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Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

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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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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 concentration...
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Surface tension varies with...
Surface Tension and Surface Energy01:16

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Updated: May 29, 2026

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
11:20

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

Published on: August 15, 2018

Predictive model for ice formation on superhydrophobic surfaces.

Vaibhav Bahadur1, Lidiya Mishchenko, Benjamin Hatton

  • 1School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|September 9, 2011
PubMed
Summary
This summary is machine-generated.

Superhydrophobic surfaces can prevent ice formation on cold surfaces down to -25°C. This physics-based model analyzes droplet impact, heat transfer, and nucleation to design effective icephobic surfaces.

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Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

Published on: February 11, 2020

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Last Updated: May 29, 2026

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
11:20

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

Published on: August 15, 2018

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
08:02

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

Published on: February 11, 2020

Area of Science:

  • Materials Science
  • Fluid Dynamics
  • Thermodynamics

Background:

  • Ice accumulation poses significant challenges in aviation, construction, and energy.
  • Superhydrophobic surfaces are a promising area for ice prevention research.

Purpose of the Study:

  • To develop a physics-based model predicting ice formation on cooled superhydrophobic surfaces.
  • To analyze droplet impact, heat transfer, and ice nucleation dynamics.

Main Methods:

  • Developed submodels for droplet impact dynamics, heat transfer, and heterogeneous ice nucleation.
  • Integrated submodels into a comprehensive framework for ice formation analysis.
  • Validated the model against experimental data.

Main Results:

  • The model accurately predicts experimental findings.
  • Superhydrophobic surfaces prevented freezing down to -20 to -25 °C.
  • Demonstrated the model's capability to study surface properties' influence on ice formation.

Conclusions:

  • The developed framework is the first detailed modeling tool for designing ice prevention/reduction strategies.
  • The model can identify critical parameters for achieving icephobic surfaces.
  • Provides insights into dynamic ice formation on superhydrophobic surfaces.