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Related Experiment Video

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Evolution of Staircase Structures in Diffusive Convection

Evolution of Staircase Structures in Diffusive Convection

Published on: September 5, 2018

Sound propagation in a continuously stratified laboratory ocean model.

Likun Zhang¹, Harry L Swinney²

¹National Center for Physical Acoustics and Department of Physics and Astronomy, University of Mississippi, 145 Hill Drive, University, Mississippi 38677, USA.

The Journal of the Acoustical Society of America

|June 11, 2017

Summary

This study models underwater sound propagation in stratified fluids using salty water. Researchers measured sound speed and ray refraction, providing a basis for ocean acoustics research.

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Area of Science:

Acoustics
Fluid Dynamics
Oceanography

Background:

Sound propagation in the ocean is complex due to density stratification.
Understanding sound behavior in stratified fluids is crucial for underwater acoustics.
Laboratory experiments can simulate oceanic conditions for acoustic studies.

Purpose of the Study:

To investigate sound propagation in a density-stratified fluid.
To model sound ray refraction based on measured sound speed profiles.
To provide a foundation for laboratory modeling of underwater sound in stratified oceans.

Main Methods:

Created a density-stratified fluid by layering salty water.
Measured fluid density to determine salinity and sound speed profiles with height.
Conducted three-dimensional sound propagation measurements and compared them with ray analysis.

Main Results:

Successfully created a continuously density-stratified fluid.
Calculated height-dependent sound speed and fluid salinity.
Demonstrated that ray analysis accurately predicts sound propagation in the stratified fluid.

Conclusions:

Laboratory experiments with stratified fluids can effectively model underwater sound propagation.
The study validates the use of ray theory for predicting sound behavior in stratified environments.
Provides a valuable experimental framework for ocean acoustics research.