Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

1.5K
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...
1.5K
Laminar Flow: Problem Solving01:24

Laminar Flow: Problem Solving

602
Laminar flow occurs when a fluid moves smoothly in parallel layers with minimal mixing and turbulence. In fluid mechanics, ensuring laminar flow within a pipe is essential for precise control of flow characteristics, especially in engineering applications. The key factor in determining whether flow remains laminar is the Reynolds number, a dimensionless quantity that depends on the fluid's velocity, density, viscosity, and the pipe's diameter. A Reynolds number of 2100 or lower...
602
Laminar Flow01:27

Laminar Flow

2.6K
Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
2.6K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

1.0K
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
1.0K
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

11.9K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
11.9K
General Characteristics of Pipe Flow II01:24

General Characteristics of Pipe Flow II

1.7K
When fluid enters a pipe, it first passes through the entrance region, where the velocity profile adjusts due to viscous effects. In this region, a boundary layer forms along the pipe walls and grows until it fully occupies the pipe's cross-section. Once the boundary layer merges, the flow becomes fully developed, with a steady velocity profile that remains consistent along the pipe's length.
The distance to reach a fully developed flow is called the entrance length and depends on the...
1.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Experimental characterization of the freezing of the transmitted pattern in a periodic waveguide.

The Journal of the Acoustical Society of America·2025
Same author

Broadband-omnidirectional absorption using inclined wiremesh gratingsa).

JASA express letters·2025
Same author

A nonreciprocal and tunable active acoustic scatterera).

The Journal of the Acoustical Society of America·2025
Same author

Invariance of the speckle pattern of the transmitted wave in periodic waveguides.

Scientific reports·2025
Same author

Loss-induced modal selection by a resistive wiremesh.

The Journal of the Acoustical Society of America·2024
Same author

Higher-order mode filtering by a resistive layer.

JASA express letters·2023
Same journal

Segmental vs phrase-level creak in Polish: An acoustic analysis.

The Journal of the Acoustical Society of America·2026
Same journal

Interaction of near-wall bubble arrays with acoustic waves induced by an oscillating rigid wall.

The Journal of the Acoustical Society of America·2026
Same journal

Ultra-broadband underwater acoustic projector based on transverse resonance orthogonal beam (TROB) mode and acoustic matching layer technique.

The Journal of the Acoustical Society of America·2026
Same journal

Fine-scale quantitative analysis of bowhead whale (Balaena mysticetus) song shows varying stability of song types.

The Journal of the Acoustical Society of America·2026
Same journal

High-resolution depth estimation for multiple wideband sources in deep sea via sparse Bayesian learninga).

The Journal of the Acoustical Society of America·2026
Same journal

Depression markers in speech: An approach based on tract variables dynamics.

The Journal of the Acoustical Society of America·2026
See all related articles

Related Experiment Video

Updated: Apr 4, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.2K

Slow sound in lined flow ducts.

Yves Aurégan1, Vincent Pagneux1

  • 1Laboratoire d'Acoustique de l'Université du Maine, Unité Mixte de Recherche 6613, Centre National de la Recherche Scientifique, Avenue O Messiaen, F-72085 LE MANS Cedex 9, France.

The Journal of the Acoustical Society of America
|September 3, 2015
PubMed
Summary
This summary is machine-generated.

This study examines acoustic wave propagation in lined flow ducts. Findings reveal how reactive liners influence sound speed and mode interactions, crucial for understanding acoustic scattering in varying impedance environments.

More Related Videos

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

8.9K
Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
09:37

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

6.2K

Related Experiment Videos

Last Updated: Apr 4, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.2K
Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

8.9K
Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
09:37

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

6.2K

Area of Science:

  • Acoustics
  • Fluid Dynamics
  • Aeroacoustics

Background:

  • Acoustic propagation in lined ducts is critical for noise control.
  • Reactive liners can alter acoustic properties, influencing wave-structure interactions.
  • Low Mach number flows (M≈0.3) exhibit complex acoustic-hydrodynamic coupling.

Purpose of the Study:

  • To investigate acoustic wave propagation in a lined flow duct with purely reactive wall impedance.
  • To develop a simplified model for studying acoustic wave scattering in ducts with non-uniform wall impedance.
  • To characterize the influence of liner properties on acoustic modes and wave interactions.

Main Methods:

  • Developed an approximate one-dimensional model from a 2D formulation.
  • Analyzed acoustic propagation in a straight duct with uniform flow and varying wall impedance.
  • Characterized different scattering scenarios, including negative energy waves and mode interactions.

Main Results:

  • Reactive liners reduce the speed of sound, enhancing acoustic-flow interaction.
  • The number and direction of propagating modes change with frequency.
  • Scattering phenomena are influenced by negative energy waves and strong mode coupling.

Conclusions:

  • The simplified model effectively studies acoustic scattering in ducts with varying impedance.
  • Understanding mode interactions and negative energy waves is key to predicting acoustic behavior.
  • This research provides insights into acoustic management in flow systems.