SAKAMOTO Nobuaki

サカモトノブアキ | SAKAMOTO Nobuaki

Research field (2)： Fluid engineering , Marine and maritime engineering

Research keywords (2)： Computational Fluid Dynamics , Computational Ship Hydrodynamics

Research theme for competitive and other funds (8)：

2024 - 2027 Study on maneuvering motion and navigation safety of a container ship in canal using free-run-CFD
2022 - 2025 Development of data assimilation method for accurate prediction in sten flow using EnTKF and RaNS
2019 - 2022 Development of propeller cavitation method in CFD based on improved interface capturing method and bubble dynamics modeling
2016 - 2019 実船の流場計測等による船舶の高度性能評価システムの構築のための調査研究業務
2015 - 2016 船舶水中騒音の海洋生物への影響に関する調査研究(水中騒音プロジェクト)

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Papers (44)：

Nobuaki Sakamoto, Takanori Hino, Hiroshi Kobayashi, Kunihide Ohashi. Parameter adaptation of k - ω SST turbulence model for improving resolution of moderately separated flows around 2D wing and 3D ship hulls via EnKF data assimilation. Journal of Marine Science and Technology. 2024
Nobuaki Sakamoto. Parameter Estimation for 1-eq./2-eq Turbulence Models by EnKF Data Assimilation: Twin Experiment With 2D Flat Plate. Proceedings of the ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering. 2023. 7
Nobuaki Sakamoto, Kunihide Ohashi, Hiroshi Kobayashi, Takanori Hino. Overset RaNS simulations and validations for the effect of false bottom to the KCS under static drift and static rudder in shallow water. Journal of Marine Science and Technology. 2023. 28. 1. 248-269
Nobuaki Sakamoto, Takuya Ohmori, Kunihide Ohashi, Hiroshi Kobayashi. False bottoms revisited: computational study for KCS under pure yaw motion in shallow water (H/T = 1.2). Journal of Marine Science and Technology. 2022. 28. 1. 117-135
Jennie Andersson, Alex Abolfazl Shiri, Rickard E. Bensow, Jin Yixing, Wu Chengsheng, Qiu Gengyao, Ganbo Deng, Patrick Queutey, Yan Xing-Kaeding, Peter Horn, et al. Ship-scale CFD benchmark study of a pre-swirl duct on KVLCC2. Applied Ocean Research. 2022. 123. #103134-103134

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MISC (48)：

Nobuaki Sakamoto, Takanori Hino, Kunihide Ohashi, Hiroshi Kobayashi. Revisiting DA for Parameters of k-ω SST Model with 2D NACA4412 and Their Application to 3D Hull Forms. Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers. 2024. 38. 755-762
Akira Nishioka, Nobuaki Sakamoto, Kunihide Ohashi, Hiroshi Kobayashi, Tokihiro Katsui, Koki Kawane, Shun Kuwahara, Hirohisa Mieno. Assessment of Roughness Models in RaNS Solver NAGISA with 2D Rotating Cylindrical Annuals. Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers. 2024. 38. 807-815
Yuya Matsunaga, Katsunao Takahashi, Yoshitaka Furukawa, Takuya Omori, Nobuaki Sakamoto, Kunihide Ohashi, Hiroshi Ibaragi. Research on Hydrodynamics Forces acting on Ship Hull running in Narrow Waterway. Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers. 2023. 37. 415-420
Masanari Kagamisono, Hironori Yasukawa, Nobuaki Sakamoto, Kunihide Ohashi, Takuya Omori, Akihiko Matsuda, Ryusuke Okuda, Masaaki Sano. Ship turning simulations in shallow water using a Free-Run CFD. Conference Proceedings The Japan Society of Naval Architects and Ocean Engineers. 2023. 37. 401-409
Nobuaki Sakamoto, Takuya Ohmori, Kunihide Ohashi. Computational Investigation of Shallow Water Effect in Esso Osaka under Zig-Zag Maneuvers in Full Scale. Proc. Advanced Maritime Engineering Conference - AMEC 2023 -. 2023

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Patents (9)：

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Lectures and oral presentations (17)：

Estimation of flow field and maneuvrability of ships in full scale by CFD
(KFR 358th annual meeting: Full scale CFD nowadays and way forward 2024)
Parameter adaptation of turbulence model for ship wake prediction using data assimilation
(24th NMRI Research Openhouse 2024)
On the necessity of data assimilation in ship hydrodynamics and its prototype development
(DAE-DO Workshop4 2024)
False bottom effect for captive/dynamic PMM tests in shallow water
(US-Japan Joint Workshop on Ship Hydrodynamics in Hiroshima U. 2023)
Preliminary Study of Parameter Estimation for Turbulence Models by EnKF Data Assimilation
(Workshop on Environmental Technologies in Naval Architecture and Ocean Engineering 2022)

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Education (3)：

2005 - 2009 The University of Iowa Graduate College of Engineering, Ph.D. Department of Mechanical and Industrial Engineering
2003 - 2005 The University of Iowa Graduate College of Engineering, M.Sci. Department of Mechanical and Industrial Engineering
1999 - 2003 Osaka Prefecture University College of Engineering Department of Marine System Engineering

Professional career (2)：

Work history (6)：

2023/10 - 2024/09 National Maritime Research Institute Fluids Engineering & Ship Performance Evaluation Dept, CFD R&D team Principal Research Scientist
2017/09 - 2024/08 The University of Tokyo, Graduate School of Frontier Science Adjunct lecturer
2014/04 - 2023/09 National Maritime Research Institute Chief Research Engineer
2009/04 - 2014/03 National Maritime Research Institute Research Engineer
2003/05 - 2009/03 The University of Iowa Department of Mechanical and Industrial Engineering Graduate Teaching Assistant

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Committee career (3)：

Awards (6)：

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Association Membership(s) (1)：

日本船舶海洋工学会

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