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A Phase-Field Model for Wet Snow Metamorphism.
1Department of Mechanical and Civil Engineering, California Institute of Technology, Pasadena, California 91125-0002, United States.
Crystal Growth & Design
|November 7, 2024
Summary
This study introduces a pore-scale phase-field model for wet snow metamorphism, simulating ice, water, and vapor interactions. The model reveals how humidity, temperature, and melt content influence snow microstructure dynamics.
Area of Science:
- Physics
- Earth Science
- Materials Science
Background:
- Snow microstructure dictates key properties like strength and reflectivity.
- Snow metamorphism, driven by environmental gradients, continuously alters snow structure.
- Wet snow metamorphism involves complex phase transitions between ice, liquid water, and water vapor near melting point.
Purpose of the Study:
- To develop a pore-scale phase-field model for wet snow metamorphism.
- To simulate and analyze the simultaneous phase changes: sublimation, evaporation, and melting.
- To investigate the influence of environmental factors on snow microstructure evolution.
Main Methods:
- Proposed a novel three-phase (ice-water-vapor) pore-scale phase-field model.
- Formulation allows tracking temperature and water vapor concentration.
- Validated by recovering two-phase models when a phase is absent.
Main Results:
- 2D simulations demonstrate the impact of humidity and temperature on pore-scale wet snow metamorphism dynamics.
- Liquid melt content's role in controlling metamorphism dynamics was explored, contrasting with dry snow.
- The model successfully captures phase transitions and their effect on snow structure.
Conclusions:
- The developed phase-field model accurately simulates wet snow metamorphism.
- Environmental factors significantly influence snow microstructure evolution at the pore scale.
- The model offers a foundation for studying water phase transitions in various systems.
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