相关实验视频
Updated: Jun 26, 2025
08:45
Glass-Based Devices to Generate Drops and Emulsions
Published on: April 5, 2022
2.7K
液体从喷嘴自动喷射出来
Fang Shan1, Zhenhua Chai1,2,3, Baochang Shi1,2,3
1School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074, China.
Physical review. E
|May 17, 2024
概括
这项研究开发了一个理论模型和一个格子博尔兹曼方法来模拟液体自动喷射喷嘴. 这些发现为滴滴形成提供了洞察力,并有助于设计滴滴喷射器.
科学领域:
- 流体动力学 流体动力学
- 计算物理学的计算物理.
- 微流体学 微流体学
背景情况:
- 液体的自动喷射是一种复杂的现象,对工程应用至关重要.
- 它涉及复杂的过程,如接口移动,变形和喷气破裂.
研究的目的:
- 在喷嘴出口获得半径的理论速度,以分析自动弹射的关键条件.
- 提出和验证一个晶格博尔兹曼 (LB) 方法来模拟液体喷射自排.
- 调查各种参数对自动喷射过程的影响.
主要方法:
- 在喷嘴出口时的阴茎速度的理论推导.
- 开发和应用一个一致和保守的轴对称格子博尔茨曼 (LB) 方法.
- 数字模拟用于对理论和实验数据验证LB模型.
主要成果:
- 拟议的LB模型与理论和实验结果有很好的一致性.
- 观察到明显的现象,如半径变形,毛细血管结和滴滴断.
- 该研究分析了收缩比,长度比,接触角度和喷嘴结构的影响.
结论:
- 开发的LB方法准确地模拟了液体自排过程.
- 这些发现为滴滴喷射动态提供了宝贵的见解.
- 结果可以指导滴滴喷射器的设计,并提高对微重力喷射的理解.
相关概念视频
01:12Design Example: Flow Through a Fire Extinguisher
136
A fire extinguisher that uses pressurized water relies on fluid dynamics principles to generate a high-velocity stream capable of suppressing flames. The water is stored at a much higher pressure inside the extinguisher than the surrounding atmosphere. This pressure difference forces the water to flow rapidly when the extinguisher is activated, and the behavior of the water as it exits the nozzle can be understood using fundamental equations of fluid dynamics.
The key to understanding how the...
The key to understanding how the...
136
01:14Free Jet
153
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:
153
01:04Pascal's Law
8.5K
In 1653, the French philosopher and scientist Blaise Pascal published "Treatise on the Equilibrium of Liquids," which discussed the principles of static fluids. A static fluid is a fluid that is not in motion. When a fluid is not flowing, we say that the fluid is in static equilibrium. If the fluid is water, we say it is in hydrostatic equilibrium. For a fluid in static equilibrium, the net force on any part of the fluid must be zero; otherwise, the fluid will start to flow. Pascal...
8.5K
01:17Bernoulli's Principle: Applications
3.7K
There are many devices and situations in which fluid flows at a constant height and so can be analyzed using Bernoulli's principle. These devices include, but are not limited to, entrainment devices and fluid flow measuring devices.
Entrainment devices use a high fluid speed to create low pressures and, thus, entrain one fluid into another. Some examples of these devices are given below:
Entrainment devices use a high fluid speed to create low pressures and, thus, entrain one fluid into another. Some examples of these devices are given below:
3.7K
01:17Accelerating Fluids
1.0K
When a fluid is in constant acceleration, the pressure and buoyant force equations are modified. Suppose a beaker is placed in an elevator accelerating upward with a constant acceleration, a. In the beaker, assume there is a thin cylinder of height h with an infinitesimal cross-sectional area, ΔS.
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
The motion of the liquid within this infinitesimal cylinder is considered to obtain the pressure difference. Three vertical forces act on this liquid:
1.0K