A5085688638- Aeolian processes and effects
- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Fluid Dynamics and Turbulent Flows
- Geology and Paleoclimatology Research
- Particle Dynamics in Fluid Flows
- Cryospheric studies and observations
- Astro and Planetary Science
- Planetary Science and Exploration
- Atmospheric aerosols and clouds
- Wind and Air Flow Studies
- Plant Water Relations and Carbon Dynamics
- Hydraulic flow and structures
- Space Exploration and Technology
- Aerospace Engineering and Energy Systems
- Fire Detection and Safety Systems
- Geological formations and processes
- Meteorological Phenomena and Simulations
- Power Line Inspection Robots
- Digital Holography and Microscopy
- Spectroscopy Techniques in Biomedical and Chemical Research
- Computer Graphics and Visualization Techniques
- UAV Applications and Optimization
- Image Enhancement Techniques
- Winter Sports Injuries and Performance
University of Minnesota
2021-2023
The University of Texas at Dallas
2023
Saint Anthony College of Nursing
2021-2023
National Renewable Energy Laboratory
2023
Twin Cities Orthopedics
2023
University of Notre Dame
2015-2022
University of Minnesota System
2022
The spatial coherence of turbulent flow structures throughout the field associated with a collision between smaller upstream barchan laterally offset from larger downstream is investigated using inhomogeneous, two‐point correlation coefficients fluctuating streamwise velocity, which distribution, size, and orientation large‐scale motions in are analyzed. Measurements were made fixed‐bed models refractive‐index‐matched flume environment allowing uninhibited optical access where captured...
Barchan dunes are three‐dimensional, crescent‐shaped bedforms found in regions of unidirectional flow and limited sediment supply, while most commonly associated with aeolian environments, they have recently been observed subaqueous domains on the surfaces Mars Titan. As barchans migrate direction flow, interact their neighbors, typically by way collision. The morphodynamics such collision processes complex, where role turbulent structure is strongly coupled to that transport morphological...
The three‐dimensional, crescentic morphology of a barchan dune induces secondary flows and complex vortex structure in its wake. In scenarios where barchans are close proximity to each other, the flow modifications introduced by wake upstream important for understanding morphodynamics downstream barchan. results herein detail plane normal mean (cross‐plane) through stereo particle image velocimetry measurements refractive‐index‐matching facility, utilizing solid, fixed‐bed models. Spatial...
Sand patches are one of the precursors to early-stage protodunes and occur widely in both desert coastal aeolian environments. Here we show field evidence a mechanism explain initiation sand on non-erodible surfaces, such as gravels moist beaches. Changes transport dynamics, directly associated with height saltation layer variable law, observed at boundary between erodible surfaces lead deposition surface. This explains how can form limited availability where linear stability dune theory...
Abstract
A novel flow facility developed to enable a broad spectrum of fluid mechanics experiments involving complex geometries and employing high-fidelity optical diagnostics is described in this paper. The development the facility, which comprises two fully operational refractive-index-matched (RIM) tunnels, was guided by ambition overcome experimental roadblocks that often inhibit study high Reynolds-number geophysical environmental flows with modern techniques, like particle image velocimetry....
Abstract Decimeter‐scale early‐stage aeolian bedforms represent topographic features that differ notably from their mature dune counterparts, with nascent forms exhibiting more gently sloping lee sides and a reverse asymmetry in flow‐parallel bed profile compared to dunes. Flow associated the development of these “protodunes,” wherein crest gradually shifts downstream towards its state, was investigated by studying perturbation turbulent boundary layer over succession representative...
Emissions of particulate matter into the atmosphere are essential to characterize, in terms properties such as particle size, morphology, and composition, better understand impacts on public health climate. However, there is no currently available technology capable measuring individual particles with high detail over extensive domains associated events wildfires or volcanic eruptions. To solve this problem, we present an autonomous measurement system involving unmanned aerial vehicle (UAV)...
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 Although mammograms have been a useful tool since the first half of 20th century and an acceptable sensitivity (87%) in general population, that drops to <50% women with dense breasts making it ineffective screening this population. Cell free DNA (cfDNA) has proven be inadequate alternative while MRI is acceptable, expensive. Astrin Biosciences developed blood-based assay detects circulating tumor cells (CTCs) at high serve as method mammography breast cancer early detection,...
Abstract Recent research increasingly validates the early dissemination of tumor cells in peripheral blood during nascent stages cancer, often preceding clinical identification primary tumor. This emerging evidence emphasizes potential Circulating Tumor Cells (CTCs) as indicators for cancer. Despite their significance, CTCs are exceptionally rare compared to normal cells, which presents a considerable challenge detection, particularly Traditional detection methods, such those based on...
Barchan dunes are crescent shaped bedforms found in both aeolian and subaqueous environments, including deserts, river beds, continental shelves, even the craters of Mars. The evolution dynamics associated with these mobile involve a strong degree coupling between sediment transport, morphological change, flow, last which represents weakest link our current understanding barchan morphodynamics. Their three-dimensional geometry presents experimental challenges for measuring full flow field,...
Emissions of particulate matter into the atmosphere are essential to characterize, in terms properties such as particle size, morphology, and composition, better understand impacts on public health climate. However, there is no currently available technology capable measuring individual particles with high detail over extensive domains associated events wildfires or volcanic eruptions. To solve this problem, we present an autonomous measurement system involving unmanned aerial vehicle (UAV)...