Hydrodynamic modeling of inherently 3D structures in shear driven NIF experiments

Shear-driven instability experiments at the National Ignition Facility (NIF) demonstrated the transition from initially a Two-Dimensional (2D) Kelvin-Helmholtz like flow into 3D mixing in later times. With the help of 3D Implicit Large Eddy Simulations (ILES), we demonstrate that this transition can be explained purely by the hydrodynamic evolution of the system. Further, we apply Los Alamos National Laboratory (LANL) sub-grid mix models to reduce the computational cost of these simulations while predicting the correct statistically-averaged mixing quantities. All simulations are performed using the state-of-art LANL Eulerian code xRAGE with Adaptive Mesh Refinement (AMR).