Initial conditions and modeling for simulations of shock driven turbulent material mixing
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The simulation of shock-driven material mixing driven by flow instabilities and initial conditions (IC) was our focus. Beyond complex multi-scale resolution issues of shocks and variable density turbulence, me must address the equally difficult problem of predicting flow transition promoted by energy deposited at the material interfacial layer during the shock interface interactions. Transition involves unsteady large-scale coherent-structure dynamics capturable by a large eddy simulation (LES) strategy, but not by an unsteady Reynolds-Averaged Navier–Stokes (URANS) approach based on developed equilibrium turbulence assumptions and single-point-closure modeling. Lastly, on the engineering end of computations, such URANS with reduced 1D/2D dimensionality and coarser grids, tend to be preferred for faster turnaround in full-scale configurations.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-06NA25396
- OSTI ID:
- 1334152
- Alternate ID(s):
- OSTI ID: 1338772; OSTI ID: 1419378
- Report Number(s):
- LA-UR-16-24319; LA-UR-16-21324
- Journal Information:
- Computers and Fluids, Journal Name: Computers and Fluids; ISSN 0045-7930
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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