Time-Resolved Measurements of Turbulent Mixing in Shock-Driven Variable-Density Flows.

ABSTRACT: Recent developments of burst-mode lasers and imaging systems have opened new realms of simultaneous diagnostics for velocity and density fields at a rate of 1 kHz-1 MHz. These enable the exploration of previously unimaginable shock-driven turbulent flow fields that are of significant importance to problems in high-energy density physics. The current work presents novel measurements using simultaneous measurements of velocity and scalar fields at 60 kHz to investigate Richtmyer-Meshkov instability (RMI) in a spatio-temporal approach. The evolution of scalar fields and the vorticity dynamics responsible for the same are shown, including the interaction of shock with the interface. This temporal information is used to validate two vorticity-deposition models commonly used for initiation of la

SUBMITTER: Carter J 

PROVIDER: S-EPMC6937284 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature