" in pde solving module of comsol ? I'm doing acoustic without the acoustic module to better understand what's going on (i'm...
View ArticleAny Acoustics experts in the Greater Vancouver (British Columbia, Canada) or...
Hello, We are looking for Acoustics COMSOL experts in the Greater Vancouver (British Columbia, Canada) or Pacific Northwest area. If yes, please contact me at FirstName.LastNameATgmailDOTcom Thanks, Rahul
View ArticleActive Noise Cancellation system in car
Hi everyone, I'm a Student at UOIT, Oshawa, Ontario. My Project is Active Noise Cancellation system. My objective is to make the ANC system more effective as this system is not efficient for Multiple...
View Articlesimulate a stand wave tube
hi, everyone. I am new to comsol. I want to make a simulation of measurement of absorption coefficients in standing wave tube; here are my problem I encountered： I don't how to add a plane sound wave...
View ArticleAcoustic transmission
Hello everybody, I'm trying to simulate pressure (sound) transmission between two sides of air domain in the COMSOL transient pressure acoustic module. These two domains are cut by a metal sheet and i...
View ArticleFloquet type periodic boundary conditions in piezoelectric module
Hi! I am now trying to calculate acoustic waves in a periodic structure, so I need to apply Floquet type periodic boundary conditions. I added the predefined piezoelectric devices module and it shows 2...
View Article"Include Geometric Nonlinearity" for Membrane
Greetings, I read through the manual for Membrane node and found that "Include Geometric Nonlinearity" is necessary to be checked in the Study Step. This is to include the prestress specified in...
View ArticleSimulation problem back-scattering amplitudes ultrasound with Ray Acoustics
To investigate pressure amplitudes of ultrasound (f=2 MHz) scattered back from a water-filled balloon in an unlimited water space, I built a simulation model with the Ray Acoustics physics node (see...
View Articlecould anyone can help me to draw a spherical cap
i want to study the sound radiation from a spherical cap. and i need to get the regular meshes at the surface of the spherical cap, thanks a lot for the person who gives help to me.
View Articlestanding wave
hi all, does anybody know how to generate a standing wave in comsol? thanks hamid
View ArticleApproach in modelling diffuse sound field excitation
Greetings, I am interested in modelling sound transmission loss of a partition held between a reverberation chamber and an anechoic chamber. Ideally, considering incident sound wave, the source side...
View ArticlePressure Acoustics (acpr) Boundary Velocity condition
Hi all, I am trying to set a boundary in motion with velocity, but the only boundary physics in this module I can find is normal acceleration, which does not give me correct results. I have also tried...
View Articleaccoustic lens
hi guys i am just about to finish my degree and i am working on a project in which i am trying to acquire a acoustic image using accoustic len and a matrix of microphones. now i am trying to run a...
View Articlespring mass system on plate
hello I want to model the spring mass system on plate use Acoustic-Structure Interaction when I model, can I draw a rectangular layer and setting it as steel then on the rectangular top surface ,I draw...
View Articlephononic crystal
i have a 2d phononic crystal composed of water squares embeded in a PZT-5H material, and iwant to calculate the band structure and transmission. What modules can i use for these problem?? Thanks
View ArticleToneburst signal
hello, How could I create a toneburst exitation signal or a simple sinus exitation wave signal in comsol 3.5a? Thanks
View ArticleAcoustic dispersion relationship of a metamaterial with losses
Hello, I'm trying to derive acoustic dispersion relationship considering losses in the unit cell. I manage to do it in the lossless case solving for the eigenvalue problem with a Floquet-Bloch...
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