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

Surface Tension of Fluid01:22

Surface Tension of Fluid

1.9K
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...
1.9K
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

28.7K
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...
28.7K
Excess Pressure Inside a Drop and a Bubble01:13

Excess Pressure Inside a Drop and a Bubble

3.5K
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
3.5K
Dry Friction01:30

Dry Friction

1.3K
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
1.3K
Frictional Force01:07

Frictional Force

8.3K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
8.3K
Contact Angle01:13

Contact Angle

27.7K
When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...
27.7K

You might also read

Related Articles

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

Sort by
Same author

Composite A<sub>2</sub>M<sub>6</sub>O<sub>13</sub> anodes (A = Li, Na; M = Ti, Zr) for Li-Na dual cation batteries: a theoretical investigation.

RSC advances·2026
Same author

Imidazole-[1,5‑<i>a</i>]‑Pyridines Can Occupy the EGFR Allostery with a Strong Polar Interaction.

ACS omega·2026
Same author

Mechanical stability and thermodynamic properties of GeP and [Formula: see text] as battery anode materials from first principles.

Scientific reports·2026
Same author

Surface Activity of <i>n</i>-Carboxylic Acids.

The journal of physical chemistry. B·2025
Same author

Porous Silica Gels Doped with Gold Nanoparticles: Preparation, Microstructure, Optical and Textural Properties.

Gels (Basel, Switzerland)·2025
Same author

Relationship between Molecular Structure and Surface Activity of Ionic Surfactants.

The journal of physical chemistry. B·2024

Related Experiment Video

Updated: May 6, 2026

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

5.9K

Tribology of thin wetting films between bubble and moving solid surface.

Stoyan I Karakashev1, Klaus W Stöckelhuber2, Roumen Tsekov1

  • 1Department of Physical Chemistry, University of Sofia, 1164 Sofia, Bulgaria.

Advances in Colloid and Interface Science
|November 9, 2013
PubMed
Summary

This study pioneers the investigation of bubble rubbing on solid surfaces by coupling theory and unique experiments. We reveal distinct friction regimes and map pressure and friction forces, advancing tribology understanding.

Keywords:
FrictionLift forceStribeck curvesThin wetting filmsTribology

More Related Videos

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
13:57

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes

Published on: December 24, 2014

15.1K
Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
07:08

Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films

Published on: August 18, 2018

8.2K

Related Experiment Videos

Last Updated: May 6, 2026

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

5.9K
Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
13:57

Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes

Published on: December 24, 2014

15.1K
Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
07:08

Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films

Published on: August 18, 2018

8.2K

Area of Science:

  • Tribology
  • Fluid Dynamics
  • Surface Science

Background:

  • Bubble and droplet motion near surfaces is crucial in various scientific and industrial applications.
  • Understanding the tribological interactions at the bubble-solid interface is essential for predicting and controlling fluid behavior.

Purpose of the Study:

  • To develop a theoretical framework for bubble-solid surface interactions.
  • To experimentally investigate the tribology of bubble rubbing on a solid surface.
  • To determine friction coefficients and pressure distributions at different speeds.

Main Methods:

  • Developed a theory for wetting films between a bubble and a moving solid surface.
  • Derived a non-linear evolution differential equation for the friction slip coefficient.
  • Utilized a unique interferometric experimental setup to obtain stationary 3D film thickness profiles.
  • Mapped lift pressure, friction force per unit area, and friction coefficient at various speeds.

Main Results:

  • Observed a mixed friction regime (6-170 μm/s) transitioning to fully lubricated friction.
  • Friction coefficient is high at low speeds, decreasing significantly with increasing speed.
  • Derived 3D maps of bubble proximity to the solid surface, offering profound insights.

Conclusions:

  • Successfully coupled theory and experiment to elucidate bubble-solid surface tribology.
  • The study provides a novel understanding of friction dynamics and pressure distributions.
  • This research represents a significant advancement in studying bubble-surface interactions.