Journal article
Three-dimensional simulations of void collapse in energetic materials
Physical review fluids, Vol.3(3), 033201
03/2018
DOI: 10.1103/PhysRevFluids.3.033201
Abstract
The collapse of voids in porous energetic materials leads to hot-spot formation and reaction initiation. This work advances the current knowledge of the dynamics of void collapse and hot-spot formation using 3D reactive void collapse simulations in HMX. Four different void shapes, i.e., sphere, cylinder, plate, and ellipsoid, are studied. For all four shapes, collapse generates complex three-dimensional (3D) baroclinic vortical structures. The hot spots are collocated with regions of intense vorticity. The differences in the vortical structures for the different void shapes are shown to significantly impact the relative sensitivity of the voids. Voids of high surface area generate hot spots of greater intensity; intricate, highly contorted vortical structures lead to hot spots of corresponding tortuosity and therefore enhanced growth rates of reaction fronts. In addition, all 3D voids are shown to be more sensitive than their two-dimensional (2D) counterparts. The results provide physical insights into hot-spot formation and growth and point to the limitations of 2D analyses of hot-spot formation.
Details
- Title: Subtitle
- Three-dimensional simulations of void collapse in energetic materials
- Creators
- Nirmal Kumar RaiH. S Udaykumar
- Resource Type
- Journal article
- Publication Details
- Physical review fluids, Vol.3(3), 033201
- DOI
- 10.1103/PhysRevFluids.3.033201
- ISSN
- 2469-990X
- eISSN
- 2469-990X
- Grant note
- DOI: 10.13039/100000181, name: Air Force Office of Scientific Research, award: FA9550-15-1-0332
- Language
- English
- Date published
- 03/2018
- Academic Unit
- IIHR--Hydroscience and Engineering; Injury Prevention Research Center; Mechanical Engineering
- Record Identifier
- 9984121963702771
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