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- W4286971363 abstract "We have developed a Python-based open-source package to analyze the results stemming from ab initio molecular-dynamics simulations of fluids. The package is best suited for applications on natural systems, like silicate and oxide melts, water-based fluids, and various supercritical fluids. The package is a collection of Python scripts that include two major libraries dealing with file formats and with crystallography. All the scripts are run at the command line. We propose a simplified format to store the atomic trajectories and relevant thermodynamic information of the simulations, which is saved in UMD files, standing for Universal Molecular Dynamics. The UMD package allows the computation of a series of structural, transport and thermodynamic properties. Starting with the pair-distribution function it defines bond lengths, builds an interatomic connectivity matrix, and eventually determines the chemical speciation. Determining the lifetime of the chemical species allows running a full statistical analysis. Then dedicated scripts compute the mean-square displacements for the atoms as well as for the chemical species. The implemented self-correlation analysis of the atomic velocities yields the diffusion coefficients and the vibrational spectrum. The same analysis applied on the stresses yields the viscosity. The package is available via the GitHub website and via its own dedicated page of the ERC IMPACT project as open-access package." @default.
- W4286971363 created "2022-07-25" @default.
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- W4286971363 date "2021-09-17" @default.
- W4286971363 modified "2023-09-30" @default.
- W4286971363 title "Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package" @default.
- W4286971363 doi "https://doi.org/10.3791/61534-v" @default.
- W4286971363 hasPublicationYear "2021" @default.
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