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

2.0K
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...
2.0K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

1.1K
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.
1.1K
Turbulent Flow01:24

Turbulent Flow

910
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
910
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

9.7K
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...
9.7K
Velocity and Acceleration in Steady and Unsteady Flow01:11

Velocity and Acceleration in Steady and Unsteady Flow

522
In fluid mechanics, velocity and acceleration are key concepts for analyzing particle motion in both steady and unsteady flow. Consider a fluid particle moving along a pathline, where its velocity depends on its position and time. The particle's acceleration is obtained by differentiating the velocity with respect to time.
The acceleration can be generalized to any point in the flow, and expressed as components along three perpendicular directions, representing changes in velocity over...
522
Poiseuille's Law and Reynolds Number01:10

Poiseuille's Law and Reynolds Number

8.2K
Any fluid in a horizontal tube can flow due to pressure differences—fluid flows from high to low pressure. The flow rate (Q) is the ratio of pressure difference and resistance through a horizontal tube. The greater the pressure difference, the higher the flow rate. The flow resistance is expressed as:
8.2K

You might also read

Related Articles

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

Sort by
Same author

Stability, separation and close body interactions. Introduction.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2014
Same author

[Use of antianaerobic agents in treating periodontitis in children].

Stomatologiia·1986
Same author

[Effect of local hypothermia on the vascular permeability of the periodontium].

Stomatologiia·1984
Same author

[Antimicrobial action of combinations of monomycin and furagin with preparation P-1].

Mikrobiolohichnyi zhurnal·1974

Related Experiment Video

Updated: Apr 28, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.2K

Instability of supersonic compression ramp flow.

R P Logue1, J S B Gajjar2, A I Ruban3

  • 1School of Mathematics, University of Manchester, Manchester M13 9PL, UK j.gajjar@manchester.ac.uk.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|June 18, 2014
PubMed
Summary

Investigating supersonic compression ramp flow instability at high Reynolds numbers reveals no singularities for increasing ramp angles. Numerical simulations show growing wavepacket disturbances, though results vary with grid size.

Keywords:
compression rampinstabilityshock-wave boundary layer interactiontransitiontriple-deck

More Related Videos

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.2K
Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

8.1K

Related Experiment Videos

Last Updated: Apr 28, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.2K
Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.2K
Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

8.1K

Area of Science:

  • Fluid dynamics
  • Aerodynamics
  • Computational fluid dynamics

Background:

  • Supersonic flows over compression ramps are critical in aerospace applications.
  • Understanding flow instability is key to predicting aerodynamic performance and stability.
  • High Reynolds number flows present unique challenges due to viscous effects.

Purpose of the Study:

  • To investigate the instability of supersonic compression ramp flow.
  • To analyze flow behavior under high Reynolds number conditions using unsteady triple-deck equations.
  • To determine the impact of ramp angles on flow stability.

Main Methods:

  • Solving steady triple-deck equations to calculate mean flow for various ramp angles.
  • Employing two stability analysis approaches: linearized unsteady equations for global modes and numerical simulations with varied initial conditions.
  • Assessing the influence of grid size on numerical simulation accuracy.

Main Results:

  • No singularities were found for increasing ramp angles in the mean flow calculations.
  • No globally unsteady modes were detected within the studied range of ramp angles.
  • Numerical simulations demonstrated the development of wavepacket disturbances that grow and convect to large amplitudes.
  • Significant grid size dependency was observed in the numerical results.

Conclusions:

  • Supersonic compression ramp flow does not exhibit singularities with increasing ramp angles.
  • While global instability modes were not found, localized wavepacket disturbances can emerge and grow.
  • Further research is needed to refine numerical methods and address grid dependency for accurate instability prediction.