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

General Characteristics of Pipe Flow I01:22

General Characteristics of Pipe Flow I

1.8K
Pipe flow refers to the movement of fluids within fully enclosed conduits, typically cylindrical in shape, such as water pipes or hydraulic hoses. These conduits are designed to withstand high-pressure gradients that drive fluid movement, contrasting with open-channel flows, where gravity is the primary driving force. Rectangular conduits, like air conditioning and heating ducts, generally operate at lower pressures and are less suited for high-pressure applications.
The classification of fluid...
1.8K
Single Pipe Systems01:24

Single Pipe Systems

534
In pipe flow analysis, problems are typically categorized into three types — Type I, Type II, and Type III — based on the known parameters and the desired outcome. Each type of problem addresses specific engineering requirements using fluid properties, pipe characteristics, and operational conditions.
In a Type I problem, fluid properties (density and viscosity), pipe characteristics (including diameter, length, and surface roughness), and the flow rate or average velocity are...
534
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
Major Losses in Pipes01:28

Major Losses in Pipes

2.1K
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
2.1K
Pipe Flowrate Measurement01:28

Pipe Flowrate Measurement

1.4K
In pipe flow measurement, orifice, nozzle, and Venturi meters are commonly used to determine fluid flowrates by constricting the flow area, which increases fluid velocity and reduces pressure. This pressure difference, governed by Bernoulli's principle and adjusted for real-world conditions, is essential for calculating flowrate. Each meter type is suited to specific applications based on accuracy, efficiency, and compatibility with various flow conditions.
The orifice meter is a simple,...
1.4K
Design Example: Flow of Oil Through Circular Pipes01:25

Design Example: Flow of Oil Through Circular Pipes

517
Understanding fluid flow behavior through pipes is critical in fluid mechanics, especially in applications like oil transportation through pipelines. Hagen-Poiseuille's law provides an exact solution derived from the Navier-Stokes equations for steady, incompressible, and laminar flow within a circular pipe. Hagen-Poiseuille's law helps determine the necessary pressure drop across a pipeline section by determining parameters like pipe length, radius, oil viscosity, and the desired volumetric...
517

You might also read

Related Articles

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

Sort by
Same author

Acceleration is the key to drag reduction in turbulent flow.

Proceedings of the National Academy of Sciences of the United States of America·2024
Same author

End effects in low aspect ratio Taylor-Couette flow.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2023
Same journal

Inverse FIP effect plasma in the solar atmosphere: a synthesis of current understanding and new insights from AR 11967.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Signs of sulfur fractionation under high magnetic field strength.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

First ionization potential fractionation of sulfur observed with spectral imaging of the coronal environment.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Chromospheric dynamics and turbulence regulate the solar FIP effect.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Exploring the link between wave activity in the photospheric velocity driver and the FIP bias in the solar corona.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Radiative hydrodynamic simulations of first ionization potential fractionation in solar flares.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
See all related articles

Related Experiment Video

Updated: Mar 7, 2026

Design and Optimization Strategies of a High-Performance Vented Box
14:23

Design and Optimization Strategies of a High-Performance Vented Box

Published on: June 9, 2023

1.7K

Structure identification in pipe flow using proper orthogonal decomposition.

Leo H O Hellström1, Alexander J Smits2

  • 1Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, USA lhellstr@princeton.edu.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|February 8, 2017
PubMed
Summary
This summary is machine-generated.

Proper orthogonal decomposition reveals pressure aligns with large-scale turbulent motions in pipe flow. Low-pressure regions follow high-pressure regions in these energetic structures.

Keywords:
coherent structuresturbulencewall bounded flow

More Related Videos

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
Calibration Procedures for Orthogonal Superposition Rheology
08:43

Calibration Procedures for Orthogonal Superposition Rheology

Published on: November 18, 2020

2.5K

Related Experiment Videos

Last Updated: Mar 7, 2026

Design and Optimization Strategies of a High-Performance Vented Box
14:23

Design and Optimization Strategies of a High-Performance Vented Box

Published on: June 9, 2023

1.7K
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
Calibration Procedures for Orthogonal Superposition Rheology
08:43

Calibration Procedures for Orthogonal Superposition Rheology

Published on: November 18, 2020

2.5K

Area of Science:

  • Fluid Dynamics
  • Turbulence Research
  • Computational Fluid Dynamics

Background:

  • Turbulent pipe flow is a fundamental problem in fluid dynamics.
  • Understanding energetic motions is crucial for developing accurate turbulence models.
  • Direct numerical simulations (DNS) provide detailed flow field data.

Purpose of the Study:

  • To investigate energetic motions in turbulent pipe flow using proper orthogonal decomposition (POD).
  • To extend POD to include pressure information alongside velocity components.
  • To analyze the relationship between pressure and large-scale turbulent structures.

Main Methods:

  • Direct numerical simulations (DNS) of turbulent pipe flow at Reτ=685.
  • Application of proper orthogonal decomposition (POD) to the velocity field.
  • Extension of POD to incorporate the pressure field for each mode.

Main Results:

  • The pressure component of POD modes aligns with the streamwise velocity component of large-scale motions.
  • Positive pressure correlates with positive streamwise velocity, and negative pressure with negative streamwise velocity.
  • Visualizations show structures with low-pressure downstream and high-pressure upstream regions, similar to large-scale, low-momentum motions.

Conclusions:

  • Pressure plays a significant role in the dynamics of large-scale turbulent structures in pipe flow.
  • The extended POD method effectively identifies pressure-velocity correlations in turbulent flows.
  • Findings contribute to high-fidelity modeling of wall turbulence at high Reynolds numbers.