A5101614736- Groundwater flow and contamination studies
- Hydraulic Fracturing and Reservoir Analysis
- Climate Change and Health Impacts
- Air Quality and Health Impacts
- Global Health Care Issues
- Aerospace and Aviation Technology
- Advanced Aircraft Design and Technologies
- Drilling and Well Engineering
- Seismic Imaging and Inversion Techniques
- Geophysical Methods and Applications
- Flow Measurement and Analysis
- Dam Engineering and Safety
- Thermoregulation and physiological responses
- Aerospace Engineering and Control Systems
Chonnam National University
2021-2025
Korea Atomic Energy Research Institute
2025
Pusan National University
2021-2024
Seoul National University
2017-2019
Abstract This study made the first experimental attempt to visualize transition processes from linear nonlinear flow regimes in rough‐walled rock fractures for a better understanding of evolution fractures. The experiments visualized narrowing mainstream channel associated with eddies enlarged near fracture wall increasing applied flux. measured fluid velocity field showed that these structures resulted significant increase narrowed main and relatively small eddy zone. order‐of‐magnitude...
The development of personal aerial vehicles (PAVs) using electric power distributed propulsion methods is rapidly growing. As the aerodynamic performance and flight stability characteristics can be significantly affected by multiple-propeller operation, analysis reflecting power-on effect required for design/development. Simulating all propellers general computational fluid dynamics inefficient in terms time cost. Therefore, this study evaluates practicality actuator two aircrafts with...
Abstract This study investigates the impact of transition from viscous linear to inertial nonlinear flows on solute mixing and partitioning at rough‐walled fracture intersections, using direct observations flow dynamics processes through microscopic particle image velocimetry. It is generally known that intersections decreases when transport shifts diffusion‐dominated advection‐dominated processes, but this trend holds only in flows. The experimental results conducted reveal flows,...
ABSTRACT The difficulty in experimentally visualising solute transport leads to theoretical and numerical studies of rock fractures. This study presents the comprehensive experimental method for investigating microscopic processes rough‐walled fractures, including setup micro‐PIV system combined with time‐lapse imaging, visualisation a detailed calibration process convert fluorescence intensity into concentration analysis. transition dispersion regime from macrodispersion Taylor increasing...
The diurnal temperature range (DTR) represents variability within a day and has been reported as potential risk factor for mortality. Previous studies attempted to identify the role of in DTR-mortality association, but results are inconclusive. aim this study was investigate interactive effect DTR on mortality using multicountry time series analysis.We collected data weather variables 57 communities three countries (Taiwan, Korea, Japan) Northeast Asia (1972-2012). Two-stage regression with...
Experimental observation and measurement are essential to fundamentally understanding the processes that govern fluid flow mass transport in rough-walled fractures. The micro-PIV (micro-Particle Image Velocimetry) technique has been introduced for visualization inside microscale However, methodology yet be established, which is crucial analysis/quantification of dispersion This study presented improved visualize measure solute concentration rock Calibration determining from measured...
This numerical study aims at analyzing the effect of flow characteristics, caused by geometrical features such as intersecting angles, on solute mixing fracture junctions.It showed that not only Pe, ratio advection to diffusion, but also angles played an important role in junction.For intersection less than 90°, fluid flowed outlet same direction injected direction, which increased contact junction with streamlines coming from different inlets.On other hand, for greater out opposite inlet,...