A5001799037- Wind and Air Flow Studies
- Remote Sensing and LiDAR Applications
- Wind Energy Research and Development
- Advanced Optical Sensing Technologies
- Fluid Dynamics and Turbulent Flows
- Plant Water Relations and Carbon Dynamics
- Meteorological Phenomena and Simulations
- Aeolian processes and effects
- Atmospheric aerosols and clouds
- 3D Surveying and Cultural Heritage
- Aerodynamics and Fluid Dynamics Research
- Thyroid Cancer Diagnosis and Treatment
- S100 Proteins and Annexins
- Icing and De-icing Technologies
- Tree Root and Stability Studies
- Atmospheric and Environmental Gas Dynamics
- Spectroscopy and Laser Applications
- Advanced Biosensing Techniques and Applications
- Optical measurement and interference techniques
- Precipitation Measurement and Analysis
- Advanced Vision and Imaging
- Energy Load and Power Forecasting
- Lung Cancer Treatments and Mutations
- Clusterin in disease pathology
- Pituitary Gland Disorders and Treatments
Lawrence Livermore National Laboratory
2023-2025
The University of Texas at Dallas
2020-2024
National Renewable Energy Laboratory
2023
University of Florence
2023
University of Minnesota
2023
Saint Anthony College of Nursing
2023
Recent works on wall-bounded flows have corroborated the coexistence of wall-attached eddies, whose statistical features are predicted through Townsend's attached-eddy hypothesis (AEH), and very-large-scale motions (VLSMs). Furthermore, it has been shown that presence eddies within logarithmic layer is linked to appearance an inverse-power-law region in streamwise velocity energy spectra, upon significant separation between outer viscous scales. In this work, a near-neutral atmospheric...
The atmospheric boundary layer above forest canopies is difficult to measure in practice, and our understanding of its flow physics, including the potential wind resource, limited part by observational constraints. Most available datasets come from tower point measurements, which do not generally reach into heights encountered a turbine rotor, or remote sensing are usually located outside clearing thus accurately represent conditions canopy. Here, we present field campaign that deployed four...
Introduction Calcitonin is the most specific marker for medullary thyroid carcinoma, thus, low detectable calcitonin values after surgery can conceal persistent disease. The present study aimed to explore prognostic role of pre-operative and early levels in patients without distant metastases at diagnosis. Methods A retrospective cohort suffering from carcinoma was considered (N=55). final disease status, i.e. complete response (undetectable negative radiological assessments) or (detectable...
Abstract. Continuous advancements in pulsed wind lidar technology have enabled compelling turbulence measurements within the atmospheric boundary layer with probe lengths shorter than 20 m and sampling frequency on order of 10 Hz. However, estimates radial velocity from back-scattered signal are inevitably affected by an averaging process each volume, generally modeled as a convolution between true projected along line-of-sight unknown weighting function representing energy distribution...
Abstract The exponential growth of wind energy and the need to exploit resources over areas with higher potential have led construction neighboring turbines farms relatively small separation distances. As a result, for specific atmospheric conditions, wakes generated by an upstream farm may affect available downstream resulting in detrimental impacts on harvesting structural loads downwind turbines. Distances between are typically larger than those associated intra-wind-farm wake...
To maximize the profitability of wind power plants, farms are often characterized by high turbine density leading to operations with reduced spacing. As a consequence, overall farm capture is hindered complex flow features associated modifications induced various rotors. In addition generation wakes, velocity incoming field can reduce due increased pressure in proximity single rotor (named induction); similar effect occurs at wind-farm level (global blockage), which have noticeable impact on...
Abstract A field experiment was conducted to investigate the effects of thrust force induced by utility-scale wind turbines on incoming field. Five profiling LiDARs and a scanning Doppler pulsed LiDAR were deployed in proximity row four located over relatively flat terrain, both before after construction farm. The analysis data collected during pre-construction phase enables quantifying map site, which is then leveraged correct post-construction isolate rotor-induced allows for...
Abstract Flow modifications induced by wind turbine rotors on the incoming atmospheric boundary layer (ABL), such as blockage and speedups, can be important factors affecting power performance annual energy production (AEP) of a farm. Further, these rotor‐induced effects ABL vary significantly with characteristics wind, shear, veer, turbulence intensity, operative conditions. To better characterize complex flow physics underpinning interaction between ABL, field campaign was performed...
Abstract Understanding the organization and dynamics of turbulence structures in atmospheric surface layer (ASL) is important for fundamental applied research different fields, including weather prediction, snow settling, particle pollutant transport, wind energy. The main challenges associated with probing modeling ASL are (i) broad range turbulent scales eddies present high Reynolds number boundary layers ranging from viscous scale (on order millimeters) up to large energy-containing...
Abstract. Continuous advancements in LiDAR technology have enabled compelling wind turbulence measurements within the atmospheric boundary layer with range gates shorter than 20 m and sampling frequency of order 10 Hz. However, estimates radial velocity from back-scattered laser beam are inevitably affected by an averaging process each gate, generally modeled as a convolution between actual projected along line-of-sight weighting function representing energy distribution pulse gate. As...
The atmospheric boundary layer above forest canopies is difficult to measure in practice, and our understanding of its flow physics usually still limited tall tower measurements which have reach the canopy, or vertically-profiling remote sensing are taken outside canopy. We present a recent 5-month study wind 50-m Washington state, USA, using two Doppler lidars. One vertical-profiling lidar was placed directly on top 70-m Wind River National Ecological Observatory Network (NEON) took...
The atmospheric boundary layer (ABL) height plays a key role in many processes as one of the dominant flow length scales. However, systematic quantification ABL over entire range scales (i.e., with periods ranging from minute to year) is still lacking literature. In this work, quantified based on high-resolution measurements collected by scanning pulsed Doppler LiDAR during recent American WAKE experimeNt (AWAKEN) campaign. high availability estimates (≈2200 year and each them 10-min...
Summary Over the last decades, pulsed light detection and ranging (LiDAR) anemometry has gained growing attention in probing marine atmospheric boundary layer (MABL) due to its ease of use combined with compelling spatio‐temporal resolution. Among several scanning strategies, fixed scans represent most prominent choice when high‐frequency resolution is required; however, no information provided about spatial heterogeneity wind field. On other hand, volumetric allow for characterization...
Abstract Recent experimental and numerical evidence has shown that the cumulative wake generated from overlapping of multiple wakes within a wind farm could reduce power performance enhance fatigue loads turbines installed in neighboring downstream farms may also extend up to distances one order magnitude larger than those typically considered for intra-farm interactions. Similar individual turbine wakes, have velocity deficit added turbulence intensity, both affected by rotor thrust forces...
Abstract This article introduces the first benchmark study within International Energy Agency Wind Task 57 framework, focusing on wind plant wakes. Leveraging data from American WAKE ExperimeNt (AWAKEN), aims to assess accuracy of simulation tools in modeling wakes and their impact downstream flow under diverse inflow conditions. The AWAKEN field campaign, conducted Oklahoma 2022 2024, provides unprecedented observations plant-atmosphere interactions, thus offering a large dataset validate...
Stochastically generated instantaneous velocity profiles are used to reproduce the outer region of rough-wall turbulent boundary layers in a range Reynolds numbers extending from wind tunnel field conditions. Each profile consists sequence steps, defined by modal velocities and representing uniform momentum zones (UMZs), separated jumps internal shear layers. Height-dependent UMZ is described minimal set attributes: thickness, mid-height elevation, streamwise (modal) vertical velocities....
Abstract. As wind energy deployment grows, interactions between plants and the surrounding environment become more prevalent. The current investigation seeks to understand these by characterizing impact of on planetary boundary layer height (PBLH), utilizing observations from American WAKE ExperimeNt (AWAKEN) campaign. Given ambiguity definition PBLH under stable atmospheric conditions, where is expected be strongest, a comparison different methods for identifying first conducted using data...
Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | 1479-6848 (online)
Searchable abstracts of presentations at key conferences in endocrinology ISSN 1470-3947 (print) | 1479-6848 (online)