A5043755058- Coastal and Marine Dynamics
- Tropical and Extratropical Cyclones Research
- Ocean Waves and Remote Sensing
- Hydraulic flow and structures
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Fluid Dynamics Simulations and Interactions
- Wave and Wind Energy Systems
- Soil erosion and sediment transport
- Plasma and Flow Control in Aerodynamics
- Hydrology and Watershed Management Studies
- Cryospheric studies and observations
- Dam Engineering and Safety
- Hydrology and Sediment Transport Processes
- Earthquake and Tsunami Effects
- Computational Fluid Dynamics and Aerodynamics
National Chung Hsing University
2015-2021
The main goal of this paper is to provide insights into swash flow dynamics, generated by a non-breaking solitary wave on steep slope. Both laboratory experiments and numerical simulations are conducted investigate the details runup rundown processes. Special attention given evolution bottom boundary layer over slope in terms separation, vortex formation development hydraulic jump during phase. Laboratory were performed measure velocity fields means high-speed particle image velocimetry...
The characteristics of flow fields for a complete evolution the non-breaking solitary wave, having wave-height to water-depth ratio 0.363 and propagating over 1:5 sloping bottom, are investigated experimentally. This study mainly focuses on occurrences both separation boundary layer under an adverse pressure gradient subsequent hydraulic jump with abrupt rising free surface during rundown motion shoaling together emphasis vortex structures underlying separated shear jump. A visualization...
Experimental results are presented regarding the free-surface elevations, velocity fields, and horizontal pressure gradients of dambreak-generated undular bores propagating over a bottom. Ultrasonic wave gauges, high-speed particle image velocimetry, flow visualization method used to investigate fields. Features full-depth field gradient (equal minus sum local convective accelerations) in free stream boundary layer elucidated with respect phase elevation categorized into four temporal...
An experimental investigation is performed to elucidate the variations of accelerations and pressure gradients in external stream retreating flow during run-down phase a non-breaking solitary wave, propagating over 1:3 sloping beach. Two waves that have incident wave heights (H0) 2.9 5.8 cm, with respective still water depths (h0) 8.0 16.0 cm (Cases A B), were generated flume, resulting wave-height water-depth ratios (H0/h0) being identically equal 0.363. The latter case was only used...
An experimental results on the spatio-temporal variation of velocity field and vortex structure, generated from separated boundary layers offshore side still-water shoreline, during run-down process non-breaking solitary waves over a 1:3 sloping beach are presented. Three having incident wave-height to water-depth ratios (H0/h0) 0.363, 0.263, 0.171 were in wave flume. Two flow visualization techniques high-speed particle image velocimetry employed. The primary topics new findings are: (1)...
In this work, a detailed description of the internal flow field in collapsing bore generated on slope wave flume is given. It found that case at hand, just prior to breaking, shape free surface and below are dominated by capillary effects. While numerical approximations able predict development as it shoals laboratory beach, poorly predicted standard models.
The hydrodynamic characteristics, including local and convective accelerations as well pressure gradient in the horizontal direction, of external stream an undular bore propagating on a 1:20 sloping beach are experimentally studied. A with water depth ratio 1.70 was generated downstream suddenly lifted gate. high-speed particle image velocimetry employed to measure velocity fields during run-up run-down motions. time series free surface elevation field/profile bore, comprising pure...
In this paper we study the swash processes generated by a nonbreaking solitary wave running up and down steep slope (1:3). We use experimental data to flow features velocities inside boundary layer, numerical modelling investigate variables not measured during laboratory experiments, such as pressures bottom shear stress. focus on mechanisms that produce separation vortex formation. Particularly, system of vortices under hydraulic jump rundown phase, which was first observed Matsunaga &...
The study uses 30 years of the third generation Advanced Very-High-Resolution Radiometer (AVHRR) NDVI3g monthly data from 1982 to 2012 identify natural clusters and important driving factors upstream watersheds in Taiwan through hierarchical cluster analysis (HCA) redundancy (RDA), respectively. Subsequently, as a result HCA, six were identified based on NDVI data, delineating unique characteristics watersheds. Additionally, RDA results, environmental factors, including precipitation,...