Surface impedance water layer in partially filled cavities

In summary, the conversation was about modeling the acoustic field within partially filled cavities and specifically discussing how to model the water layer as a sound absorbing wall. The person was seeking advice on standard surface impedance models for fluids like water and was open to other suggestions. It was mentioned that the water may be intended to be a perfect reflector rather than an absorber.
  • #1
Ilias Aouaj
3
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!
 
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  • #2
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.
 
  • #3
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?
 

Related to Surface impedance water layer in partially filled cavities

1. What is surface impedance water layer in partially filled cavities?

The surface impedance water layer in partially filled cavities refers to the layer of water that exists at the surface of a liquid in a partially filled cavity. This layer is formed due to the surface tension of the liquid and is an important factor in the dynamics and behavior of the liquid in the cavity.

2. Why is surface impedance water layer important in partially filled cavities?

The surface impedance water layer plays a significant role in the hydrodynamics of partially filled cavities. It affects the surface pressure, wave propagation, and damping characteristics of the liquid in the cavity. Understanding the behavior of this layer is crucial in various applications such as ship design, marine engineering, and offshore structures.

3. How is the surface impedance water layer measured?

The surface impedance water layer can be measured using various methods such as surface tension measurements, optical methods, and electrochemical impedance spectroscopy. These techniques involve measuring the surface tension, thickness, and electrical properties of the layer to determine its behavior and characteristics.

4. What factors affect the surface impedance water layer in partially filled cavities?

The surface impedance water layer is influenced by several factors, including the properties of the liquid, the geometry of the cavity, and external conditions such as temperature and pressure. The surface tension, viscosity, and density of the liquid, as well as the size and shape of the cavity, all play a role in determining the behavior of this layer.

5. How does the surface impedance water layer impact the stability of partially filled cavities?

The surface impedance water layer can affect the stability of partially filled cavities by altering the surface pressure and wave propagation characteristics of the liquid in the cavity. It can also affect the hydrodynamic forces acting on the cavity and lead to instabilities such as sloshing. Understanding and controlling this layer is crucial in ensuring the stability and safety of structures such as ships and offshore platforms.

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