title: Implicit large eddy simulation of shock-driven material mixing.
abstract: Under-resolved computer simulations are typically unavoidable in practical turbulent flow applications exhibiting extreme geometrical complexity and a broad range of length and time scales. An important unsettled issue is whether filtered-out and subgrid spatial scales can significantly alter the evolution of resolved larger scales of motion and practical flow integral measures. Predictability issues in implicit large eddy simulation of under-resolved mixing of material scalars driven by under-resolved velocity fields and initial conditions are discussed in the context of shock-driven turbulent mixing. The particular focus is on effects of resolved spectral content and interfacial morphology of initial conditions on transitional and late-time turbulent mixing in the fundamental planar shock-tube configuration.
authors.affiliation: Los Alamos National Laboratory, , Los Alamos NM 87545, USA.
authors.forename: F F
authors.initials: FF
authors.lastname: Grinstein
authors.forename: A A
authors.initials: AA
authors.lastname: Gowardhan
authors.forename: J R
authors.initials: JR
authors.lastname: Ristorcelli
keywords: implicit large eddy simulation; large eddy simulation; shock driven; turbulent mixing