Young's Modulus of Multilayer Cantilever
Hey! I am working on a multi stack cantilever. Any body tell me how can I calculate Young's Modulus of Multilayer cantilever? I am using 5 layers i.e. Si, SiO2,Al,ZnO,Al. Please Help.
View ArticleTime dependent pulse ultrasound wave
Hi, I have a time-dependent model to simulate ultrasound wave distribution. My pulse function is "sin(2*pi*10^6*t)-step1(t[1/s])*sin(2*pi*10^6*t)" from t=0 to 0.001 and step function is 0 to 1 at...
View ArticleHow to calculate photonic band gap, transmission and reflection spectra?
We want to get photonic band gap, transmission and reflection spectra of 1D or 2D PC. Could you help me how can I obtain band gap and Transmission/Reflection spectra of 1D or 2D photonic crystal? Or...
View ArticlePN optical modulator
Hello, I am a student in TUD and I have started to work with COMSOL. My task is to model and simulate PN silicon optical modulator. I am using Semiconductor module. I have couple of questions I would...
View ArticleAir water interface
Hi friends, I want to solve the "Separation through electrocoalescence" in the model library but with air as a continuum phase. When I changed the material from oil to Air, the similar solver could not...
View ArticleHow to create a point source and a receiver in an underwater model
Hi, I am a beginner with COMSOL 5.2 and am using it to optimize the design of an Acoustic Vector Sensor based on P-U principle. However, to go ahead with that, I need to create a point source of sound...
View ArticleThermoacoustics using COMSOL Multiphysics
Is therer anyone who solve thermoacoustics problems using COMSOL? Please let me know if you have any opinion......
View ArticleWater air interface in acoustic modulus
Hello, I am a beginner in Comsol. I want to model ultrasound wave propagation in water. In my domain, I have a solid domain too and the whole computational domain is surrounded by air. I want to know...
View ArticleRelative permittivity and coupling matrix
Hello, I am new to Comsol. I want to model a piezoelectric transducer. Comsol is asking for coupling matrix and relative permittivity. Could anyone give me some information on what are these...
View ArticleUltrasound transduce output
I like to model an ultrasound transducer as shown in the attached figure. I have all material properties from the manufacturer. I want to have 4 highlighted part in my Comsol model. -For the backing...
View ArticleSound absorber
Hello, I want to model a sound absorber that will be able to absorb ultrasound. Does anybody have any idea how can I model this in the acoustic module of COMSOL? Thanks,
View Articlepiezo electric transducer
hey ,i'm doing engineering.And i have been working on an idea which involves piezo electric transducers. And i have a few doubts: 1. does the charge get stored on the surface of the transducer or not?...
View ArticleHow is Dirichlet boundary conditions implemented in Comsol?
So I'm building a model with the Acoustics Module trying to model a piezoelectric disc, and when documenting the model the question of how the Dirichlet boundary conditions like voltage on either...
View ArticleHow to transfer "eigenfrequency" from eigenfrequency to frequency domain step
Hi, I am trying to simulate acoustic levitation, including both mechanics and acoustics. Simulation consists of two parts - structural mechanics and piezoelectrics, where eigenfrequency step is used to...
View ArticleAbsolute pressure in water is smaller than expected.
Hello, I am modeling a PMUT idealised as a circular membrane that consist of AlN in between two Al electrodes. I am interested in the maximum pressure difference at a distance of the PMUT, when the...
View ArticleHow do you plot error in COMSOL Multiphysics V5.2?
While doing the simulation in COMSOL Multiphysics V5.2, I found that there were errors being plotted (for my case, it was from Convergence plot 1 and 2 I think). I would like to get this graphs for my...
View ArticleNegative Decibel Levels in Results
Hello, I am running an acoustic analysis on a high frequency horn for a school project but my results are strange. It shows that as the air moves through the horn, the decibel levels quickly drop and...
View ArticleWhy the COMSOL results can not give infinity values at resonance?
Dear all, I am now stuck in a problem about the acoustic pressure distribution inside a long duct with a monopole source in the cubic center. Considering one-dimension wave propagation problems, when...
View Articlehow to build an ultrasound examination model in 4.4 version
Hello, all I'm definitely new to comsol. I want to build a 3D model which could be tested if there existe a fissure or not under ultrasound effet.But the tutorials i found in comsol blog all use 5.1 or...
View ArticleUltrasound perssure output
Hello, I am trying to reproduce a result from a paper (Please see figure 1). The first thing that I tried was a model that include only transducer and water. As you can see in Figure 2, I got some...
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