Related Experiment Video
Updated: Dec 16, 2025
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
8.9K
Dynamic wetting of solid-liquid-liquid system by molecular kinetic theory
Weibing Tian1, Keliu Wu1, Zhangxin Chen2
1State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, PR China.
Journal of Colloid and Interface Science
|July 5, 2020
Summary
Molecular kinetic theory investigates dynamic wetting in solid-liquid-liquid systems. A new model explains energy dissipation, considering liquid viscosity and solid surface effects for better understanding of wetting phenomena.
Area of Science:
- Physical Chemistry
- Surface Science
- Fluid Dynamics
Background:
- Dynamic wetting in solid-liquid-liquid (SLL) systems is complex.
- Understanding viscosity effects of multiple liquids is crucial for predicting wetting behavior.
Purpose of the Study:
- Investigate dynamic wetting mechanisms in SLL systems using molecular kinetic theory (MKT).
- Analyze the influence of liquid viscosity and solid surface properties on dynamic wetting.
- Develop a new model to explain energy dissipation at the three-phase contact line.
Main Methods:
- Applied molecular kinetic theory (MKT) combined with existing data.
- Analyzed limitations of MKT for dynamic wetting.
- Proposed a coefficient activation free energy model.
Main Results:
- The viscosity effect was categorized into pure liquid zones and a mixing zone.
- The proposed model successfully explains energy dissipation near the three-phase contact line in SLL systems.
- The study highlights the impact of fluid viscosity and solid surface properties on dynamic wetting.
Conclusions:
- The coefficient activation free energy model provides insights into energy dissipation mechanisms in SLL dynamic wetting.
- This research advances the understanding of physical mechanisms governing dynamic wetting.
- The findings are valuable for applications involving complex fluid interfaces.
Related Concept Videos
01:09Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model
669
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
669
01:15Theories of Dissolution: Diffusion Layer Model
1.4K
Dissolution, the process by which drug particles dissolve in a solvent, is explained by the diffusion layer model, a theoretical framework that simulates the absorption of oral drugs and allows us to analyze experimental data.
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
This process starts with a thin layer, saturated with the drug, forming at the interface between the solid and liquid. The solute then diffuses from this layer into the main solution. The Noyes-Whitney equation suggests that the rate of dissolution relies on the diffusion...
1.4K
03:13Intermolecular Forces
67.8K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
67.8K
01:34The Fluid Mosaic Model
175.2K
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
175.2K
01:22Surface Tension of Fluid
1.1K
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...
1.1K
01:27Distribution of Molecular Speeds
5.1K
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...
5.1K