Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Transmission in acoustics module
Posted 21 déc. 2015, 16:57 UTC−5 0 Replies
Please login with a confirmed email address before reporting spam
I did a simple model in COMSOL to check the influence of matching layer. So I modelled a piezo (PZT-5H), matching layer (Quartz 1978-IEEE) , which is then followed by a bone. So according to theory at lamda/4 matching thickness and matching impedance of sqrt(Zp*Zbone) I should get 100% transmission in the bone or absolute pressure in the bone should be equal to the absolute of the incident pressure.
The problem is I am not getting 100% instead I am getting only 47%. Does anybody know why it is happening? Or I am doing something wrong, since I am fairly new in COMSOL
Few details about the model:
I am exciting a plane wave with frequency of 500 KHz ( Frequency domain model) and did a parametric sweep for matching thickness width ( To see its influence). Model is ended with a well-designed PML ( scaling factor to be 15 and curvature factor be 3), that means very high absorption. Boundaries of the model are symmetric.
Hello Shreyank Gupta
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.