A5008436868- Fluid Dynamics and Vibration Analysis
- Wave and Wind Energy Systems
- Additive Manufacturing and 3D Printing Technologies
- Additive Manufacturing Materials and Processes
- Fluid Dynamics and Turbulent Flows
- Manufacturing Process and Optimization
- Lattice Boltzmann Simulation Studies
- Coastal and Marine Dynamics
- Aluminum Alloys Composites Properties
- Radiation Detection and Scintillator Technologies
- Robotic Locomotion and Control
- Graphite, nuclear technology, radiation studies
- Aerospace Engineering and Energy Systems
- Computational Fluid Dynamics and Aerodynamics
- Plasma and Flow Control in Aerodynamics
- Nuclear reactor physics and engineering
- Meteorological Phenomena and Simulations
- Biomimetic flight and propulsion mechanisms
- Spacecraft and Cryogenic Technologies
- Heat Transfer and Optimization
- Carbon Dioxide Capture Technologies
- Phase Equilibria and Thermodynamics
- Wind Energy Research and Development
- Numerical methods for differential equations
- Icing and De-icing Technologies
Oak Ridge National Laboratory
2023-2025
Government of the United States of America
2023
University of Alabama
2018-2022
Abstract In this study, a finite volume simulation framework was developed, validated, and employed for the first time in new solid-state additive manufacturing repair process, Additive Friction Stir Deposition (AFSD). The open-source computational fluid dynamics (CFD) code openfoam used to simulate deposition of single layer Aluminum Alloy 6061 feedstock onto substrate, using viscoplastic model predict flow behavior material. Conjugate heat transfer considered between build layer,...
Vertical-axis wind turbines (VAWTs) have drawn increased attention for off-grid and off-shore power generation due to inherent advantages over the more popular horizontal-axis (HAWTs). Among these are generator locale, omni-directionality simplistic design. However, one major disadvantage is lower efficiency, which can be alleviated through blade pitching. Since each must transit both up- down-stream revolution, VAWT pitching techniques not yet commonplace complexity cost. Utilizing...
Abstract Direct energy conversion from ocean waves requires some method of rectifying the oscillatory motion to produce a unidirectional output. The Wells turbine accomplishes this with horizontally mounted symmetric blades, which net torque output when combined an oscillating water column. Previous studies have been conducted, investigate effects blade profile, solidity, stator tip gap clearance, and number guide vane designs intended improve performance. Both experimental computational...
Additive friction stir deposition (AFSD) is a solid-state additive manufacturing process that exploits frictional heat generation and severe plastic deformation to deposit material achieve metallurgical bonding while avoiding liquid-to-solid phase transformations. The AFSD enables layer-by-layer depositions without many of the issues associated with fusion-based processing traditional wrought alloys, such as porosity, hot cracking, high residual stress. Unfortunately, conditions are highly...
The Wells turbine is a self-rectifying device that employs symmetrical blade profile, and often used in conjunction with an oscillating water column to extract energy from ocean waves. effects of solidity, angle attack, shape many other parameters have been widely studied both numerically experimentally. To date, several 3-D numerical simulations performed using commercial software, mostly steady flow conditions employing various two-equation turbulence models. In this paper, the open source...
The threat of climate change has driven scientists and engineers to develop new methods reducing carbon emitted as well capturing CO2 from the atmosphere other point sources. Carbon capture technology is still in its infancy requires significant system efficiency improvements before commercial or industrial adoption not cost prohibitive. Contactor designs must optimize while minimizing pumping losses through this stage, typical contactors employ a packing material that wetted with fluid...