Rayleigh–Taylor and Richtmyer–Meshkov instabilities: a journey through scales

Y Zhou, RJR Williams, P Ramaprabhu, M Groom… - Physica D: Nonlinear …, 2021 - Elsevier
Hydrodynamic instabilities such as Rayleigh–Taylor (RT) and Richtmyer–Meshkov (RM)
instabilities usually appear in conjunction with the Kelvin–Helmholtz (KH) instability and are …

Modeling and simulation of transitional Taylor-Green vortex flow with partially averaged Navier-Stokes equations

FS Pereira, FF Grinstein, DM Israel, R Rauenzahn… - Physical Review …, 2021 - APS
The partially averaged Navier-Stokes (PANS) equations model is used to predict the
transitional Taylor-Green vortex (TGV) flow at Reynolds number 3000. A form of the closure …

Impact of numerical hydrodynamics in turbulent mixing transition simulations

FF Grinstein, FS Pereira - Physics of Fluids, 2021 - pubs.aip.org
Underresolved simulations are unavoidable in high Reynolds (Re) and Mach (Ma) number
turbulent flow applications at scale. Implicit large-Eddy simulation (ILES) often becomes the …

Modeling and simulation of transitional Rayleigh–Taylor flow with partially averaged Navier–Stokes equations

FS Pereira, FF Grinstein, DM Israel, R Rauenzahn… - Physics of …, 2021 - pubs.aip.org
The partially averaged Navier–Stokes (PANS) equations are used to predict the variable-
density Rayleigh–Taylor (RT) flow at Atwood number 0.5 and maximum Reynolds number …

Partially averaged Navier-Stokes closure modeling for variable-density turbulent flow

FS Pereira, FF Grinstein, DM Israel, R Rauenzahn… - Physical Review …, 2021 - APS
This work extends the framework of the partially averaged Navier-Stokes (PANS) equations
to variable-density flow, ie, multimaterial and/or compressible mixing problems with density …

Verification and validation: The path to predictive scale-resolving simulations of turbulence

FS Pereira, FF Grinstein… - Journal of …, 2022 - asmedigitalcollection.asme.org
This work investigates the importance of verification and validation (V&V) to achieve
predictive scale-resolving simulations (SRSs) of turbulence, ie, computations capable of …

Transition to Turbulence in ICF Capsule Implosions

FF Grinstein, V Chiravalle, BM Haines… - ICHMT DIGITAL …, 2023 - dl.begellhouse.com
We simulate the indirect-drive National Ignition Facility cryogenic capsule experiment,
N170601, requiring multi-group radiation diffusion to transport x-ray energy from the …

Numerical approximations formulated as LES models

FF Grinstein, FS Pereira, WJ Rider - Numerical Methods in Turbulence …, 2023 - Elsevier
Underresolved simulations are typically unavoidable in high Reynolds (Re) and Mach (Ma)
number turbulent flow applications at scale. Implicit Large-Eddy Simulation (ILES) often …

Partially averaged Navier-Stokes closure modeling for variable-density turbulent flow

FM Soares Pereira, F Grinstein, DM Israel… - Physical Review Fluids …, 2021 - osti.gov
We report this work extends the framework of the partially averaged Navier-Stokes (PANS)
equations to variable-density flow, ie, multimaterial and/or compressible mixing problems …