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Published in:
2019 | OriginalPaper | Chapter
Interaction of a Blast Wave with a Material Interface
Authors : Eric Johnsen, M. T. Henry de Frahan
Published in: 31st International Symposium on Shock Waves 1
Publisher: Springer International Publishing
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Abstract
Hydrodynamic instabilities are important drivers of mixing in many engineering applications and physical phenomena. Blast waves, e.g., originating from explosions in these systems, interact with interfaces between materials of different densities. This interaction deposits baroclinic vorticity along the interface, leading to characteristic rollups and late-time mixing of the materials. As opposed to instabilities driven by a shock wave (Richtmyer-Meshkov) or constant acceleration (Rayleigh-Taylor), the blast wave exhibits a complex acceleration history due to the combination of the leading shock and the following rarefaction. In addition to the induced interface acceleration, the shock and rarefaction compress and decompress the material, further modifying the perturbation growth. Finally, after the blast-wave interaction with the interface, residual circulation at the interface continues to drive the perturbation growth.