Resonant Transducer Damping with Acoustic Load
Hello, I am trying to understand the effect of mechanical load on the resonant characteristics of a piezoelectric transducer. For that I basically take a rod of PZT-5H. I applied a voltage difference...
View ArticleAcoutics Module
I am trying to model a sound source (speaker, just a "power point source" now) in a sphere and prove that the sound is concetrated in the center of the sphere. Then I want to add sound treatment to the...
View ArticleAcoustic Levitation Simulation
Hi There is a tutorial model of "Acoustic Levitation" on the website, simulating the levitation using particle tracing for fluid flow. I want to simulate the levitation of a sphere (of diameter close...
View ArticleSide operator evaluated on edge not adjacent to given boundary number
Hi, I am currently working on acoustic-shell interaction problem and I came across a following error: "Side operator evaluated on edge not adjacent to given boundary number". Could anyone explain me...
View ArticleDispersion diagram
I want to find the dispersion diagram for a periodic cell in Acoustics using Bloch-floquet boundary condition in new version of comsol. As I could not find any manual for this case I searched for the...
View Articlesaw RFID
I am working on SAW RFID tag and i cant able to get the plot of reflection coefficient vs frequency and also that of time response . Anyone please help me
View ArticleAcoustic S Parameters Calculation
I am having some difficulty in calculating the acoustic S parameters in COMSOL 4.2a. 1) What parameter should be measured to calculate the S Parameters? Should it be the acoustic pressure [Pascals] or...
View ArticleAcoustic S Parameters Calculation
Hi, I have a very beginner-level doubt regarding the understanding of S Parameters- If we are to take the scattered sound pressure values, they have a real and imaginary part, i.e they are in the form...
View ArticleAcoustic S Parameters Calculation
Hi, I am trying to obtain the variation of the refractive index(n) and impedance (Z) for a unit cell of a periodic structure. For this, I am using the Pressure Acoustics, Frequency Domain module in...
View ArticleCoupling plate and acoustics
Hi everyone, I'm trying to model a axisymmetric disk in 2D which is actuated with 40kHz in the middle in axial direction which gives a pressure wave in the surrounding air. The air is represented by an...
View ArticleAcoustic properties of a ventilation duct
I am trying to model a ventilation duct to try and and understand what happens to sound within a duct and when it exits the duct into a room. I am trying to look at the sound pressure variation and...
View Articlesilencer duct
Hi I want to simulate insertion loss for ventilation ducts. I need to define inlet and outlet pressure so i can calculate insertion loss by its difference. There is a similar sample "perforated...
View ArticlePhysics Coefficient PDE - "Re"build thermoacoustics module
Hey there, I am using the physics module to rebuild the 3 differential equations of the thermoacoustic module (please see attached). In the physics module I am using the coefficient form PDE (3D). In...
View ArticleLinear elastic material
Hi, I implied two linear solid mechanic (linear elastic material) in two rectangular(( Rectangular1)and rectangular2 ) ), there is a common inner boundary( number 2) between these two rectangular, i...
View ArticleAcoustic-Structure Interaction
Hi, I'm trying to solve a time-dependent Acoustic-Structure problem that consist in a acoustic pressure applied in the inlet of a tube as a boundary condition, in the outlet of this tube I applied a...
View ArticleAcoustic band gap of phononic crystals
Dear Nagi Elabassi, I am a final year undergraduate student at the Indian Institute of Technology, Bombay. I was going through the thread www.comsol.co.in/community/forums/general/thread/950/#p2516. I...
View ArticleAcoustic band gap of phononic crystals
Dear Sean, I am a final year undergraduate student at the Indian Institute of Technology, Bombay. I was going through the thread www.comsol.co.in/community/forums/general/thread/950/#p2516. I have been...
View Articlekerr effect
Dear cchriste thanks allot for these informations, i am trying to simulate a silicon waveguide: brillouin scattering, but really i do not know how to find the scattered field inside the waveguide,...
View ArticlePlotting unwrapped phase
I am plotting the phase response of a loudspeaker, and I want to unwrap it (like what the Matlab command unwrap() does)www.mathworks.com/help/techdoc/ref/unwrap.html Any ideas?
View Articleacoustics
Dear sir, i am using acoustics equations are writing in Matlab. i need some help from you. In same equation are introduce in comsol and also avilable for matlab programs are introduce in comsol. give...
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