A5035124432- Additive Manufacturing and 3D Printing Technologies
- Fluid Dynamics and Heat Transfer
- Particle accelerators and beam dynamics
- Additive Manufacturing Materials and Processes
- Superconducting Materials and Applications
- Heat Transfer and Boiling Studies
- Particle Detector Development and Performance
- Planetary Science and Exploration
- Manufacturing Process and Optimization
- Particle Accelerators and Free-Electron Lasers
- Astro and Planetary Science
- Nuclear reactor physics and engineering
- Spacecraft and Cryogenic Technologies
- Fluid Dynamics and Thin Films
- Laser-induced spectroscopy and plasma
- Heat Transfer and Optimization
- Spacecraft Design and Technology
- Nuclear Physics and Applications
- Space Exploration and Technology
- Innovations in Concrete and Construction Materials
- Welding Techniques and Residual Stresses
- Fault Detection and Control Systems
- Surface Modification and Superhydrophobicity
- Gamma-ray bursts and supernovae
- Nuclear Engineering Thermal-Hydraulics
Los Alamos National Laboratory
2014-2023
Purdue University West Lafayette
1995-2002
Los Alamos Medical Center
1997-1998
The ChemCam instrument suite on the Mars Science Laboratory (MSL) rover Curiosity provides remote compositional information using first laser-induced breakdown spectrometer (LIBS) a planetary mission, and sample texture morphology data micro-imager (RMI). Overall, supports MSL with five capabilities: classification of rock soil characteristics; quantitative elemental compositions including light elements like hydrogen some to which LIBS is uniquely sensitive (e.g., Li, Be, Rb, Sr, Ba);...
This study presents a detailed and thorough parametric of the Leidenfrost point (LFP), which serves as temperature boundary between transition film boiling regimes. Sessile drop evaporation experiments were conducted with acetone, benzene, FC-72, water on heated aluminum surfaces either polished, particle blasted, or rough sanded finishes to observe influential effects fluid properties, surface roughness, contamination LFP. A weak relationship energies LFP was observed by performing droplet...
This study presents, for impinging droplets and sprays, a model of the Leidenfrost point (LFP); minimum liquid/solid interface temperature required to support film boiling on smooth surface. The present is an extension previously developed sessile drop model, based bubble nucleation, growth, merging criteria, as well surface cavity size characterization [3]. basic concept that temperatures at above LFP, sufficient number cavities are activated growth rates sufficiently fast continuous vapor...
This study presents a new mechanistic model of the Leidenfrost point (LFP); minimum liquid/solid interface temperature required to support film boiling on smooth surface. The is structured around bubble nucleation, growth, and merging criteria, as well surface cavity size characterization. It postulated that for temperatures at above LFP, sufficient number cavities (about 20 percent) are activated growth rates sufficiently fast continuous vapor layer established nearly instantaneously...
An experimental study was performed to characterize the transition boiling heat transfer rate from a surface stream of impinging water droplets and extrapolate this information predict dilute spray. First, data were gathered for continuous monodispersed striking polished nickel surface. From these data, empirical correlations developed describe efficiency droplet velocities between 1.0ms−1 7.1ms−1, diameters ranging 0.250×10−3mto1.002×10−3m, temperatures covering 110–240°C. By properly...
Abstract The ability to detect impact waves and their propagation across materials is the key structural health monitoring defect detection of materials. To from a certain type structures, it important for sensor be highly flexible complex in shape. Direct ink write (DIW) allows manufacturing sensors. This article presents fabrication wave (IWPS) through DIW technique. dispersion ferroelectric ceramic material barium titanate (BaTiO 3, or BTO) polydimethylsiloxane (PDMS), not only enhances...
Purpose This paper aims to present spot pattern welding (SPW) as a scanning strategy for laser-foil-printing (LFP) additive manufacturing (AM) in place of the previously used continuous (CPW) (line-raster scanning). The SPW involves generating sequence overlapping welds on metal foil, allowing laser form dense and uniform weld beads. turn reduces thermal gradients, promotes material consolidation helps mitigate process-related risks such cracking, porosity, keyholing Marangoni effects....
Fused deposition modelling (FDM) is an additive manufacturing (AM) technique which involves melting a thermoplastic filament material and subsequently extruding it, layer by layer, to create three-dimensional objects. The nature of this build process yields parts with inhomogeneous compositions, may result in anisotropic thermal mechanical properties. In work, such anisotropies were investigated for different commercially-available FDM materials as polylactic acid, acrylonitrile butadiene...