Surface impedance water layer in partially filled cavities

AI Thread Summary
The discussion centers on modeling the acoustic field in partially filled cavities with water, specifically using surface impedance as a boundary condition. The main inquiry is about standard models for the surface impedance of water and how to effectively represent it as a sound-absorbing wall. Some participants suggest that water may act more like a perfect reflector than an absorber, raising questions about the significance of its absorbent properties. The conversation explores alternative approaches to modeling the water layer's acoustic characteristics. Overall, the focus is on finding accurate methods for representing water's surface impedance in acoustic modeling.
Ilias Aouaj
Messages
3
Reaction score
0
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!
 
Engineering news on Phys.org
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?
 

Thread 'Race car suspension Class'

Posted June 2024 - 15 years after starting this class. I have learned a whole lot. To get to the short course on making your stock car, late model, hobby stock E-mod handle, look at the index below. Read all posts on Roll Center, Jacking effect and Why does car drive straight to the wall when I gas it? Also read You really have two race cars. This will cover 90% of problems you have. Simply put, the car pushes going in and is loose coming out. You do not have enuff downforce on the right...
View full post »

Thread 'Cantilever help'

I'm trying to decide what size and type of galvanized steel I need for 2 cantilever extensions. The cantilever is 5 ft. The space between the two cantilever arms is a 17 ft Gap the center 7 ft of the 17 ft Gap we'll need to Bear approximately 17,000 lb spread evenly from the front of the cantilever to the back of the cantilever over 5 ft. I will put support beams across these cantilever arms to support the load evenly
View full post »
Thread 'What's the most likely cause for this carbon seal crack?'

Thread 'What's the most likely cause for this carbon seal crack?'

We have a molded carbon graphite seal that is used in an inline axial piston, variable displacement hydraulic pump. One of our customers reported that, when using the “A” parts in the past, they only needed to replace them due to normal wear. However, after switching to our parts, the replacement cycle seems to be much shorter due to “broken” or “cracked” failures. This issue was identified after hydraulic fluid leakage was observed. According to their records, the same problem has occurred...
View full post »

Similar threads

Acoustic Resonance in Fluid-Filled Cavities
Replies
1
Views
2K
Water jet strikes a plate and slows down due to frictional forces?
Replies
4
Views
2K
Acoustic impedance water surface in partially filled tank
Replies
1
Views
2K
Can a glass of water be filled to its edge?
Replies
42
Views
6K
Cylinder filled with water deflection study
Replies
20
Views
3K
Navier-Stokes Problem: Solving for Pressure Gradient in a 2D Rectangular Cavity
Replies
33
Views
4K
I Do you think emissivity of air makes sense?
Replies
16
Views
4K
Underground pump vault airflow considerations
Replies
15
Views
3K
Help Needed with MCNP Simulation for Brachytherapy Treatment Room
Replies
1
Views
3K
Water flow system - Design an Optimization
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top