A5048076964- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Turbulent Flows
- Fluid Dynamics and Mixing
- Heat Transfer and Boiling Studies
- Nuclear Engineering Thermal-Hydraulics
- Fusion materials and technologies
- Nuclear reactor physics and engineering
- Surface Modification and Superhydrophobicity
- Heat Transfer Mechanisms
- Lattice Boltzmann Simulation Studies
- Computational Fluid Dynamics and Aerodynamics
- Magnetic confinement fusion research
- Particle Dynamics in Fluid Flows
- Cyclone Separators and Fluid Dynamics
- Heat transfer and supercritical fluids
- Heat Transfer and Optimization
- Nuclear Materials and Properties
- Metallurgical Processes and Thermodynamics
- Fluid Dynamics Simulations and Interactions
- Fluid Dynamics and Thin Films
- Digital Holography and Microscopy
- Nanofluid Flow and Heat Transfer
- Fluid Dynamics and Vibration Analysis
- nanoparticles nucleation surface interactions
- Spacecraft and Cryogenic Technologies
Kyoto University
2013-2024
Kyoto Katsura Hospital
2013-2024
Zhejiang University
2019-2024
Zhejiang Energy Research Institute
2023
Kyushu Institute of Technology
2016
Japan Atomic Energy Agency
1989-2012
Advanced Energy (United States)
2011
Institute of Economic Research of the Slovak Academy of Sciences
2011
Chiba University
2008
Tokyo University of Science
2006-2007
In industrial applications involving spray-cooling, combustion, and so on, prediction of the maximum spreading diameter a droplet impinging on solid surface permits quantitative estimation heat removal energy consumption. However, although there are many experimental studies regarding impingement behaviour, theoretical models have an applicability limit for predicting diameter. present study, we developed analytical model based conservation that considers adhesion in both horizontal vertical...
This paper details high time-resolution flow field measurements in a micro-pipe made by micro digital holographic particle tracking velocimetry (micro-DHPTV) method. The system consists of an objective lens, high-speed camera and single high-frequency double pulsed laser. volume the is 409.6 µm × 92 µm. It illuminated laser beam with pulse length 58 ns, resolution time 100 µs repetition rate 1 kHz. 104 velocity vectors could be obtained instantaneously micro-pipe. Particle positions...
AbstractThe ARIES research program is a multi-institutional effort to develop several visions of tokamak reactors with enhanced economic, safety, and environmental features. Three are currently planned for the program. The ARIES-I design DT-burning reactor based on "modest" extrapolations from present physics database relies either existing technology or which trends already in place, often programs outside fusion; ARIES-II will employ potential advances physics; ARIES-III conceptual D-3He...
A new liquid-crystal thermometry method is described to determine an isothermal map on a heat transfer surface coated with cholesteric layer that changes color according temperature. This based the use of set sharp band-pass optical filters, one which attached black-and-white video camera take monochromatic image having specified color. From image, line was drawn aid digital processing technique excludes human sensation. We obtain as many lines filters and can map. An experiment presented...
We have designed a special purpose computer system for digital holographic particle tracking velocimetry (DHPTV). present the pipeline calculating intensity of an object from hologram by fast Fourier transform in FPGA chip. This uses four chips and can make 100 reconstructed images 256x256-grid 266 msec. It is expected that this will improve efficiency analysis DHPTV.
The impingement behaviours of droplets towards solid substrates depend on the liquid properties, velocity and surface conditions, such as wettability roughness. However, prediction regarding whether droplet splashes after impingement, is still an open question. Here we show that splashing can be predicted by pressure balance film appearing beneath coupled with modified energy equation. Hydrodynamic hydrostatic pressures are driving forces for droplet's radial spreading, while capillary at...
A direct numerical simulation code with cylindrical geometry has been developed. (DNS) of an impinging round jet into parallel disks is performed for a Reynolds number 10,000 based on the nozzle exit velocity and diameter (D). Mean flow variables, turbulent intensity, pressure distribution kinetic energy budgets are obtained at various radial locations. The present DNS results in fairly good agreement two‐dimensional PTV measurements by Nishino co‐workers 1996. Some features this regarding...
Abstract Gas entrainment (GE) phenomena, such as a pump sump, are observed in many industrial scenes. Moreover, design studies of Japanese sodium-cooled fast reactors, occurrences GEs concern because compact reactor vessel is expected to be employed owing its economical advantages and coolant velocity being higher than that conventionally designed vessels. However, the occurrence conditions too difficult predict by theoretical methods they usually highly nonlinear phenomena. Therefore, we...
Gas–liquid two-phase flows are typical in engineering systems involving heat and mass transfers. The cross-sectional geometries sizes of these flow channels vary, exerting a notable impact on the thermofluid behavior. To develop models, it is imperative to obtain local measurements gain insights into their characteristics from measurements. Numerous experimental studies have investigated circular pipes rectangular channels; however, few square been conducted, particularly for regimes beyond...
This paper is to describe a new direct numerical procedure for solving general multiphase flow problems with many free surfaces and interfaces. Since conventional cell volume fraction approaches, such as SOLA-VOF, use the donor-acceptor transport of fluid-segments, they cannot interface slope sufficient accuracy. In present study, accurate algorithm advection its reconstruction, called MARS (Multi-interfaces Advection Reconstruction Solver), was developed. It consists continuum surface force...
Abstract Direct numerical simulations of turbulent pipe flow have been carried out in a constant transverse magnetic field. The Reynolds number based on bulk velocity and diameter is set to Reb = 5300 for three Hartmann numbers, Ha, 5, 10 20. skin friction velocity, profiles, intensities kinetic energy budget along the circumferential direction obtained streaky structure has investigated via computational visualization. coefficient decreases cases Ha 5 10; however, it increases case profile...