A Phonon Boltzmann Study of Microscale Thermal Transport in $\alpha$-RDX Cook-Off
Abstract
The microscale thermal transport properties of RDX are believed to be major factors in the initiation process. In this study we present a thorough examination of phonon properties which dominate energy storage and transport in RDX. The phonon lifetimes are determined for all phonon branches, revealing the characteristic time scale of energy transfer amongst phonon modes. The phonon parameters also serve as inputs to a full Brillouin zone three dimensional phonon transport simulation in the presence of a hotspot. In addition to identifying the phonon mode contributions to thermal transport, and as N-N bond breaking is integral to disassociation, we identify phonon modes corresponding to large N-N bond stretch analyzing the manner in which these modes store and transfer energy.
Cite
@article{arxiv.1808.08295,
title = {A Phonon Boltzmann Study of Microscale Thermal Transport in $\alpha$-RDX Cook-Off},
author = {Francis G. VanGessel and Gaurav Kumar and Daniel C. Elton and Peter W. Chung},
journal= {arXiv preprint arXiv:1808.08295},
year = {2018}
}
Comments
Preprint for publication in the Proceedings of the 16th International Detonation Symposium