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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

DOI:
10.3791/61534-v

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06:37 min

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September 17, 2021

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, , , , ,
1Ecole Normale Supérieure de Lyon, Laboratory of Geology of Lyon UMR5276,CNRS, 2Centre for Earth Evolution and Dynamics (CEED),University of Oslo, 3CEA, DAM, DIF

Capitoli

  • 00:05Introduction
  • 00:24Analysis of the Molecular-dynamics Runs
  • 01:15Perform the Structural Analysis
  • 02:05Perform the Speciation Analysis
  • 02:51Compute Diffusion Coefficients
  • 03:27Time Correlation Functions
  • 04:04Thermodynamic Parameters Stemming from the Simulations
  • 04:29Results: Lifetime of the Si-O Chemical Species
  • 05:59Conclusion

Summary

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Melts and fluids are ubiquitous vectors of mass transport in natural systems. We have developed an open-source package to analyze ab initio molecular-dynamics simulations of such systems. We compute structural (bonding, clusterization, chemical speciation), transport (diffusion, viscosity) and thermodynamic properties (vibrational spectrum).

Tags

Keywords: Ab Initio Molecular DynamicsUMD PackagePhysical PropertiesChemical PropertiesFluidsPython ScriptsMD SimulationVASPPair Distribution FunctionInteratomic Bond DistancesCoordination PolyhedraPolymerizationMean Square DisplacementSelf-diffusivityDiffusion Coefficients

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