Related Experiment Video
Updated: May 20, 2025
07:08
Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films
Published on: August 18, 2018
7.4K
Disintegration Behavior of Droplets Impacting Hydrophilic Fibers
Ledong Deng1, Song-Chuan Zhao1
1State Key Laboratory for Strength and Vibration of Mechanical Structures, International Center for Applied Mechanics, School of Aerospace Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|May 16, 2025
Summary
This study reveals two droplet disintegration patterns on fibers: T-shaped and wing-like. Contrary to expectations, high viscosity and surface roughness can enhance wing-like disintegration, challenging prior assumptions.
Area of Science:
- Fluid dynamics
- Surface science
Background:
- Droplet disintegration on cylindrical objects is crucial for many industrial applications.
- Understanding droplet-fiber interactions is essential for optimizing processes like coating and spraying.
Purpose of the Study:
- To investigate droplet impact dynamics on hydrophilic cylindrical glass fibers.
- To identify and characterize different droplet disintegration patterns.
- To explore the influence of liquid viscosity, surface roughness, and surface tension on these patterns.
Main Methods:
- High-speed imaging was employed to capture droplet impact events.
- Experiments were conducted by varying liquid viscosity, surface roughness, and surface tension.
- Regime maps were constructed to delineate different disintegration behaviors.
Main Results:
- Two distinct disintegration patterns were observed: T-shaped (novel, low viscosity) and wing-like (higher viscosity).
- Wing-like disintegration was enhanced by increased viscosity and surface roughness, challenging existing theories.
- A theoretical model based on Plateau-Rayleigh theory was developed for surface tension effects.
Conclusions:
- Droplet disintegration on fibers is complex and not solely dependent on low viscosity or hydrophobicity.
- Surface roughness can significantly influence disintegration, mimicking increased liquid viscosity.
- The findings provide new insights into droplet-fiber interactions and inform future applications.
Related Concept Videos
01:15Hydrolysis
103.8K
Overview
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
Hydrolysis is a chemical reaction in which the addition of water breaks down a polymer into its simpler monomer units. For example, peptides break into amino acids, carbohydrates into simple sugars, and DNA into nucleotides. Enzymes often facilitate these processes.
Hydrolysis Reverses Dehydration Synthesis
Complex carbohydrates can be broken down by breaking the bonds between individual sugar units. The reaction breaks a glycosidic bond as water is added to the compound. The...
103.8K
01:22Surface Tension of Fluid
199
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...
199
03:00Solubility
17.2K
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules,...
17.2K
03:22Colloids
17.2K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.2K
01:07Cohesion
50.3K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
50.3K
01:20Mass Spectrometry: Molecular Fragmentation Overview
2.8K
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can...
2.8K