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1. CFD ANALYSIS OF STALL IN A WELLS TURBINE

   Kincaid, K.; MacPhee, D. (July 2018, ASME 2018 Power Conference)

   The Wells turbine is a self-rectifying device that employs a symmetrical blade profile, and is often used in conjunction with an oscillating water column to extract energy from ocean waves. The effects of solidity, angle of attack, blade shape and many other parameters have been widely studied both numerically and experimentally. To date, several 3-D numerical simulations have been performed using commercial software, mostly with steady flow conditions and employing various two-equation turbulence models. In this paper, the open source code Open- FOAM is used to numerically study the performance characteristics of a Wells turbine using a two-equation turbulence model, namely the Menter SST model, in conjunction with a transient fluid solver. 

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2. Nonlinear fluorescence spectroscopy of layered perovskite quantum wells

   https://doi.org/10.1063/5.0021759  

   Ouyang, Zhenyu; Zhou, Ninghao; Hu, Jun; Williams, Olivia F.; Yan, Liang; You, Wei; Moran, Andrew M. (October 2020, The Journal of Chemical Physics)
3. Molecular engineering of organic–inorganic hybrid perovskites quantum wells

   https://doi.org/10.1038/s41557-019-0354-2  

   Gao, Yao; Shi, Enzheng; Deng, Shibin; Shiring, Stephen B.; Snaider, Jordan M.; Liang, Chao; Yuan, Biao; Song, Ruyi; Janke, Svenja M.; Liebman-Peláez, Alexander; et al (December 2019, Nature Chemistry)
4. Simulation of drop impact on substrate with micro-wells

   https://doi.org/10.1063/5.0093826  

   Islam, Ahmed; Sussman, Mark; Hu, Hui; Lian, Yongsheng (June 2022, Physics of Fluids)

   In this paper, we numerically investigate drop impact on a micro-well substrate to understand the phenomena of non-wettability. The simulation is carried out by solving three-dimensional incompressible Navier–Stokes equations using a density projection method and an adaptive grid refinement algorithm. A very sharp interface reconstruction algorithm, known as the moment-of-fluid method, is utilized to identify the multi-materials and multi-phases present in the computation domain. Our simulations predicted that a micro-well with a deep cavity can significantly reduce a solid–liquid contact in the event of drop impact. The results from the drop impact on the micro-well substrate are compared with results from drop impact on a flat substrate. Significant differences are observed between these two cases in terms of wetted area, spreading ratio, and kinetic energy. Our simulation shows that under the same conditions, a drop is more apt to jump from a micro-well substrate than from a flat surface, resulting in smaller wetted area and shorter contact time. Based on the simulation results, we draw a drop jumping region map. The micro-well substrate has a larger region than the flat surface substrate. Finally, we present a comparative analysis between a flat substrate and a substrate constructed with a dense array of micro-wells and, therefore, show that the array of micro-wells outperforms the smooth substrate with regard to non-wettability and drop wicking capability. 

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5. A Database of Groundwater Wells in the United States

   https://doi.org/10.4211/hs.8b02895f02c14dd1a749bcc5584a5c55  

   Lin, Chung-Yi; Miller, Alex; Waqar, Musab; Marston, Landon (March 2024, HydroShare)

   Groundwater wells are critical infrastructure that enable the monitoring, extraction, and use of groundwater, which has important implications for the environment, water security, and economic development. Despite the importance of wells, a unified database collecting and standardizing information on the characteristics and locations of these wells across the United States has been lacking. To bridge this gap, we have created a comprehensive database of groundwater well records collected from state and federal agencies, which we call the United States Groundwater Well Database (USGWD). Presented in both tabular form and as vector points, the USGWD comprises over 14.2 million well records with attributes such as well purpose, location, depth, and capacity for wells constructed as far back as 1763 to 2023. Rigorous cross-verification steps have been applied to ensure the accuracy of the data. The USGWD stands as a valuable tool for improving our understanding of how groundwater is accessed and managed across various regions and sectors within the United States. 

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