ls1 mardyn: The Massively Parallel Molecular Dynamics Code for Large Systems.

Area of Science:

• Computational Physics
• Materials Science
• Chemistry

Background:

• Molecular dynamics simulations are crucial for understanding material properties at the atomic level.
• Existing simulation codes often face limitations in scalability and the size of systems they can handle.
• Bridging the gap between atomistic simulations and macroscopic phenomena requires efficient computational tools.

Purpose of the Study:

• To present the LS1 mardyn code, a novel molecular dynamics simulation software.
• To highlight its capabilities in handling large-scale simulations and complex physical models.
• To demonstrate its potential for advancing research in various scientific domains.

Main Methods:

• Development of a highly scalable code optimized for massively parallel supercomputing architectures.
• Implementation of an efficient dynamic load balancing scheme for heterogeneous configurations.
• Support for multicenter rigid potential models including Lennard-Jones sites, point charges, and higher-order polarities.

Main Results:

• LS1 mardyn achieves world-record performance for the largest molecular simulations, exceeding four trillion particles.
• The code demonstrates high scalability and efficiency, even for complex system setups.
• It enables simulations on length and time scales previously inaccessible to molecular dynamics.

Conclusions:

• LS1 mardyn is a powerful and versatile tool for large-scale molecular dynamics simulations.
• Its modular design allows for future extensions and adaptation to new physical models and algorithms.
• Potential applications span complex geometries, interfacial phenomena, and non-equilibrium processes like heat and mass transfer.