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 effective strategy to capture the dominating effects of convectively driven flow instabilities. We evaluate the impact of three distinct numerical strategies in simulations of transition and turbulence decay with ILES: the Harten–Lax–van Leer (HLL) Riemann solver applying Strang splitting and a Lagrange-plus-Remap formalism to solve the directional sweep—denoted split; the Harten–Lax–Van Leer-Contact (HLLC) Riemann solver using a directionally unsplit strategy and parabolic reconstruction—denoted unsplit; and the HLLC Riemann solver using unsplit and a low-Ma correction (LMC)—denoted unsplit*. Three case studies are considered: (1) a shock tube problem prototyping shock-driven turbulent mixing, (2) the Taylor–Green Vortex (TGV) prototyping transition to turbulence, and, (3) an homogeneous isotropic turbulence (HIT) case, focusing on the impact of discretization on transition and decay from fixed well-characterized initial conditions. Significantly more accurate predictions are provided by the unsplit schemes, in particular, when augmented with the LMC. For given resolution, only the unsplit schemes predict the turbulent mixing transition after reshock observed in the shock tube experiments. Relevant comparisons of ILES based on Euler and Navier–Stokes equations addressing potential occurrence of low-Re regimes in the applications are presented. Unsplit* schemes are instrumental in allowing to capture the spatial development of the TGV flow and its validation at prescribed Re with significantly less resolution. HIT analysis confirms higher simulated turbulence Re and increased small-scale content associated with the unsplit discretizations.
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March 2021
Research Article|
March 09 2021
Impact of numerical hydrodynamics in turbulent mixing transition simulations
Special Collection:
Interfaces and Mixing, and Beyond
F. F. Grinstein
;
F. F. Grinstein
a)
Los Alamos National Laboratory, X-Computational Physics Division
, Los Alamos, New Mexico 87545, USA
a)Author to whom correspondence should be addressed: fgrinstein@lanl.gov
Search for other works by this author on:
F. S. Pereira
F. S. Pereira
Los Alamos National Laboratory, X-Computational Physics Division
, Los Alamos, New Mexico 87545, USA
Search for other works by this author on:
a)Author to whom correspondence should be addressed: fgrinstein@lanl.gov
Note: This paper is part of the special topic, Interfaces and Mixing, and Beyond.
Physics of Fluids 33, 035126 (2021)
Article history
Received:
December 04 2020
Accepted:
January 26 2021
Citation
F. F. Grinstein, F. S. Pereira; Impact of numerical hydrodynamics in turbulent mixing transition simulations. Physics of Fluids 1 March 2021; 33 (3): 035126. https://doi.org/10.1063/5.0034983
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