Surface impedance water layer in partially filled cavities

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SUMMARY

The discussion focuses on modeling the acoustic field in partially filled cavities, specifically using water as a sound-absorbing wall through surface impedance boundary conditions. Participants inquire about standard surface impedance models for water and explore whether water should be treated as a perfect reflector rather than an absorber. The consensus leans towards considering the negligible absorbance of water in this context, suggesting that modeling it as a perfect reflector may be more appropriate.

PREREQUISITES
  • Understanding of acoustic modeling principles
  • Familiarity with surface impedance boundary conditions
  • Knowledge of fluid dynamics, particularly in relation to sound propagation
  • Experience with numerical modeling tools for acoustics
NEXT STEPS
  • Research standard surface impedance models for fluids, focusing on water
  • Explore numerical methods for simulating acoustic fields in partially filled cavities
  • Investigate the properties of sound absorption in fluids and their implications for modeling
  • Learn about the application of perfect reflector models in acoustic simulations
USEFUL FOR

Acoustic engineers, researchers in fluid dynamics, and professionals involved in modeling sound behavior in partially filled cavities will benefit from this discussion.

Ilias Aouaj
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Hello guys!

I have to model the acouctic field within partially filled cavities.

So consider a rectangular or cylindrical cavity that is partially filled with water. I would like to model the water layer as a sound absorbing wall by prescribing it as a surface impedance boundary condition.

My problem is modelling the surface impedance of water. Are there any standard surface impedance models for fluids like water? Or how should I model the surface impedance for water?

I'm also open for any other suggestions in approaching the water layer as a sound absorbing wall.

Thanks for your answers!
 
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Ilias Aouaj said:
Hello guys!

I have to model the acouctic field within partially filled cavities.

So consider a rectangular or cylindrical cavity that is partially filled with water. I would like to model the water layer as a sound absorbing wall by prescribing it as a surface impedance boundary condition.

My problem is modelling the surface impedance of water. Are there any standard surface impedance models for fluids like water? Or how should I model the surface impedance for water?

I'm also open for any other suggestions in approaching the water layer as a sound absorbing wall.

Thanks for your answers!
I would guess that the water is intended to be a perfect reflector and not an absorber.
 
tech99 said:
I would guess that the water is intended to be a perfect reflector and not an absorber.
Do you think the absorbence is small to neglect?
 

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