LES of the Narrowband Richtmyer-Meshkov Instability

A Large-Eddy-Simulation of a shock-induced compressible turbulent mixing layer from the recent theta-group collaboration which investigated in detail the physics of a transitional mixing layer. This calculation was undertaken using the University of Sydney code Flamenco with 5th order of accuracy in space, second in time, on a grid resolution of 720x512x512. The animation shows the mixing layer as seen from the heavy fluid side, such that the upper iso-surface shows the bubbles moving upwards, and the lower surface are the spikes of heavy fluid moving down. This research was supported under
Australian Research Council’s Discovery Projects funding scheme (Project No. DP150101059), and we would like to acknowledge the computational resources at the National Computational Infrastructure through the National Computational Merit Allocation Scheme.

If you want to know more about the Theta-group results, and associated research, please have a look at the following papers:
[1]B. Thornber, J Griffond, O Poujade, N Attal, H Varshochi, P Bigdelou, P Ramaprabhu, B Olson, J Greenough, Y Zhou, O Schilling, KA Garside, RJR Williams, CA Batha, PA Kuchugov, ME Ladonkina, VF Tishkin, NV Zmitrenko, VB Rozanov, DL Youngs "Late-time growth rate, mixing, and anisotropy in the multimode narrowband Richtmyer–Meshkov instability: The θ-group collaboration", Physics of Fluids 29 (10), 105107, 2017
[2] B Thornber, J Griffond, P Bigdelou, I Boureima, P Ramaprabhu, O Schilling, RJR Williams "Turbulent transport and mixing in the multimode narrowband Richtmyer-Meshkov instability" Physics of Fluids 31 (9), 096105, 2019
[3] M Groom, B Thornber "Reynolds number dependence of turbulence induced by the Richtmyer–Meshkov instability using direct numerical simulations", Journal of Fluid Mechanics 908, 2021
[4] M Groom, B Thornber "Direct numerical simulation of the multimode narrowband Richtmyer–Meshkov instability" Computers & Fluids 194, 104309, 2019
[5] DL Youngs, B Thornber "Buoyancy–Drag modelling of bubble and spike distances for single-shock Richtmyer–Meshkov mixing" Physica D: Nonlinear Phenomena 410, 132517, 2020
[6] DL Youngs, B Thornber "Early Time Modifications to the Buoyancy-Drag Model for Richtmyer–Meshkov Mixing" Journal of Fluids Engineering 142 (12), 2020

And for the numerical methods:

[7] B Thornber, A Mosedale, D Drikakis, D Youngs, RJR Williams "An improved reconstruction method for compressible flows with low Mach number features" Journal of computational Physics 227 (10), 4873-4894, 2008.