Baw 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 ArticleNeed help in output acoustic pressure in air domain
Hello,everyone I used Pressure acoustic, frequency domain and electromechanics Physics, 2D-axisymmetric to simulate a vibration membrane to get the output pressure in the water domain. The result is...
View ArticleHow to do a Coupling a structure to a fluid domain using pairs
Dear all, My question is very simple: I try to realize a coupling between a fluid and a structure using identity pairs. My geomtry fail to be imported using the union, and I want to work with the...
View Articletime varying sea surface scattering
Hi, I am very new at COMSOL. I have a simple problem but i guess it can be hard to implement in COMSOL. I am working in 2D domain. I want to model plane wave (can I create it for a finite duration?)...
View ArticleIsentropic system in aeroacoustic branch
Hi everyone! I wanted to ask, how you can include isentropy in the Linearized Euler Frequency Interface of the Aeroacoustic Branch? Thanks for your help! Christoph
View ArticleAngular pressure in acoustic module
If I have a plane rectangular membrane say 2mm X 1mm and I want to apply an angular pressure only on the left half of the membrane in acoustic module, how to i do that? Do I need to write an expression...
View ArticlePartial differential terms in Monopole source term
Hi, I am trying to solve an acoustic problem, in which the monopole source term contains the partial differential terms. I tried using d(p,z), but I would like to know if d(p,z) accounts for total...
View ArticleFrequency domain study - changing the force on a point load with frequency
Hi, I'm having some trouble finding out how to apply a frequency-dependant force. I have a model where up until now, I've been using a non-varying force of 1N on a point load, then performing the...
View ArticleError during multiphsics
Hi.. We are try to design saw delay line gas sensor, during the simulation we got error as- Fail to find destination boundaries or destination selection empty please help us to sort out this error. --...
View ArticlePlane Wave Radiation in Transient Analysis
Hello Dear Friends, I want to simulate a simple model via transient analysis. My model is similar to "porous_absorber.mph" (4.3b). My model is more simple. Fundamental difference between two models is...
View ArticleModeling elastic waves in a solid mechanics study
Hi, I'd like to ask a question concerning the modeling of elastic waves in the structural mechanics module. The geometry is a simple 3D beam, free on all sides. (file attached) My goal is to study the...
View ArticleCoupling Optical Modes and Elastic Modes
Hello, I am trying to find the effects of elastic modes (vibrations) on optical modes in a SMF28 optical fiber in 2D. I am using the solid mechanics model to first calculate the eigenfrequencies of the...
View ArticleSEISMIC METAMATERIAL
I want to do simulation on "seismic metamaterial" in COMSOL mutiphysics. Can any one help me regarding this and whether it is possible in COMSOL? If yes, then in which module..
View ArticleChange axis of symmetry in 2D axisymmetric models
When using 2D axisymmetric models, is there a way to change the horizontal axis to the axis of symmetry, instead of the vertical axis?
View ArticleComplex Band Strucutre - Acoustics/Structural Mechanics
Hi In a typical phononic band structure calculation done within COMSOL the procedure is to define Floquet BC's and do a parametric sweep of the wave vector over a particular direction in the...
View ArticlePiezoelectric sensor
Hi I am new to COMSOL and I am trying to use Piezoelectric module in Structural mechanics for sensing. So on input displacement there is an output voltage. I am not sure how to proceed. If someone can...
View ArticlePiezoelectric sensor
I am trying to model a sensor made using a cylindrically polarized ring of PZT, using the acoustics module. I am applying a background pressure field and want to measure the voltage produced on the...
View ArticleSimulate an electrode
Hi, can someone please explain to me how I can simulate an electrode. I want to simulate a piece of piezoelectric that is grounded on one side, and has an electrode to measure the electric potential...
View ArticleMass density and bulk modulus
Hi, I want to model an 2D acoustic metamaterial in Comsol. My target is to apply acoustic waves along one side of the geometry and calculate the wave amplitude from opposite face of the geometry. I...
View ArticleHow to calculate the acoustic modes by RF module in COMSOL ?
We can calculate the optical modes by RF module in COMSOL . But I did not know how to calculate the acoustic modes which is produced by Brillouin scattering. ?Would you please give me more detailed...
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