Modeling An Ultrasound Transducer

- February 25, 2022 at 1:23 am
  
  Mahyar92
  Subscriber
  
  Hi everyone,
  I need to model a capacitive micromachined ultrasound transducer (CMUT) in ANSYS workbench. Basically, a CMUT is a clamped membrane which is electrically actuated to generate ultrasound to the fluid medium to which it is coupled. CMUTs are first biased with DC voltage, and then actuated with an AC signal to have dynamic motion.
- February 28, 2022 at 3:06 am
  
  peteroznewman
  Subscriber
  
  Does the fluid need to flow, or is it sufficient that the ultrasonic pressure waves travel through the fluid medium?
  Perhaps you can use Harmonic Acoustics to solve for the harmonic pressure in the fluid medium.
  In that way, you don't need Fluent at all.
- February 28, 2022 at 3:56 am
  
  Mahyar92
  Subscriber
  
  Hi Peter Thanks for your reply. To my understanding, Harmonic Acoustics won't take the damping effect of the fluid medium on the membrane into account. I did some search online and found out that apparently system coupling is not supported for Harmonic Analysis. So, I will perform a transient analysis instead to see how it works...
- March 16, 2023 at 4:57 am
  
  Hassan.liaquat
  Subscriber
  
  Hi Mahyar
  
  Can you please guide me on what worked for you? I am also trying to simulate a US transducer in a fluid to focus wave onto a tissue.
- March 16, 2023 at 8:20 am
  
  ErKo
  Ansys Employee
  
  HI
  We can do that using the coupled field harmonic system in Workbench - you can have structural, piezo, and acoustic regions together there.
  
  See example td-53 in the help manual.
  
  All the best
  Erik