About me
Hi! My name is Dai Nakai, and I am a second-year Ph.D. student at the Measurement System Laboratory, Kyoto Institute of Technology. My research focuses on high-speed 3D imaging using inline holography for studying dispersed flows, particle fields, and micrometer-scale objects. Currently, I am working to contribute to the fields of atmospheric science and fluid dynamics.
日本語の情報は Tips&Posts か researchmap をご覧ください→→
Research
My research focuses on visualizing and statistically analyzing the three-dimensional trajectories and collision phenomena of micro-water droplets. These droplets are sprayed into a turbulent wind tunnel, and their behavior is captured using high-speed photography and holographic techniques. The growth process of droplets in the tens-of-microns range is not yet fully understood by current precipitation theories or computational models. Existing findings suggest that phenomena characteristic of turbulence enhance collision rates, thereby accelerating droplet growth. To further elucidate this process, two key objectives are critical:
- Quantifying the droplet collision probability distribution under a variety of turbulent conditions.
- Determining the contribution of specific turbulent phenomena to the acceleration of droplet growth.
To achieve these objectives, my research involves three main steps:
- Establishing a robust holographic particle tracking velocimetry (HPTV) method.
- Validating this HPTV method by reproducing the collision probability distribution in laminar flow, a phenomenon already characterized in previous studies.
- Conducting measurements in wind tunnel experiments where turbulence intensity is precisely controlled.
Recents
Presented at the 21st International Symposium on Flow Visualization (ISFV21)
Talk at National Olympics Memorial Youth Center, Tokyo, Japan
Presented at the 17th Symposium on Aerosol Cloud Climate Interactions at the AMS 105th Annual Meeting
Talk at New Orleans Ernest N. Morial Convention Center, New Orleans, LA, USA
Presented at the Meteorological Society of Japan 2024 Fall Meeting
Talk at TSUKUBA International Congress Center, Tsukuba, Japan
Presented at ISOM 2024
Talk at Arcrea HIMEJI, Himeji, Japan
Presented at the 2024 Annual Meeting of JSEM
Talk at Faculty of Engineering, Yamagata University, Yonezawa, Japan
Education
- M.S. in Engineering, Kyoto Institute of Technology, 2024
- B.S. in Engineering, Kyoto Institute of Technology, 2022
Work experience
- Spring 2024-: Research Fellow of Japan Society for the Promotion of Science (DC1)
- Kyoto Institute of Technology
- Japan Society for the Promotion of Science (JSPS, 日本学術振興会)
- Supervisor: Dr. Yohsuke Tanaka
Skills
- Mechanical Engineering
- Mechanical Design, 3D Printing
- Applied Optics, Optical Measurement
- Particle image/tracking velocimetry (PIV/PTV)
- Speckle Interferometry
- Digital holography, Inline holography, Phase retrieval holography
- Image Processing, Image Recognition
- GPU Computing (CUDA)
- Real-time Image Processing (Jetson Nano, Parallel Computing)
- Deep Learning (PyTorch, TensorFlow)
- Unsupervised Domain Adaptation, Domain Adversarial Neural Networks (DANN)
Contact
Please feel free to contact me via email.