Molecular dynamics predictions of viscosity for organophosphorus liquids

Ella V. Ivanova, Gennady Y. Gor

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

When studying physical properties of highly toxic chemicals, such as chemical warfare agents (CWAs), molecular dynamics (MD) simulations can serve as an alternative to experimental measurements. We performed MD simulations to calculate viscosity of four organophosphorus liquids, CWAs, sarin, and soman, as well as their simulants, DMMP and DIMP, in the temperature range from 0 to (Formula presented.). The molecules were represented with Transferable Potentials for Phase Equilibria United Atom (TraPPE-UA) force field; the calculations were performed using the Green–Kubo method. The results for sarin and DMMP are in good agreement with previously published experimental data, which justifies the use of the TraPPE-UA force field for other organophosphorus compounds. Therefore we predicted viscosity of DIMP and soman, for which the experimental data were unavailable. Our results suggest that for applications where liquid viscosity is important, DMMP is a suitable simulant for sarin, and DIMP is a suitable simulant for soman.

Original languageEnglish (US)
Article numbere18235
JournalAIChE Journal
Volume69
Issue number12
DOIs
StatePublished - Dec 2023

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • General Chemical Engineering

Keywords

  • computer simulations (MC and MD)
  • fluid mechanics
  • liquids
  • molecular
  • simulation
  • thermodynamics/statistical

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