Sunday, January 1, 2017

fluid dynamics - Liquid analog of the Black Hole (Part 2)


Similar question has been asked but did no get good answers.


We know that black hole can confine light, but can we create an ocean black hole - which can confine surface water waves or sound waves in water?


Definition:



  • What is a static water flow which can CONFINE water waves?

  • Is there a configuration confining only surface waves?


  • Is there a configuration confining volume waves?


Description:


Inside a confined region any water density perturbations can not propagate outside.


PS:



  • Overall volume of water in the "tank" can not change so the solution when the water is removed faster then the waves travel is ruled out.

  • There possibly can be additional objects presented in the water "tank".

  • It can be some unsual liquid or gas, whith additional "new" properties.



Thanks for your answers.




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