A5003028801- Laser-Plasma Interactions and Diagnostics
- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- High-Velocity Impact and Material Behavior
- Optical measurement and interference techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Structural Response to Dynamic Loads
- Plasma and Flow Control in Aerodynamics
- Magnetic confinement fusion research
- Advanced Battery Technologies Research
- Force Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Supercapacitor Materials and Fabrication
- earthquake and tectonic studies
- Advanced battery technologies research
- Advanced Optical Imaging Technologies
- Gamma-ray bursts and supernovae
- Combustion and Detonation Processes
- High-pressure geophysics and materials
Georgia Institute of Technology
2017-2023
Drexel University
2013
The effect of initial conditions on transition to turbulence is studied in a variable-density shock-driven flow. Richtmyer–Meshkov instability (RMI) evolution fluid interfaces with two different imposed perturbations observed before and after interaction second shock reflected from the end wall tube (reshock). first perturbation predominantly single-mode long-wavelength interface which formed by inclining entire 80 $^{\circ }$ relative horizontal, yielding an amplitude-to-wavelength ratio,...
Abstract A novel experimental approach to study the blast-driven instability at a nondiffuse, gaseous interface with density gradient is presented. Under Euler similarity, this enables of dissipative-scale hydrodynamics relevant many astrophysical and laboratory high energy phenomena in well-resolved manner. The initiated by passing Taylor–Sedov blast wave originating from controlled detonation through perturbed stably stratified between two gases. facility driving are characterized obtain...
High-speed experiments studying the Blast Driven Instability are used to validate Reynolds-Averaged Navier-Stokes (RANS) and Large eddy simulation (LES) turbulent mixing models. The work helps elucidate three regimes of instability shows that LES can successfully capture, at lease first order, complex physics therein. also highlights limitations RANS models for transitioning instabilities how results remain highly sensitive characterization initial conditions.
In this study, ensembles of experimental data are presented and utilized to compare validate two models used in the simulation variable density, compressible turbulent mixing. Though kind (Reynolds Averaged Navier Stokes Large Eddy Simulations) have been validated extensively with more canonical flows previous studies, present approach offers novelty complexity geometry, ensemble based validation, uniformity computational framework on which tested. Moreover, all tasks were completed by...