Journal
PHYSICS OF FLUIDS
Volume 33, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0039525
Keywords
-
Categories
Funding
- LANL PEM Mix Burn Project
Ask authors/readers for more resources
The study revisits coarse-grained simulation strategies for turbulent material mixing involving shock-driven turbulence, using newly available LMC-xRAGE hydrodynamics. Improved simulated mixing and turbulence levels on coarser grids were achieved, with the more accurate models requiring less resolution and resulting in grid-coarsening savings for mixing prediction.
We revisit coarse-grained simulation strategies for turbulent material mixing applications involving shock-driven turbulence in the context of the Radiation Adaptive Grid Eulerian (xRAGE) hydrodynamics and Besnard-Harlow-Rauenzahn (BHR) Reynolds-averaged Navier-Stokes codes, using newly available Low-Mach-Corrected (LMC) xRAGE hydrodynamics. Impact assessments are based on comparisons with a relevant shock-tube experiment for which turbulent mixing and velocity data are available. xRAGE Implicit Large-Eddy Simulation (ILES) and a recently proposed xRAGE-BHR bridging paradigm are tested. Bridging models turbulent stresses dynamically, based on decomposing the full stress into modeled and resolved components, using a differential filter as a secondary filtering operation to define the resolved part, and additionally requiring the resolved stress to approach the full stress with grid resolution refinement to ensure realizability of the bridging-based large-eddy simulation. Much improved scale-resolving with LMC-xRAGE ILES and with dynamic LMC-xRAGE/BHR bridging enables higher simulated mixing and turbulence levels on coarser grids. For the tested planar shock-tube case, the more-accurate models can achieve the same level of accuracy with less resolution than required with the highest-fidelity turbulence simulation models typically used at scale with default xRAGE hydrodynamics; two-levels of grid-coarsening savings can be thus achieved for the mixing prediction in these comparisons: one associated with the more-accurate LMC xRAGE hydrodynamics and an additional one from using the dynamic xRAGE-BHR bridging.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available