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

1.8K
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...
1.8K
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

34.0K
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...
34.0K
Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

3.4K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.4K
Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

1.1K
Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
1.1K
Types of Fluids01:27

Types of Fluids

1.1K
Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
1.1K
Viscosity01:17

Viscosity

7.6K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
7.6K

You might also read

Related Articles

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

Sort by
Same author

Short-range order and atomic dynamics of Ti<sub>75</sub>Ni<sub>25</sub>melts.

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

Homogeneous nucleation of undercooled Al-Ni melts via a machine-learned interaction potential.

The Journal of chemical physics·2025
Same author

Microscopic theory for nonequilibrium correlation functions in dense active fluids.

Physical review. E·2024
Same author

Ex-vivo validation of spatial gain sonography for the quantification of echo intensity in fascicle-aligned ultrasound images in ten anatomical muscles in Bos taurus.

Scientific reports·2024
Same author

Curvature of gastrocnemius muscle fascicles as function of muscle-tendon complex length and contraction in humans.

Physiological reports·2023
Same author

From Subaging to Hyperaging in Structural Glasses.

Physical review letters·2022

Related Experiment Video

Updated: Mar 3, 2026

Challenges in Rheological Characterization of Highly Concentrated Suspensions &#8212; A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.6K

Shear-Rate Dependent Surface Tension of Glass-Forming Fluids.

Linnea Heitmeier1, Thomas Voigtmann1

  • 1Heinrich-Heine Universität Düsseldorf, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institute of Frontier Materials on Earth and in Space, 51170 Köln, Germany and Department of Physics, Universitätsstraße 1, 40225, Düsseldorf, Germany.

Physical Review Letters
|March 1, 2026
PubMed
Summary
This summary is machine-generated.

We found that surface tension in non-Newtonian fluids changes with shear rate. Our method accurately measures this shear-dependent surface tension, crucial for understanding complex fluid interfaces.

More Related Videos

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
10:28

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids

Published on: January 3, 2014

15.6K
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

13.8K

Related Experiment Videos

Last Updated: Mar 3, 2026

Challenges in Rheological Characterization of Highly Concentrated Suspensions &#8212; A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.6K
Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids
10:28

Experimental Measurement of Settling Velocity of Spherical Particles in Unconfined and Confined Surfactant-based Shear Thinning Viscoelastic Fluids

Published on: January 3, 2014

15.6K
Studying Large Amplitude Oscillatory Shear Response of Soft Materials
06:07

Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

13.8K

Area of Science:

  • Rheology
  • Interfacial Science
  • Complex Fluids

Background:

  • Non-Newtonian fluids exhibit complex flow behavior.
  • Interfacial properties like surface tension are critical in fluid dynamics.
  • Standard surface tension measurements may be inaccurate for complex fluids under shear.

Purpose of the Study:

  • To investigate the shear rate dependence of surface tension at the interface of a glass-forming fluid.
  • To develop a method for accurately measuring genuine interfacial tension in non-Newtonian fluids under shear.
  • To clarify the influence of shear flow on interfacial properties.

Main Methods:

  • Applying shear flow to the fluid interface.
  • Analyzing pressure anisotropy to distinguish bulk and interfacial regions.
  • Developing a novel approach to extract shear-rate dependent surface tension.

Main Results:

  • Surface tension was observed to be dependent on the applied shear rate.
  • The standard method for surface tension determination can yield an effective tension that conflates bulk and interface properties.
  • A method was established to clearly define interfacial regions and extract true shear-dependent surface tension.

Conclusions:

  • Interfacial tension in non-Newtonian fluids is shear-rate dependent.
  • Accurate measurement of interfacial rheology requires distinguishing bulk and interface contributions.
  • The findings impact measurement techniques for complex fluid interfaces.