Related Experiment Video
Updated: May 6, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
7.6K
Coarse graining for the phase-field model of fast phase transitions
1Departament de Física, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain.
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 16, 2013
Summary
This study analytically treats fast phase transitions lacking local thermalization. Non-Markovian master equations are derived for rapid processes, providing a basis for phase-field models in nonequilibrium systems.
Area of Science:
- Physics
- Physical Chemistry
- Materials Science
Background:
- Fast phase transitions occur in systems far from equilibrium.
- Local thermalization is often assumed but may not hold during rapid processes.
- Existing models may not fully capture the dynamics of rapid phase changes.
Purpose of the Study:
- To analytically investigate fast phase transitions under conditions of limited local thermalization.
- To derive master equations for systems undergoing rapid phase changes without sufficient time for thermalization.
- To provide a theoretical foundation for phase-field models in analyzing highly nonequilibrium systems.
Main Methods:
- Analytical treatment of fast phase transitions.
- Derivation of non-Markovian master equations.
- Focus on processes lacking energy or momentum thermalization.
Main Results:
- Developed non-Markovian master equations applicable to fast phase transitions.
- Demonstrated that these equations account for the lack of local thermalization.
- Established a physical basis for evolution and transport equations within phase-field models.
Conclusions:
- The derived non-Markovian master equations offer a more accurate description of fast phase transitions.
- These equations are crucial for understanding and modeling rapid phase changes in highly nonequilibrium systems.
- Provides enhanced theoretical underpinnings for phase-field modeling in materials science and physics.
More Related Videos
08:55Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
8.2K
09:00Visualization of Failure and the Associated Grain-Scale Mechanical Behavior of Granular Soils under Shear using Synchrotron X-Ray Micro-Tomography
Published on: September 29, 2019
12.0K
Related Concept Videos
02:31Phase Transitions
19.1K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
19.1K
01:21Phase Transitions
130
A phase transition is the process in which a substance changes from one state of matter to another, like from a solid to a liquid, liquid to gas, or vice versa, at a specific temperature and under given pressure conditions. This change is spontaneous and is affected by alterations in temperature and pressure. These parameters impact the strength of the forces between molecules (intermolecular forces) in the substance.During a phase transition, both the initial and final phases of the substance...
130
02:33Phase Transitions: Sublimation and Deposition
16.0K
Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
16.0K
02:39Phase Transitions: Melting and Freezing
11.7K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
11.7K
02:39Phase Transitions: Vaporization and Condensation
17.0K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
17.0K
01:19Phase Diagram
5.9K
The phase of a given substance depends on the pressure and temperature. Thus, plots of pressure versus temperature showing the phase in each region provide considerable insights into the thermal properties of substances. Such plots are known as phase diagrams. For instance, in the phase diagram for water (Figure 1), the solid curve boundaries between the phases indicate phase transitions (i.e., temperatures and pressures at which the phases coexist).
5.9K