Related Experiment Video
Updated: Jan 27, 2026
12:26
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
17.8K
Guided acoustic waves at the intersection of interfaces and surfaces
P D Pupyrev1, I A Nedospasov2, A P Mayer3
1Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilova Str. 38, 119991 Moscow, Russia; HS Offenburg - University of Applied Sciences, Klosterstr. 14, 77723 Gengenbach, Germany.
Ultrasonics
|March 19, 2019
Summary
This study investigates guided acoustic waves in various elastic geometries. Researchers found their existence depends on interface angles and material properties, with potential applications in non-destructive evaluation and geophysics.
Area of Science:
- Acoustics and Solid Mechanics
- Computational Physics
Background:
- Guided acoustic waves are crucial for understanding wave propagation in layered and structured elastic media.
- Investigating wave behavior in complex geometries is essential for advanced material analysis.
Purpose of the Study:
- To numerically investigate the existence and properties of guided acoustic waves in three distinct elastic geometries.
- To determine the influence of geometric parameters (inclination and wedge angles) on wave existence.
- To identify and analyze leaky waves in specific material configurations.
Main Methods:
- Numerical calculations were performed on three geometries: inclined interface half-space, wedge, and layered elastic structures.
- The semi-analytical finite element scheme and a double series expansion method were employed.
- Existence ranges for guided waves were determined, particularly for Poisson media.
Main Results:
- Guided acoustic waves were found to exist in all investigated geometries.
- Wave existence strongly depends on inclination and wedge angles in specific systems.
- Leaky waves with localized displacements were identified in systems with acoustic mismatch and layered structures.
Conclusions:
- The study confirms the existence of fully guided and leaky acoustic waves in complex elastic systems.
- These wave phenomena are sensitive to geometric and material properties.
- Findings have implications for non-destructive evaluation of composites and geophysical prospecting.
Related Concept Videos
02:04Protein-protein Interfaces
14.7K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.7K
02:12The Wave Nature of Light
61.2K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
61.2K
01:20Half wave rectifier
2.4K
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
2.4K
01:22Full wave rectifier
2.7K
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
2.7K
01:10Wave Parameters
9.3K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
9.3K
01:07Reflection of Waves
4.6K
When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
4.6K