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

Boundary Layer Characteristics01:18

Boundary Layer Characteristics

428
When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
428
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility

49.9K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
49.9K
Intermolecular Forces and Physical Properties02:56

Intermolecular Forces and Physical Properties

25.9K
25.9K
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

682
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
682
Surface Tension of Fluid01:22

Surface Tension of Fluid

1.1K
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
1.1K
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

32.2K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
32.2K

You might also read

Related Articles

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

Sort by
Same author

Space-filling discrete helices.

The Journal of chemical physics·2025
Same author

Water and Carbon Dioxide Capillary Bridges in Nanoscale Slit Pores: Effects of Temperature, Pressure, and Salt Concentration on the Water Contact Angle.

Langmuir : the ACS journal of surfaces and colloids·2024
Same author

Amino-Acid Characteristics in Protein Native State Structures.

Biomolecules·2024
Same author

A Tale of Two Chains: Geometries of a Chain Model and Protein Native State Structures.

Polymers·2024
Same author

III. Geometrical framework for thinking about globular proteins: Turns in proteins.

Proteins·2024
Same author

Thermocapillary migration of a drop with a thermally conducting stagnant cap.

Journal of colloid and interface science·2023

Related Experiment Video

Updated: Dec 19, 2025

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

4.1K

Slip, immiscibility, and boundary conditions at the liquid-liquid interface.

Joel Koplik1, Jayanth R Banavar

  • 1Benjamin Levich Institute and Department of Physics, City College of the City University of New York, New York, New York 10031, USA. koplik@sci.ccny.cuny.edu

Physical Review Letters
|February 21, 2006
PubMed
Summary

Molecular dynamics simulations reveal that tangential velocity continuity is not always maintained at liquid-liquid interfaces. Apparent slip occurs when liquid density decreases near the interface, following a Navier boundary condition.

More Related Videos

Lipid Bilayer Experiments with Contact Bubble Bilayers for Patch-Clampers
07:18

Lipid Bilayer Experiments with Contact Bubble Bilayers for Patch-Clampers

Published on: January 16, 2019

10.0K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.4K

Related Experiment Videos

Last Updated: Dec 19, 2025

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer
10:11

Temperature-Controlled Assembly and Characterization of a Droplet Interface Bilayer

Published on: April 19, 2021

4.1K
Lipid Bilayer Experiments with Contact Bubble Bilayers for Patch-Clampers
07:18

Lipid Bilayer Experiments with Contact Bubble Bilayers for Patch-Clampers

Published on: January 16, 2019

10.0K
Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

7.4K

Area of Science:

  • Fluid dynamics
  • Interfacial phenomena
  • Computational physics

Background:

  • Conventional fluid dynamics assumes continuous tangential velocity at liquid-liquid interfaces.
  • This assumption is fundamental for modeling multiphase flow systems.
  • However, molecular-level behavior at interfaces can deviate from continuum predictions.

Purpose of the Study:

  • To investigate the validity of the tangential velocity continuity assumption at interfaces between two flowing liquids.
  • To explore the molecular mechanisms governing interfacial slip in multiphase systems.
  • To determine the conditions under which apparent slip occurs and its relationship to interfacial properties.

Main Methods:

  • Utilized molecular dynamics (MD) simulations to model two-layered liquid systems.
  • Simulated both Couette and Poiseuille flow configurations.
  • Varied molecular structures and intermolecular interactions to probe different interfacial conditions.

Main Results:

  • Observed significant deviations from tangential velocity continuity under specific conditions.
  • Found that a sharp decrease in liquid density near the interface leads to rapid velocity variations.
  • Quantified this rapid variation as an apparent slip, consistent with Navier boundary conditions.

Conclusions:

  • The assumption of tangential velocity continuity is not universally applicable at liquid-liquid interfaces.
  • Interfacial slip is a real phenomenon driven by local density changes.
  • Navier boundary conditions accurately describe the observed apparent slip at the molecular level.