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

Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

349
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
349
Turbulent Flow01:24

Turbulent Flow

286
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
286
Irrotational Flow01:28

Irrotational Flow

565
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
565
Couette Flow01:22

Couette Flow

452
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
452
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

407
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is...
407
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

9.2K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
9.2K

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

Microturbulence Suppression by Alfvén Eigenmodes in the DIII-D Tokamak.

Physical review letters·2026
Same author

Multi-scale Interaction Mechanism for Edge-Localized-Mode Suppression in the Tokamak Edge.

Nature communications·2025
Same author

Layered patterns of active scalar fields in a two-dimensional magnetohydrodynamic system.

Physical review. E·2025
Same author

Staircase resiliency in a fluctuating cellular array.

Physical review. E·2024
Same author

Generation of momentum transport in weakly turbulent β-plane magnetohydrodynamics.

Physical review. E·2023
Same author

How the birth and death of shear layers determine confinement evolution: from the L → H transition to the density limit.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2023

相关实验视频

Updated: Sep 17, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.7K

边缘-核心合通过向内流传播的物理.

Mingyun Cao1, P H Diamond1

  • 1University of California-San Diego, Departments of Physics and Astronomy and Astrophysics, San Diego, California, USA.

Physical review letters
|June 27, 2025
PubMed
概括

由流产生的向内传播的空隙可以为磁性受限的聚变等离子体提供能量. 这种新了解的机制驱动了一个广泛的流层,可能解决等离子体能量短缺问题.

科学领域:

  • 等离子体物理学的物理学
  • 核聚变能源的使用方式
  • 流动力学 流动力学

背景情况:

  • 边缘核心合对于优化磁性封闭的聚变等离子体至关重要.
  • 据推测,向内流的传播会激发边缘核心区域的能量,但机制尚不清楚.
  • 最近的实验观察到在最后一个封闭的流体表面附近的泡泡-空隙对.

研究的目的:

  • 阐明向内空传播的机制及其对等离子体动态的影响.
  • 为了证明空气排放如何在聚变等离子体中驱动流层.
  • 调查切伦科夫辐射在这个过程中的作用.

主要方法:

  • 虚空发射和漂移波相互作用的理论建模.
  • 对泡泡-空隙对的实验观测的分析.
  • 由向内传播的空隙驱动的流层形成的模拟.

主要成果:

  • 虚空排放被确定为广泛的流层 (宽度~100 ρs) 的重要驱动因素.
  • 来自向内传播的空洞的漂移波的切伦科夫辐射是拟议的机制.
  • 这一过程可以动核心等离子体,并激活边缘-核心合区域.

结论:

更多相关视频

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.8K
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

8.6K

相关实验视频

Last Updated: Sep 17, 2025

Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

9.7K
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.8K
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
11:03

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids

Published on: December 4, 2017

8.6K
  • 到目前为止被忽视的空隙发射过程是聚变等离子体边缘-核心合的关键机制.
  • 这个模型为等离子体能量短缺问题提供了潜在的解决方案.
  • 了解空洞动力学对于控制聚变装置中的强流动是必不可少的.