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関連する概念動画

Excess Pressure Inside a Drop and a Bubble01:13

Excess Pressure Inside a Drop and a Bubble

2.2K
The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
2.2K
Free Jet01:14

Free Jet

238
Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:
238
Vapor Pressure of Fluid01:28

Vapor Pressure of Fluid

1.5K
The vapor pressure of a fluid is a crucial concept in fluid mechanics, influencing phenomena such as boiling and cavitation. Vapor pressure refers to the pressure exerted by a vapor at a state of thermodynamic equilibrium with its corresponding liquid phase at a specific temperature. It represents the tendency of molecules to escape from the fluid surface into the vapor phase.
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
1.5K
Buoyancy and Stability for Submerged and Floating Bodies01:11

Buoyancy and Stability for Submerged and Floating Bodies

2.0K
In fluid mechanics, buoyancy and stability are key concepts for understanding the behavior of submerged and floating bodies. When a stationary body is fully or partially submerged in a fluid, the fluid exerts a force on the body known as the buoyant force. This force acts vertically upward through a point called the center of buoyancy, which is the center of the displaced fluid volume. According to Archimedes' principle, the magnitude of the buoyant force is equal to the weight of the fluid...
2.0K
Vapor Pressure Lowering03:28

Vapor Pressure Lowering

27.8K
The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
 
Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution....
27.8K
Rocket Propulsion In Empty Space - II01:12

Rocket Propulsion In Empty Space - II

3.0K
The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket...
3.0K

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関連する実験動画

Updated: Sep 9, 2025

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
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Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

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カビテーションによる打ち上げ

Dalei Wang1, Zixiao Liu2, Hongping Zhao1

  • 1National Key Laboratory for Development and Utilization of Forest Food Resources, Zhejiang A&F University, Hangzhou, China.

Science (New York, N.Y.)
|August 28, 2025
PubMed
まとめ
この要約は機械生成です。

ミリメートルスケールの装置を 発射するために利用され 高速で効率的な エネルギー伝達を実現します この新しい方法は,装置がジャンプし,泳ぐことを可能にし,アクチュエータとロボティクスの広範な適用性を示しています.

さらに関連する動画

Studying Cavitation Enhanced Therapy
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Studying Cavitation Enhanced Therapy

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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

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関連する実験動画

Last Updated: Sep 9, 2025

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation
14:22

Activating Molecules, Ions, and Solid Particles with Acoustic Cavitation

Published on: April 11, 2014

15.2K
Studying Cavitation Enhanced Therapy
07:36

Studying Cavitation Enhanced Therapy

Published on: April 9, 2021

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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
08:19

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科学分野:

  • 物理学
  • 材料科学
  • ロボット

背景:

  • 液体内の蒸気泡の形成と崩壊は 通常破壊的です
  • しかし,この現象は制御され,機械的な用途に使用することができます.

研究 の 目的:

  • エネルギーの蓄積と 制御された放出のために
  • 微小装置のための新しい推進方法を開発する.

主な方法:

  • 熱した液体でエネルギーを蓄積し 泡の崩壊を抑制する
  • 不安定なカビテーションバブルの 暴力的な崩壊を利用して 力を生み出す
  • 打ち上げと泳ぎの能力のためのミリスケールの装置のテスト.

主要な成果:

  • ミリメートルスケールの装置は12m/sのピーク速度と7.14 × 10^4 m/s^2の加速で1.5メートルのジャンプを達成しました.
  • カビテーションによる打ち上げは,0.64%のエネルギー効率を示した.
  • 装置は水面を12cm/sで泳ぐように推進された.
  • この方法は,様々なデバイスの材料,液体メディア,環境において有効であることが証明されました.

結論:

  • 微小装置に相当な推進力を生み出すために 制御可能なカビテーションを活用できます
  • この技術は新しいアクチュエータとロボットシステムの開発に多用途なプラットフォームを提供します.
  • 証明された性能指標は,空洞化駆動推進の可能性を強調しています.