A5059613559- Nuclear Engineering Thermal-Hydraulics
- Nuclear reactor physics and engineering
- Fluid Dynamics and Mixing
- Fluid Dynamics and Turbulent Flows
- Heat Transfer and Boiling Studies
- Nuclear Materials and Properties
- Aerodynamics and Acoustics in Jet Flows
- Combustion and flame dynamics
- Cyclone Separators and Fluid Dynamics
- Heat transfer and supercritical fluids
- Particle Dynamics in Fluid Flows
- Metallurgical Processes and Thermodynamics
- Meteorological Phenomena and Simulations
- Wind and Air Flow Studies
- Heat Transfer and Optimization
- Fluid Dynamics and Thin Films
- Nuclear Physics and Applications
- Flow Measurement and Analysis
- Thermodynamic and Structural Properties of Metals and Alloys
- Computational Fluid Dynamics and Aerodynamics
- Aerospace Engineering and Energy Systems
- Arctic and Antarctic ice dynamics
- Combustion and Detonation Processes
- Engineering Applied Research
- Laser-induced spectroscopy and plasma
University of Michigan
2014-2024
ETH Zurich
2021-2024
Paul Scherrer Institute
2011-2024
Michigan United
2021-2023
State Street (United States)
2023
Ann Arbor Center for Independent Living
2021
Dollezhal Research and Development Institute of Power Engineering
2006
Attaching bio-telemetry or -logging devices (‘tags’) to marine animals for research and monitoring adds drag streamlined bodies, thus affecting posture, swimming gaits energy balance. These costs have never been measured in free-swimming cetaceans. To examine the effect of from a tag on metabolic rate, cost transport behavior, four captive male dolphins (Tursiops truncatus) were trained swim set course, either non-tagged (n=7) fitted with (DTAG2; n=12), surface exclusively flow-through...
The understanding of flow regimes in helical coils is essential the design and operation modern heat exchangers has been studied therefore intensively over past decades. However, due to subjective nature defining these regimes, previous studies showed conflicting results. scope present study perform automatic regime recognition for two-phase flows by a novel two-step machine learning approach without any prior knowledge. algorithms are trained on X-ray radiography based high-resolution...
AbstractHybrid Reynolds-Averaged Navier-Stokes–Large Eddy Simulation was used to reveal detailed flow information and timescales in an isothermal reactor cavity cooling system plenum four-jet configuration. Plenum asymmetry nonuniformity work together cause premature jet merging. Bulk stirring the causes lateral vortex shedding, strong jet-jet interactions, swirl, confluence. Two dominant transient modes exist: a timescale then circulation that is nearly three orders of magnitude larger. A...
The bubbling of particle-contaminated gases through a liquid pool, called aerosol scrubbing, is reliable, robust, and efficient collection technique to retain harmful aerosols from industrial processes or hazardous incidents. In this multiphase mass transfer phenomenon, the two-phase flow mechanics strongly influences particle transport gas in bubble surrounding liquid. numerical experimental studies have primarily focused on ideal flows separate test effects. Here we developed new approach...
Abstract The characterization of thin liquid films is relevant to many engineering applications, ranging from oil and chemical industry refrigeration systems, cooling light water nuclear reactors. total internal reflection method (TIRM) an optical known for decades being able non-intrusively measure film thickness a wide range fluids flowing over transparent wall, but systematic studies on the accuracy are still missing. In this work, TIRM presented all main potential error sources related...
Abstract Drag force acting on swimming marine mammals is difficult to measure directly. Researchers often use simple modeling and kinematic measurements from animals, or computational fluid dynamics (CFD) simulations estimate drag. However, studies that compare these methods are lacking. Here, simulation physical experiments were used drag forces gliding bottlenose dolphins ( Tursiops truncatus ). To facilitate comparison, variable loading no‐tag, tag, tag + 4, 8 ) was increase in both...
We assess the sensitivity of LIBS for trace xenon detection in a helium buffer and its suitability online monitoring reactor fuel integrity.
Instrumenting animals with tags contributes additional resistive forces (weight, buoyancy, lift and drag) that may result in increased energetic costs; however, metabolic expense can be moderated by adjusting behaviour to maintain power output. We sought increase hydrodynamic drag for near-surface swimming bottlenose dolphins, investigate the effect of instrumentation. In this experiment, we whether (1) rate increases systematically loading from different sizes or (2) tagged individuals...
Helical coil heat exchangers are known for their superior transfer, compactness and robustness against thermal expansion compared to systems with straight pipes. Due all these benefits, they became quite popular in the last few decades various industries such as pharmaceutical, chemical or nuclear. Generally, used a single-phase environment evaporation taking place on shell side. However, most of steam generator designs adopted advanced nuclear reactors, two-phase mixture flows upward within...
Microreactor technologies are required to provide reliable carbon-free power generation in remote applications. The heat pipe–cooled microreactor concept, particular, offers notable advantages due the passive operation of pipes, enabling increased reliability and simplicity a more compact form factor. There is significant need for experimental work aid expedite deployment pipe microreactors their unique technological characteristics. Thus, there has been interest experiments by numerous...
Plasma-induced fluid convection is a poorly understood phenomenon originating at the plasma-liquid interface. Diffusive transport, both natural and driven, as well effects determines rate which reactive species are produced interface those diffusing from gas phase, ultimately mix within solution. Efficient mass transfer rates important to number of applications ranging water purification plasma medicine. In order understand mechanisms plasma-generated active species' transport through...
Annular quasimonoenergetic electron beams with a mean energy in the range 200-400 MeV and charge on order of several picocoulombs were generated laser wakefield accelerator subsequently accelerated using plasma afterburner two-stage gas cell. Generation these is associated injection occurring density down ramp between stages. This well-localized produces bunch electrons performing coherent betatron oscillations wakefield, resulting significant increase x-ray yield. distributions are detected...
Heat pipe microreactors are reactor designs that primarily use liquid-metal heat pipes to cool the core. The main interest in is fact they can remove passively. This, along with of liquid metal, allows operate at higher temperatures. Although nuclear reactors new, technology mature. Nevertheless, experimental data on scarce, and very little known about their behavior during abnormal operations close thermal limits. Therefore, new experiments accurate simulations needed develop reliable...
Radiation transmission measurement methods have become widely implemented in the study of two-phase flow due to leaping advancements detector efficiency, spatial resolution, and high-speed capabilities. However, radiation-based measurements boiling experiments bear several challenges mismatch calibration experimental conditions, beam hardening, thermal expansion, material working fluid density changes with temperature. The present research focuses on developing analyze high-resolution X-ray...
In the present work, two large eddy simulations (LESs) of single isothermal jets discharging into enclosure facilities are proposed. The geometries and tested flow conditions correspond to scaled experiments upper plenum high-temperature gas-cooled reactors. More specifically, reference were conducted at Texas A&M University Michigan University. objective work is validate these with their corresponding experiments. proposed LES models performed NekRS, a spectral element code graphics...
Turbulent round free jets are one of the most common jet types, which have been intensively studied in research community for over 90 years. Due to its characteristics momentum transport shear layers, this type is widely used several industrial applications varying from nuclear reactor safety analysis aerospace engine designs. Focusing on close-to-jet (near-field) and self-similar regions, entrainment can be properly described by Reynolds numbers flow fields.To establish a nonconfined jet,...