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Clustering-based Method for Constructing the Phase Diagram of the van der Waals Model Fluid
Dinh Quoc Huy Pham1, Midhun Mohan Anila1, Mateusz Chwastyk1
1Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, Warsaw, 02-668, Poland.
Current Protein & Peptide Science
|June 18, 2025
Summary
Researchers developed a new method using molecular dynamics simulations to create phase diagrams for membraneless organelles. This approach helps understand liquid-liquid phase separation in cellular biology and disease research when equations of state are unknown.
Area of Science:
- Biophysics
- Cellular Biology
- Computational Chemistry
Background:
- Membraneless organelles form via liquid-liquid phase separation, crucial for cellular functions.
- Understanding their formation requires phase diagrams, but traditional methods fail with unknown equations of state.
- This limitation hinders research in cellular biology and disease.
Purpose of the Study:
- To present a novel method for constructing phase diagrams.
- To overcome limitations of existing methods when equations of state are unknown.
- To enable the study of liquid-liquid phase separation in complex biological systems.
Main Methods:
- Utilized the SPACEBALL algorithm and cluster size monitoring.
- Performed molecular dynamics simulations of a van der Waals fluid.
- Analyzed system clustering, density fluctuations, and trajectories.
Main Results:
- Successfully constructed a phase diagram for a monoatomic van der Waals fluid.
- Observed aggregation of particles and changes in system density.
- Demonstrated the ability to determine binodal and spinodal lines.
Conclusions:
- The SPACEBALL-based approach provides alternative methods for locating phase boundaries.
- This method is applicable to protein solutions and other systems lacking validated equations of state.
- Enables phase diagram creation using pure trajectories from molecular dynamics simulations.
Keywords:
Liquid-liquid phase separationSPACEBALL algorithmbinodal and spinodal linesmembraneless organellesmolecular dynamics simulationsphase diagramprotein phase behavior.van der Waals fluidMore Related Videos
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