A5032190555- nanoparticles nucleation surface interactions
- High-pressure geophysics and materials
- Theoretical and Computational Physics
- Laser-induced spectroscopy and plasma
- Solidification and crystal growth phenomena
- Material Dynamics and Properties
- Laser-Plasma Interactions and Diagnostics
- Laser Material Processing Techniques
- Dust and Plasma Wave Phenomena
- Tribology and Lubrication Engineering
- Diamond and Carbon-based Materials Research
- Aluminum Alloy Microstructure Properties
- Atomic and Molecular Physics
- Gas Dynamics and Kinetic Theory
- Scientific Measurement and Uncertainty Evaluation
- Laser Design and Applications
- Nuclear reactor physics and engineering
- Nanowire Synthesis and Applications
- Vacuum and Plasma Arcs
- Electron and X-Ray Spectroscopy Techniques
- Surface Roughness and Optical Measurements
- Block Copolymer Self-Assembly
- Energetic Materials and Combustion
- Additive Manufacturing Materials and Processes
- Magnetic confinement fusion research
Lawrence Livermore National Laboratory
2014-2021
Los Alamos National Laboratory
2020
University of Rochester
2020
Energetics (United States)
2020
University of California, Davis
2009
Northwestern University
2009
Northeastern University
2006
Crystal-melt interfacial free energies $(\ensuremath{\gamma})$ are computed for hcp Mg by employing equilibrium molecular-dynamics (MD) simulations and the capillary-fluctuation method (CFM). This work makes use of a newly developed embedded-atom-method (EAM) interatomic potential fit to crystal, liquid, melting properties. We describe how CFM, which has previously been applied cubic systems only, can be generalized studies metals parametrization orientation dependence $\ensuremath{\gamma}$...
In this paper we present molecular dynamics (MD) calculations of the interdiffusion coefficient for asymmetric mixed plasma thermodynamic conditions relevant to astrophysical and inertial confinement fusion plasmas. Specifically, consider mixtures deuterium argon at temperatures 100--500 eV a number density $\ensuremath{\sim}{10}^{25} \mathrm{ions}/{\mathrm{cm}}^{3}$. The motion 30 000--120 000 ions is simulated in which interact via Yukawa (screened Coulomb) potential. electric field...
The study of high-velocity particle-laden flow interactions is importance for the understanding a wide range natural phenomena, ranging from planetary formation to cloud interactions. Experimental observations particle dynamics are sparse given difficulty generating flows many particles. Ejecta microjets micron-scale jets formed by strong shocks interacting with imprinted surfaces generate plumes traveling at several kilometers per second. As such, interaction two ejecta provides novel...
Molecular dynamics simulations of an embedded atom copper system in the isobaric-isenthalpic ensemble are used to study effective solid-liquid interfacial free energy quasi-spherical solid crystals within a liquid. This is larger context molecular this undergoing solidification, where single individually prepared crystallites different sizes grow until they reach thermodynamically stable final state. The resulting equilibrium shapes possess full structural details expected for solids with...
We present molecular dynamics (MD) calculations of shear viscosity for asymmetric mixed plasma thermodynamic conditions relevant to astrophysical and inertial confinement fusion plasmas. Specifically, we consider mixtures deuterium argon at temperatures 100-500 eV a number density 10^{25} ions/cc. The motion 30,000-120,000 ions is simulated in which the interact via Yukawa (screened Coulomb) potential. electric field electrons included this effective interaction; are not explicitly. Shear...
Understanding dynamic fragmentation in shock-loaded metals and predicting properties of the resulting ejecta are considerable importance for both basic applied science. The nature material ejection has been shown to change drastically when free surface melts on compression or release. In this work, we present hydrodynamic simulations laser-driven microjetting from micron-scale grooves a tin surface. We study microjet formation across range shock strengths drives that leave target solid after...
In nanowire growth, kinetic processes at the growth interface can play an important role in governing wire compositions, morphologies, and rates. Molecular-dynamics simulations have been undertaken to probe such a system featuring solid-liquid shape characterized by facet bounded rough orientations. Simulated rates display dependence on diameter consistent with size-dependent barrier for nucleation. A theory mobility is developed, establishing source that intrinsic feature of systems...
Understanding ejecta interactions is broadly relevant to understanding debris shielding and materials physics. The literature contains many examples of experiments that examine generation from high explosive gas gun sources, but there exist very few laser-driven experiments. To end, we present initial measurements on the OMEGA OMEGA-EP laser facilities seek develop platforms characterize mass-velocity distributions driven ejecta, with end goal using power lasers study ejecta-ejecta...
Phase-field models have become popular in the last two decades to describe a host of free-boundary problems. The strength method relies on implicitly describing dynamics surfaces and interfaces by continuous scalar field that enters global grand free energy functional system. Here we explore potential utility this order shock-induced phase transitions. To end make use Multiphase Field Theory (MFT) account for existence multiple phases during transition, couple MFT hydrodynamic model context...