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Related Concept Videos

Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

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

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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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Temperature Dependent Deformation01:12

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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Stress is a quantity that describes the magnitude of a force that causes deformation, generally defined as internal force per unit area. When forces pull on an object and cause its elongation, like the stretching of an elastic band, it is called tensile stress. When forces cause the compression of an object, it is known as compressive stress. When an object is being squeezed uniformly from all sides, like a submarine in the depths of the ocean, we call this kind of stress bulk stress (or volume...
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When a force is applied on a body, it undergoes deformation. In order to restore the body to its original shape and/or size, an opposite or restoring force is generated within the body. This restoring force is equal to the magnitude of the applied force, but acts in the opposite direction. The amount of this restoring force developed per unit area of the body is called stress. Stress is a tensor quantity and has the SI unit pascal. Stress can be separated into four broad categories depending...
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Solid capillarity: when and how does surface tension deform soft solids?

Bruno Andreotti1, Oliver Bäumchen2, François Boulogne3

  • 1Physique et Mécanique des Milieux Hétérogènes, UMR 7636 ESPCI-CNRS, Université Paris-Diderot, 10 rue Vauquelin, 75005, Paris, France.

Soft Matter
|March 4, 2016
PubMed
Summary
This summary is machine-generated.

Soft solids, unlike stiff ones, exhibit large deformations due to surface stresses. This opinion piece explores recent solid capillarity advances and future research questions in this developing scientific field.

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Area of Science:

  • Physics and Materials Science
  • Focuses on the mechanical behavior of soft matter and interfacial phenomena.

Background:

  • Distinguishes soft solids from stiff solids based on their response to surface stresses.
  • Highlights the significant deformations that surface stresses can induce in soft solid materials.

Purpose of the Study:

  • To summarize recent advancements in the field of solid capillarity.
  • To identify and pose key questions for the future direction of solid capillarity research.

Main Methods:

  • Literature review and synthesis of recent findings.
  • Expert opinion and consensus building from a dedicated workshop.

Main Results:

  • Identified key recent advances in understanding solid capillarity.
  • Formulated critical questions to guide future research endeavors.

Conclusions:

  • Solid capillarity is a rapidly growing field with significant potential.
  • Further research is needed to address fundamental questions regarding surface stress-driven deformations in soft solids.