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関連する概念動画

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 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...
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,...
Contact Angle01:13

Contact Angle

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 force...
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,...
Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...

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関連する実験動画

Updated: Jul 11, 2026

High Throughput Analysis of Liquid Droplet Impacts
09:00

High Throughput Analysis of Liquid Droplet Impacts

Published on: March 6, 2020

液体表面へのドロップレットインパクト

B Ching, M W Golay, T J Johnson

    Science (New York, N.Y.)
    |November 2, 1984
    PubMed
    まとめ
    この要約は機械生成です。

    液体表面に衝突する単一滴が反発することは決して観察されなかった. 表面張力は,滴流の吸収と反発を支配し,エネルギーとモメンタムの保存が相互作用を説明します.

    さらに関連する動画

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
    08:49

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

    Published on: February 17, 2019

    Visualization of High Speed Liquid Jet Impaction on a Moving Surface
    08:34

    Visualization of High Speed Liquid Jet Impaction on a Moving Surface

    Published on: April 17, 2015

    関連する実験動画

    Last Updated: Jul 11, 2026

    High Throughput Analysis of Liquid Droplet Impacts
    09:00

    High Throughput Analysis of Liquid Droplet Impacts

    Published on: March 6, 2020

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
    08:49

    Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

    Published on: February 17, 2019

    Visualization of High Speed Liquid Jet Impaction on a Moving Surface
    08:34

    Visualization of High Speed Liquid Jet Impaction on a Moving Surface

    Published on: April 17, 2015

    科学分野:

    • 流体力学 流体力学
    • 表面物理学の表面物理学について

    背景:

    • ドロップレットインパクト現象は,様々な産業および自然プロセスにおいて極めて重要です.
    • 吸収と反発を含むドロップレット行動を理解することは,流体相互作用を予測するために不可欠です.

    研究 の 目的:

    • 深層の液体表面に衝撃を与える単一滴や滴流の吸収と反発を実験的に調査する.
    • ドロップレットストリームの衝撃と吸収の基準を確立する.
    • これらの相互作用を支配する支配的な物理的メカニズムを特定する.

    主な方法:

    • 深い液体に対する滴 (直径 <1200マイクロメートル) の衝撃の実験試験.
    • 機械的エネルギーと運動量原理の保存の適用.
    • ドロップレット行動に対する表面張りの影響の分析.

    主要な成果:

    • 単一滴は一貫して吸収され,反発することは決して観察されなかった.
    • 表面張りは,ドロップレット行動に影響を与える主要な要因として特定されました.
    • ドロップレットストリームにはインパクト基準が開発され,吸収とリバウンドを区別しました.

    結論:

    • 衝撃滴の振る舞いは,主に表面張力によって支配されます.
    • 単一滴の衝撃は,リバウンドではなく吸収をもたらします.
    • 確立された基準は,滴流と液体の相互作用を理解するための枠組みを提供します.