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

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,...
General Characteristics of Pipe Flow II01:24

General Characteristics of Pipe Flow II

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 flow...
General Characteristics of Pipe Flow I01:22

General Characteristics of Pipe Flow I

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...
Capillarity in Fluid01:19

Capillarity in Fluid

Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
Couette Flow01:22

Couette Flow

Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
General External Flow Characteristics01:26

General External Flow Characteristics

The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...

You might also read

Related Articles

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

Sort by
Same author

Molecular dynamics study of water anomalies: a comparison of OPC3 and TIP4P/ <math><mi>ε</mi></math> models.

Journal of molecular modeling·2026
Same author

Intrinsic Disorder as a Biomimetic Design Paradigm.

Biomimetics (Basel, Switzerland)·2026
Same author

Preface to the JPCM Focus Issue on soft condensed matter physics in the Global South: emerging directions in complex systems.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Empirical no-go principles for rigid three-point water models: A physically guided manifold of optimality.

The Journal of chemical physics·2026
Same author

A molecular dynamics study of PIM<sub>2</sub> lipid bilayer membranes.

Journal of molecular graphics & modelling·2026
Same author

Competing length scales and symmetry frustration govern nonuniversal melting in two-dimensional core-softened colloidal crystals.

Physical review. E·2025

Related Experiment Video

Updated: May 11, 2026

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy
08:10

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy

Published on: February 5, 2017

Relation between flow enhancement factor and structure for core-softened fluids inside nanotubes.

José Rafael Bordin1, Alexandre Diehl, Marcia C Barbosa

  • 1Programa de Pós-Graduação em Física, Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15051, CEP 91501-970, Porto Alegre, RS, Brazil. bordin@if.ufrgs.br

The Journal of Physical Chemistry. B
|May 23, 2013
PubMed
Summary
This summary is machine-generated.

Core-softened fluids confined in nanotubes show distinct flow behaviors based on their interactions. Nanotube radius influences flow enhancement, revealing a transition from continuum to subcontinuum flow at smaller radii.

More Related Videos

Measuring Material Microstructure Under Flow Using 1-2 Plane Flow-Small Angle Neutron Scattering
09:08

Measuring Material Microstructure Under Flow Using 1-2 Plane Flow-Small Angle Neutron Scattering

Published on: February 6, 2014

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
09:12

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

Related Experiment Videos

Last Updated: May 11, 2026

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy
08:10

Precision Milling of Carbon Nanotube Forests Using Low Pressure Scanning Electron Microscopy

Published on: February 5, 2017

Measuring Material Microstructure Under Flow Using 1-2 Plane Flow-Small Angle Neutron Scattering
09:08

Measuring Material Microstructure Under Flow Using 1-2 Plane Flow-Small Angle Neutron Scattering

Published on: February 6, 2014

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
09:12

Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

Area of Science:

  • Condensed Matter Physics
  • Fluid Dynamics
  • Computational Chemistry

Background:

  • Understanding fluid behavior in nanoscale confinement is crucial for various applications.
  • Core-softened potentials mimic anomalous properties of water, making them relevant for studying confined fluids.
  • Previous studies have explored confined fluids, but the interplay of fluid structure, flow, and nanotube dimensions requires further investigation.

Purpose of the Study:

  • To investigate the relationship between flow enhancement and the structure of core-softened fluids within nanotubes.
  • To analyze the impact of nanotube radius on flow properties for different fluid interaction potentials.
  • To explore the transition from continuum to subcontinuum flow regimes in confined systems.

Main Methods:

  • Nonequilibrium molecular dynamics (NEMD) simulations were employed.
  • The dual control volume grand canonical molecular dynamics (DCV-GCMD) method was used to establish a pressure gradient.
  • Core-softened fluids with attractive and purely repulsive two-length-scale potentials were simulated.

Main Results:

  • Nanotube radius significantly affects the flow enhancement factor, with distinct behaviors observed for attractive and repulsive potentials.
  • A transition from continuum to subcontinuum flow was identified for smaller nanotube radii.
  • Structural and dynamical properties of confined fluids were found to be intrinsically linked, explaining observed flow behaviors.

Conclusions:

  • Core-softened fluids exhibit unique flow characteristics within nanotubes, influenced by both fluid-fluid interactions and nanotube geometry.
  • The findings align with experimental observations and all-atom molecular dynamics simulations of water, validating the two-length-scale potential model.
  • The study provides insights into nanoscale fluid transport and the fundamental physics governing fluid behavior under confinement.