Modeling Acoustic Emission in a simple surface
Can COMSOL model the propagation of Acoustic Emission waves (E and F modes) on a simple surface when a pencil lead break occurs? For example a pencil lead break on the surface of a small aluminum...
View ArticleThe power transmission is bigger than 1???
I use the Acoustic module and calculate the power transmission properties in periodic strucutres. In some simulations, I found the power transmission is bigger than 1. I'm so cofused about it. The...
View ArticleRadially Poled Piezoelectric Cylinder
Hi, I am working on a problem with a radially poled hollow piezoelectric cylinder. I have successfully built this model in 2D axi but would like to also have a 3D model that works. Both models (so far)...
View ArticleTime Dependent Analysis of two Coupled Membranes
Hi everyone! I am very new to comsol, so I apologize in advance if my problem is trivial. I have to perform an acoustical simulation with comsol 4.2a. My system is made of two elastic circular...
View ArticleMultiphysics: RF Electromagnetic Waves under the influence of Magnetic Field...
Hi, I have a multiphysics problem. I can't figure out how to combine the two physics. What I want to do is to solve RF EM waves (eigenfrequency) for a certain geometry (I prefer to use a torus...
View ArticleRigid Boundary Condition on a vibrating membrane
Hi all, I am working with a elastic circular membrane (acoustic-shell interaction): I would like to set a little "slice" of my membrane to be rigid. this means that, when the membrane vibrates, this...
View Articlerelation between two sudy
hi all, i created a model of piezoelectric device in piezoelectric module,now i want to transfer it to electromagnetic wave module because i need S parameters(that aren't in piezoelectric answers)but...
View ArticleEvaluatig Noise Reduction and Insertion Loss
Hello, everyone. I'm trying to evaluate Noise Reduction and Insertion Loss for open-end tube onto acoustics fields. fortunately, I did calcalate Transmission Loss successfully. Because setting the...
View Articlemodify equation
hello in wave eq module there is the equation ea.utt= f + c.grad^2 (u) It is possible to assign values and variables to that "f" in the equation for example f=1 or f=t (that is f = time) I wonder how...
View Articleabout PML
Hi, Have you fixed your problem? I meet the same problem with you on adding PML. I try different kinds of ways but it doesn't work. Hope to get some help from you. Regards, -- zhanggazi
View ArticleReading external data
I want to apply a waveform for whom the data was collected experimentally. So no mathematically derived equation. How can I apply this to a Comsol model?
View ArticleCOMSOL capabilities question
How could COMSOL be used to help me in the design of a MEMs acoustics pressure sensor?
View ArticleMultiplication of two outputs as input
Hi, I am solving a pressure acoustics(acpr) model coupled with Navier-Stokes model for a rectangular channel. As an output from pressure acoustics, I should get the pressure as well as the velocity...
View Articlefinite volume, volume of fluid, boundary integral method
Hello, I'm trying to model a cavitation air-bubble in water under ultrasound waves. For that I need to use a Boundary integral method to solve the Laplace equation. The finite element method I try to...
View ArticleTime Integral in Frequency Domain
Dear All, I have got a simple geometry: a 1mm thick piston-disc is vibrating with a frequency of 1kHz at 1cm above the closed bottom of a (L=353mm long, Rc=38mm radius) cylinder. The maximum...
View ArticleHow to consider the damping losses in SAW devices, in order to obtain the...
Hello, I am trying to model a Surface acoustic wave device using Comsol 4.1. I want to obtain the real and imaginary part of Y11 impedance so I can further process it. So far, I was able to obtain the...
View ArticleModeling Acoustic Metamaterial
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 Articlemodelling of air in transient analysis
Hi, I am using pressure acoustic and AC-DC Modules together. In time-harmonic analysis it can be possible to model PML and infinite elements, however it is impossible in transient case. To check the...
View ArticleGaussian Distribution of Particle Diameter for Particle Tracing
Comsol Version: 4.2a Hello, I am looking to simulate how particles would behave due to acoustic forces in a standing wave field. I have simulated a 5 node standing wave field by positioning two...
View ArticleSolid Vibration
Hi, I'm a bit new on this and I really don`t know if what I'm trying to do is possible. I have a solid in wich there are two membranes in the middle, the objective of this part is that by a vibration...
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