实验调查液体大理石在撞击水友表面时的反弹动态
Mohammad Javad Akbari1, Mohammad Ali Bijarchi1, Mohammad Behshad Shafii2
1Center of Excellence in Energy Conversion (CEEC), Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
Journal of colloid and interface science
|February 17, 2024
概括
这项研究研究了液体大理石在水友表面上反弹,揭示了能量转换和参数效应. 液体大理石的动态是由韦伯和邦德数的特征,在不同的韦伯数中观察到不同的行为.
科学领域:
- 流体动力学 流体动力学
- 表面科学是一门科学.
- 材料科学 是一种材料科学.
背景情况:
- 液体大理石,水颗粒封装的液滴,在水友表面表现出独特的反弹行为.
- 液体大理石反弹的物理原理,涉及液体核心,粒子和空气之间的相互作用,是复杂的和研究不足的.
- 之前的研究还没有广泛探讨引力Bond数对液体大理石撞击动态的影响.
研究的目的:
- 首次实验性地研究液体大理石在水友表面上的冲击和反弹.
- 分析液体大理石撞击时的能量转换 (动力,重力潜力,惯性,表面).
- 检查韦伯 (We) 和引力邦德 (Bo) 数对弹跳特性的影响.
主要方法:
- 对液体大理石撞击和反弹在水友表面的实验性审查.
- 对韦伯和邦德数的系统变化,以观察它们的影响.
- 测量参数,包括反弹时间,扩散时间,扩散比率,延长比率和恢复系数.
主要成果:
- 液体大理石的反弹动力学受到韦伯和邦德数的重大影响.
- 在撞击过程中对能量转换路径进行了详尽的调查.
- 在低与中等的韦伯数中观察到跳跃时间,扩散时间和扩散比率的不同行为.
- 恢复系数显示了一个关键的韦伯数 (Wecr) 依赖,在它上面下降.
- 最大延长比率与韦伯数线性增加.
结论:
- 这项研究为液体大理石反弹的物理提供了新的见解.
- 基于实验数据和关键参数的规模分析,提出了无维相关性.
- 这些发现强调了韦伯和邦德数在决定液体大理石冲击和反弹结果方面的关键作用.
相关概念视频
Surface Tension of Fluid
283
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
Surface tension varies...
283
Elastic Collisions: Case Study
14.1K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
14.1K
Surface Tension and Surface Energy
1.4K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
1.4K
Surface Tension, Capillary Action, and Viscosity
27.8K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.8K
Viscosity
5.9K
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
5.9K


