HOW TO OPTIMIZE DISPERSION OF AN ACOUSTIC HORN MODEL IN 3D
I was able perform a simulation based model 2d using as reference the file in the list of tutorials (horn shape optimization), but I can not do this on a model imported from solidoworks in 3d. My horn...
View ArticleAcoustic materials - integrate in the
Hi, i have a problem with the material library. I make some acoustic simulations with absorbing materials. There is the possibility to use the Delany & Bazley model in the acoustic module but in...
View ArticlePoroelastic waves - acoustic module - material definition
Hi, I would like to model a poroelastic material with the acoustic module. However, can you tell me how I can link my parameters to material proporties. My parameters are : - porosity - tortuosity -...
View ArticleIdentifying the eigenfrequencies of a shell sphere
Hello, I am new to Comsol and I was asked to identify the eigenfrequencies of a hollow sphere of 100um diam. and about 3 um thickness. I started by using 2d axisymmetric analysis->solid mechanics...
View Articlebuilding piezo ring projector (electroacoustic transducer)
Hello, I plan to build piezo ring projector, but I don't decide to build it as 2d axis symmetry or entire 3d model. My electrodes would be located circumferentially. 2d model would be problem because...
View ArticleCacluate power exchanged between solid/fluid and solid/solid
Dear all, I've solved a coupled linear elasto-acoustic model using COMSOL's Acoustic-Solid Interaction module. During the post-processing I would like to calculate energy balances to better analyze the...
View Articleintensity in acoustic
Re: Hi when you start with COMSOL try to use only 1 physics at the time, test yourmodel physics by physics, once you have got the 3 fundamental physics working alone (with fixed values for the...
View ArticleHelp me: Optimization the pressure!!
Greetings, Thanks for reading my problem. I have some problem about setting the optimization module. My model is simple, In Acoustic Physic, I use an acoustic lens to converge the pressure at the focal...
View ArticlePZT/piezo material properties
Hi, I am working in version 4.3a structural mechanics module with Piezoelectric Material Model. I am a little confused about which material properties are which in the matrix. The input field for the...
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 ArticleA boundary problem on wave equation in a 2D fluid
I use PDE( coefficient) to solve a problem, here is the simplified model: It's a 2D problem. I want to solve wave equation in fluid. There is a square area (water in it), and an imaginary, smaller...
View ArticleTotal Stress Tensor
Hi I am trying to calculate Total Stress Tensor in a fluid.i know that: Total Stress = -pI+Shear Stress(or viscous stress) I want to know what this pressure is in this equation for moving fluids...
View ArticleSimple supported boundary condition in Comsol
Hi, guys. I'm actually studying cylindrical sound diffusers using Comsol 4.3a and I need to add simply supported boundary conditions. Is there any way to do it? I have noticed there's several...
View ArticleSound Absorption Coefficient of Materials
Does anyone know how to simulate the "Sound Absorption Coefficient" of materials? I tried to build a waveguide (impedance tube) on top of the materials, but it doesn't work for high frequency.
View ArticleBaw Resonator Problem
Hi I am working on a baw resonator. For our simulation we have considered a 3.5a COMSOL 2D model of Thin Film Bulk Acoustic Wave Resonator in the model archives of COMSOL. So we treid to simulate the...
View Articlehow to simulate the return loss (S11) of Quartz Crystal Mcrobalance
I am trying to use comsol for simulating the reflection loss (S11) of QCM. My question is since the QCM is one port acoustic wave sensor, how to determine the input and output?
View ArticleHow to extract solid deformation of a time point in a transient process and...
Hello, My aim is to make a simulation to observe the change of the optical phase on a optical fiber's outlet in a cycle of sound pressure. And I have a question as follow: In file.A, I use transient...
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 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 ArticleComsol issue on Linux
We had a simulation computing for about 3 weeks and paused it to quickly analyse some results. We created a graph and then Comsol stopped responding. It uses 100% of one of the CPU on our Linux...
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