Acoustic Cavitation Bubble

- November 19, 2018 at 11:45 pm
  
  sherifrashwan247
  Subscriber
  
  How I can define bubbles in the geometry domain?
  
  How i can simulate the acoustic cavitation bubble?
- November 20, 2018 at 4:21 am
  
  Keyur Kanade
  Ansys Employee
  
  You may want to look at following
  
  https://www.youtube.com/watch?v=8tRjQRErey8
- November 20, 2018 at 4:28 pm
  
  sherifrashwan247
  Subscriber
  
  @kkanade
  
  Thank you very much for the video, my question is that: should i define a spherical bubble in the geometry or it should be created on its own through simulation?
  
  Yours Sincerely,
  
  Sherif
- November 21, 2018 at 5:52 am
  
  Keyur Kanade
  Ansys Employee
  
  You can define bubble dia in Fluent. No need to create it in geometry.
- December 17, 2018 at 5:06 pm
  
  sherifrashwan247
  Subscriber
  
  The goal is to model cavitation generated using a horn that vibrates in a bath of liquid and calculate the maximum collapse pressure produced.
  
  I dont know how to enable the acoustic model and how to specify the boundary conditions?
  
  The geometry is very simple 2D with one side oscillating by a certain frequency? should i apply the same model in the video while enabling the acoustic model as well? what do you kindly recommend?
- December 17, 2018 at 5:18 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  You will need to go 3d, use high resolution mesh of LES or better quality to get a well resolved pressure field to accurately describe cavitation and use a scheme to track the interface.
- December 17, 2018 at 5:23 pm
  
  sherifrashwan247
  Subscriber
  
  hi Sir, thanks do you have a sort of steps to follow to setup the model please?
  
  Yours Sincerely,
  
  Sherif
- December 17, 2018 at 5:30 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  You might find some scientific papers dealing with it. You will see that some them are just using URANS approaches which might be considered as first step for very detailed analysis
- December 17, 2018 at 5:35 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  CFD Modeling of Low, Medium and High Frequency Ultrasound Waves Propagation Inside a Liquid Medium as example. Good luck
- December 17, 2018 at 5:49 pm
  
  sherifrashwan247
  Subscriber
  
  Is that a publication? Can you please attach the link because i can not find it online?
  
  Yours Sincerely,
  
  Sherif
- December 17, 2018 at 5:55 pm
  
  sherifrashwan247
  Subscriber
  
  how to specify a free surface boundary condition? Is that a wall or something different?
- December 17, 2018 at 6:47 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  Free slip wall as general simplification.
- December 17, 2018 at 6:49 pm
  
  Amine Ben Hadj Ali
  Ansys Employee
  
  Yes publication. I do not share papers here.