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相关概念视频

Propagation of Waves01:07

Propagation of Waves

2.3K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.3K
Standing Waves01:17

Standing Waves

4.4K
Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...
4.4K
Wave Parameters01:10

Wave Parameters

7.6K
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
7.6K
Travelling Waves01:04

Travelling Waves

5.2K
A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is...
5.2K
Interference and Superposition of Waves01:07

Interference and Superposition of Waves

4.9K
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
4.9K
Equations of Wave Motion01:02

Equations of Wave Motion

5.6K
Mathematically, the motion of a wave can be studied using a wavefunction. Consider a string oscillating up and down in simple harmonic motion, having a period T. The wave on the string is sinusoidal and is translated in the positive x-direction as time progresses. Sine is a function of the angle θ, oscillating between +A and −A and repeating every 2π radians. To construct a wave model, the ratio of the angle θ and the position x is considered.
5.6K

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相关实验视频

Updated: Jun 7, 2025

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

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统一滚动波浪的统一.

Fabien Depoilly1, Séverine Millet1, Hamda Ben Hadid1

  • 1LMFA, UMR5509, CNRS, Ecole Centrale de Lyon, INSA Lyon, Universite Claude Bernard Lyon 1, Villeurbanne, France.

PloS one
|November 19, 2024
PubMed
概括
此摘要是机器生成的。

这项研究为分析广义牛顿流体中的自由表面流动不稳定性提供了一个通用框架. 新的分析表达式准确地预测波速和不稳定值在各种类理学.

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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
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相关实验视频

Last Updated: Jun 7, 2025

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

8.6K
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

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科学领域:

  • 流体动力学 流体动力学
  • 类风病学 类风病学 类风病学
  • 非牛顿流体力学的流体力学.

背景情况:

  • 自由的表面流在工程和自然现象中至关重要.
  • 当惯性力占主导地位时,表面波的不稳定性发生,由雷诺兹数量化.
  • 现有的流体风学模型缺乏稳定性分析的统一框架.

研究的目的:

  • 开发一个通用的框架来分析任何通用的牛顿流体自由表面流动的线性稳定性.
  • 要推导出适用于广泛的流体类型的普遍奥尔-索默菲尔德方程.
  • 为波速和临界雷诺兹数建立新的分析表达式,独立于特定的风湿学模型.

主要方法:

  • 开发新的无维数量来最大限度地减少对质学的依赖.
  • 为一般化的牛顿流体推导奥尔-索默菲尔德稳定性方程.
  • 长波膨胀的应用,以获得波速和临界雷诺兹数的分析表达式.

主要成果:

  • 为波速和临界雷诺兹数得出了一种新的,与学无关的分析表达式.
  • 获得的表达式与剪切稀释,剪切加厚和粘性塑料流体的实验和数值数据进行了验证.
  • 分析结果与现有文献非常一致,证实了它们的准确性和广泛适用性.

结论:

  • 该研究提供了一种统一且计算效率高的方法,用于评估各种流体类型的自由表面流动稳定性.
  • 衍生的分析表达式为预测波浪行为和不稳定值提供了显著的进步.
  • 该框架的弹性延伸到非单调的类型,增强其在各种科学和工程领域的实际实用性.