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Updated: May 23, 2026

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
Published on: September 17, 2021
Molecular dynamics extended for fluctuating networks: application to water
Jennifer M Kashmirian1, Alfred Uhlherr, Alan Dorin
1Monash University, Faculty of Information Technology, Clayton Campus, Bldg. 63, Wellington Road, Clayton 3800, Australia. jenny.kashmirian@gmail.com
A new fluctuating network (FN) algorithm enhances molecular dynamics simulations for understanding water's role in biochemistry. This method accurately models hydrogen bond networks, improving simulations of complex molecular systems.
Area of Science:
- Computational Chemistry
- Biophysics
- Materials Science
Background:
- Molecular simulation models are crucial for understanding water's role in biochemical processes.
- Existing water models struggle to accurately represent hydrogen bond network characteristics.
Purpose of the Study:
- To introduce a novel fluctuating network (FN) algorithm as an advancement to standard molecular dynamics.
- To enhance the simulation of molecular systems with underlying networks, specifically water's hydrogen bond network.
Main Methods:
- Developed a fluctuating network (FN) algorithm extending standard molecular dynamics.
- Applied a potential distinguishing strong and weak network connections.
- Modeled liquid water using a single-site, isotropic, short-range potential.
Main Results:
- Successfully reproduced liquid water's radial distribution function, indicating accurate molecular spacing.
- Characterized dynamic properties: exponential hydrogen bond lifetime distribution, diffusion rate, and average hydrogen bonds per molecule.
- Demonstrated the FN algorithm's capability to simulate networked systems with coordination limits.
Conclusions:
- The FN algorithm offers a robust method for simulating water's hydrogen bond dynamics.
- This approach can be extended to model covalent interactions, reaction dynamics, and cellular networks.
- Provides a new tool for exploring complex networked molecular systems.
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