Bulletin of the American Physical Society
71st Annual Meeting of the APS Division of Fluid Dynamics
Volume 63, Number 13
Sunday–Tuesday, November 18–20, 2018; Atlanta, Georgia
Session M03: Compressible Flows: General
8:00 AM–9:44 AM,
Tuesday, November 20, 2018
Georgia World Congress Center
Room: B204
Chair: Suman Muppidi, NASA Ames
Abstract ID: BAPS.2018.DFD.M03.3
Abstract: M03.00003 : Energetic Dispersal of a Carefully Perturbed Bed of Particles*
8:26 AM–8:39 AM
Presenter:
Frederick Ouellet
(Univeristy of Florida)
Authors:
Frederick Ouellet
(Univeristy of Florida)
Rahul Babu Koneru
(University of Florida)
Joshua R Garno
(University of Florida)
Bertrand Rollin
(Embry-Riddle Univ)
S Balachandar
(University of Florida)
Accurate characterization of the evolution of a particle cloud following interactions with detonation waves and contact interfaces is a challenging problem for simulations and experiments. In experiments, precise descriptions of the initial states of the explosive and the surrounding particle bed are hard to achieve. Also, diagnostic tools and data for early times following detonation are limited. In simulations, modeling the particle compaction regime is difficult and the uncertainties of other physical models are hard to quantify under extreme conditions. This work makes use of Eulerian-Lagrangian, compressible flow simulations to analyze the effects of carefully designed perturbations to a uniformly distributed but initially low volume fraction particle bed surrounding an explosive. The analysis focuses on the sequence of events, multiphase instabilities and late time behavior displayed by the particle cloud. Inspired by behaviors of two-fluid instabilities, increasingly complex perturbations are used to unravel the effects of the initial particle distribution.
*This work was supported by the U.S. D.O.E., N.N.S.A., Advanced Simulation and Computing Program, as a Cooperative Agreement under the Predictive Science Academic Alliance Program, Contract No. DE-NA0002378.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DFD.M03.3
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