Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

28.5K
Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...
28.5K
Distribution of Molecular Speeds01:27

Distribution of Molecular Speeds

3.8K
The motion of molecules in a gas is random in magnitude and direction for individual molecules, but a gas of many molecules has a predictable distribution of molecular speeds. This predictable distribution of molecular speeds is known as the Maxwell-Boltzmann distribution. The distribution of molecular speeds in liquids is comparable to that of gases but not identical and can help to understand the phenomenon of the boiling and vapor pressure of a liquid. Consider that a molecule requires a...
3.8K
Maxwell-Boltzmann Distribution: Problem Solving01:20

Maxwell-Boltzmann Distribution: Problem Solving

1.4K
Individual molecules in a gas move in random directions, but a gas containing numerous molecules has a predictable distribution of molecular speeds, which is known as the Maxwell-Boltzmann distribution, f(v).
This distribution function f(v) is defined by saying that the expected number N (v1,v2) of particles with speeds between v1 and v2 is given by
1.4K
Physical Principles Governing Gas Exchange01:16

Physical Principles Governing Gas Exchange

1.6K
Gas behavior plays a vital role in understanding bodily processes such as external and internal respiration. External respiration involves the diffusion of oxygen into the blood and carbon dioxide out of it in the lungs. In contrast, internal respiration happens in body tissues, where these gases move in opposite directions.
Gas Laws Governing Respiration
The behavior of gases is guided by Dalton's Law of partial pressures and Henry's Law.
Dalton's Law asserts that the total...
1.6K
Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation04:01

Real Gases: Effects of Intermolecular Forces and Molecular Volume Deriving Van der Waals Equation

34.3K
Thus far, the ideal gas law, PV = nRT, has been applied to a variety of different types of problems, ranging from reaction stoichiometry and empirical and molecular formula problems to determining the density and molar mass of a gas. However, the behavior of a gas is often non-ideal, meaning that the observed relationships between its pressure, volume, and temperature are not accurately described by the gas laws. 
34.3K
Mean free path and Mean free time01:22

Mean free path and Mean free time

3.3K
Consider the gas molecules in a cylinder. They move in a random motion as they collide with each other and change speed and direction. The average of all the path lengths between collisions is known as the "mean free path."
3.3K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Shaping chaos in bilayer graphene cavities.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Chronic heart failure detection based on long-term RR interval dynamics.

Journal of electrocardiology·2026
Same author

Detecting sleep apnea using non-linear measures of heart rate variability.

Respiratory research·2026
Same author

Performance of the 12-lead ECG in predicting short- and long-term risk of sudden cardiac death.

NPJ digital medicine·2026
Same author

Dynamical cross-correlations between RR and QT intervals in long-term electrocardiogram recordings.

Scientific reports·2026
Same author

Diffusion in the inverted triangular soft Lorentz gas.

Physical review. E·2025

相关实验视频

Updated: May 27, 2025

The Diffusion of Passive Tracers in Laminar Shear Flow
08:01

The Diffusion of Passive Tracers in Laminar Shear Flow

Published on: May 1, 2018

8.5K

在方形软洛伦茨气体中异常扩散.

Esko Toivonen1, Joni Kaipainen1,2, Matti Molkkari1

  • 1Tampere University, Computational Physics Laboratory, P.O. Box 600, FI-33014 Tampere, Finland.

Physical review. E
|February 20, 2025
PubMed
概括

我们研究了方形软洛伦茨气体中的粒子扩散,发现它可以是正常的或异常的. 异常扩散来自于准弹道轨道,与硬墙系统不同.

更多相关视频

Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels
11:34

Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels

Published on: September 8, 2016

10.2K
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.3K

相关实验视频

Last Updated: May 27, 2025

The Diffusion of Passive Tracers in Laminar Shear Flow
08:01

The Diffusion of Passive Tracers in Laminar Shear Flow

Published on: May 1, 2018

8.5K
Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels
11:34

Controlled Synthesis and Fluorescence Tracking of Highly Uniform PolyN-isopropylacrylamide Microgels

Published on: September 8, 2016

10.2K
In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

6.3K

科学领域:

  • 统计物理 统计物理
  • 动态系统 动态系统
  • 计算物理 计算物理

背景情况:

  • 了解粒子扩散在各种物理系统中至关重要.
  • 从硬壁潜力过渡到软潜力显著影响扩散动态.
  • 方形软洛伦茨气体模型为研究这些效应提供了一个独特的平台.

研究的目的:

  • 分析二维方形软洛伦茨气体中的粒子异常扩散特性.
  • 根据系统参数,研究正常和异常扩散之间的相互作用.
  • 描述控制扩散过渡的动态系统属性.

主要方法:

  • 在2D系统中对点状粒子进行数值模拟,使用圆形散射器.
  • 开发一个单元细胞跳跃模型,用于正常的扩散模式.
  • 分析粒子移位矢量分布和相位空间结构.

主要成果:

  • 观察到正常和异常扩散的丰富相互作用,取决于系统参数.
  • 确定了准弹道轨道和Kolmogorov-Arnold-Moser岛屿,以异常扩散为特征.
  • 在位移分布与硬壁洛伦茨气体的相似之处,具有高斯行为或长尾.

结论:

  • 方形软洛伦兹气体表现出复杂的扩散行为,包括异常扩散.
  • 参数空间分析揭示了影响扩散模式的复杂结构.
  • 这项研究对理解从硬到软潜力的扩散变化的关键性质进行了目录.