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Related Concept Videos

Surface Tension of Fluid01:22

Surface Tension of Fluid

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 with...
Surface Tension01:24

Surface Tension

Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...
Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

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

Surface Tension, Capillary Action, and Viscosity

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...

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Related Experiment Video

Updated: Jul 5, 2026

Accurate Determination of the Equilibrium Surface Tension Values with Area Perturbation Tests
07:57

Accurate Determination of the Equilibrium Surface Tension Values with Area Perturbation Tests

Published on: August 30, 2019

Multiple histogram reweighting method for the surface tension calculation.

A Ghoufi1, F Goujon, V Lachet

  • 1IFP, Rueil Malmaison Cedex, France.

The Journal of Chemical Physics
|April 25, 2008
PubMed
Summary
This summary is machine-generated.

Multiple histogram reweighting efficiently calculates ensemble averages. This method was extended to compute surface tension for carbon dioxide

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Area of Science:

  • Thermodynamics
  • Statistical Mechanics
  • Computational Chemistry

Background:

  • Calculating ensemble averages across thermodynamic conditions typically requires numerous simulations.
  • Surface tension is a critical property in fluid systems.
  • Existing methods for surface tension calculation can be computationally intensive.

Purpose of the Study:

  • To extend the multiple histogram reweighting method for surface tension calculations.
  • To develop a novel computational approach for determining surface tension.
  • To validate the new method against experimental data and established simulation techniques.

Main Methods:

  • Developed multiple histogram reweighting with slab decomposition.
  • Decomposed the system into slabs perpendicular to the interface.
  • Utilized Monte Carlo (MC) simulations to calculate local chemical potential and configurational energy.

Main Results:

  • The new methodology accurately calculates surface tension.
  • Results show excellent agreement with experimental data for CO2 liquid-vapor interface.
  • The method is consistent with standard NVT MC simulations.

Conclusions:

  • Multiple histogram reweighting with slab decomposition is a robust and efficient method for surface tension calculation.
  • This approach reduces the computational cost associated with simulating multiple thermodynamic states.
  • The validated method offers a reliable alternative for studying interfacial phenomena in fluids.