A Hotspot's Better Half: Non-Equilibrium Intra-Molecular Strain in Shock Physics.
J Phys Chem Lett
; 12(11): 2756-2762, 2021 Mar 25.
Article
em En
| MEDLINE
| ID: mdl-33705143
ABSTRACT
Shockwave interactions with a material's microstructure localizes energy into hotspots, which act as nucleation sites for complex processes such as phase transformations and chemical reactions. To date, hotspots have been described via their temperature fields. Nonreactive, all-atom molecular dynamics simulations of shock-induced pore collapse in a molecular crystal show that more energy is localized as potential energy (PE) than can be inferred from the temperature field and that PE localization persists beyond thermal diffusion. The origin of the PE hotspot is traced to large intramolecular strains, storing energy in modes readily available for chemical decomposition.
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01-internacional
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MEDLINE
Idioma:
En
Revista:
J Phys Chem Lett
Ano de publicação:
2021
Tipo de documento:
Article