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Koichi Tanimoto
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Journal Articles

Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning

Accepted Manuscript
Ali Haghiri, Xiaowei Xu, Richard Sandberg, Koichi Tanimoto, Takuo Oda
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power.
Paper No: GTP-24-1407
https://doi.org/10.1115/1.4066594
Published Online: September 20, 2024
View Article titled, Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning
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Topics: Eddies (Fluid dynamics), Flow (Dynamics), Machine learning, Natural convection, Turbulence, Viscosity, Reynolds-averaged Navier–Stokes equations, Heat flux, Reynolds stress, Computer programming
Proceedings Papers

Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning

Ali Haghiri, Xiaowei Xu, Richard D. Sandberg, Koichi Tanimoto, Takuo Oda
Proc. ASME. GT2024, Volume 13: Heat Transfer: General Interest / Additive Manufacturing Impacts on Heat Transfer; Wind Energy, V013T13A003, June 24–28, 2024
Publisher: American Society of Mechanical Engineers
Paper No: GT2024-121161
https://doi.org/10.1115/GT2024-121161
View Paper titled, Improving a Two-Equation Eddy-Viscosity Turbulence Model for High-Rayleigh-Number Natural-Convection Flows Using Machine Learning
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Topics: Eddies (Fluid dynamics), Flow (Dynamics), Machine learning, Modeling, Natural convection, Turbulence, Viscosity
Proceedings Papers

High-Fidelity Computational Assessment of Aero-Thermal Performance and the Reynolds’ Analogy for Additively Manufactured Anisotropic Surface Roughness

Thomas O. Jelly, Wagih Abu Rowin, Nicholas Hutchins, Daniel Chung, Koichi Tanimoto, Takuo Oda, Richard D. Sandberg
Proc. ASME. GT2023, Volume 7B: Heat Transfer — General Interest/Additive Manufacturing Impacts on Heat Transfer; Internal Air Systems; Internal Cooling, V07BT13A005, June 26–30, 2023
Publisher: American Society of Mechanical Engineers
Paper No: GT2023-102138
https://doi.org/10.1115/GT2023-102138
View Paper titled, High-Fidelity Computational Assessment of Aero-Thermal Performance and the Reynolds’ Analogy for Additively Manufactured Anisotropic Surface Roughness
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Topics: Additive manufacturing, Anisotropy, Heat transfer, Surface roughness, Turbulence, Flow (Dynamics), Pressure, Channel flow, Computational fluid dynamics, Computer simulation
Journal Articles

High-Fidelity Computational Assessment of Aero-Thermal Performance and the Reynolds’ Analogy for Additively Manufactured Anisotropic Surface Roughness

Thomas O. Jelly, Wagih Abu Rowin, Nicholas Hutchins, Daniel Chung, Koichi Tanimoto, Takuo Oda, Richard D. Sandberg
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. November 2023, 145(11): 111005.
Paper No: TURBO-23-1148
https://doi.org/10.1115/1.4063298
Published Online: September 14, 2023
View Article titled, High-Fidelity Computational Assessment of Aero-Thermal Performance and the Reynolds’ Analogy for Additively Manufactured Anisotropic Surface Roughness
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Topics: Surface roughness, Turbulence, Heat transfer, Additive manufacturing
Journal Articles

Interface Capturing Flow Boiling Simulations in a Compact Heat Exchanger

Anna Iskhakova, Yoshiyuki Kondo, Koichi Tanimoto, Nam T. Dinh, Igor A. Bolotnov
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2023, 145(4): 041605.
Paper No: HT-22-1486
https://doi.org/10.1115/1.4056688
Published Online: February 8, 2023
View Article titled, Interface Capturing Flow Boiling Simulations in a Compact Heat Exchanger
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Topics: Boiling, Bubbles, Flow (Dynamics), Simulation, Nucleation (Physics), Cavities, Heat transfer, Heat transfer coefficients, Engineering simulation
Includes: Supplementary data
Proceedings Papers

Development and Validation of Simulation Method for a Two-Phase Flow Ejector

Hiroaki Nakanishi, Yoshiteru Komuro, Yoshiyuki Kondo, Koichi Tanimoto
Proc. ASME. ICONE29, Volume 7B: Thermal-Hydraulics and Safety Analysis, V07BT07A017, August 8–12, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICONE29-92652
https://doi.org/10.1115/ICONE29-92652
View Paper titled, Development and Validation of Simulation Method for a Two-Phase Flow Ejector
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Topics: Computational fluid dynamics, Ejectors, Fluids, Simulation, Two-phase flow
Proceedings Papers

Study on the Applicability of a Machine-Learning Framework to Improve Modeling for the Stratification Phenomenon

Takuo Oda, Shimpei Okayasu, Nobuhide Hara, Koichi Tanimoto, Ali Haghiri, Xiaowei Xu, Richard Sandberg
Proc. ASME. ICONE29, Volume 8: Computational Fluid Dynamics (CFD) and Applications, V008T08A026, August 8–12, 2022
Publisher: American Society of Mechanical Engineers
Paper No: ICONE29-91829
https://doi.org/10.1115/ICONE29-91829
View Paper titled, Study on the Applicability of a Machine-Learning Framework to Improve Modeling for the Stratification Phenomenon
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Topics: Computer programming, Machine learning, Modeling, Thermal stratification, Turbulence
Journal Articles

Experimental and Numerical Study for Improved Understanding of Mixed-Convection Type of Flows in Turbine Casing Cavities During Shut-Down Regimes

Oguzhan Murat, Budimir Rosic, Koichi Tanimoto, Ryo Egami
Journal: Journal of Engineering for Gas Turbines and Power
Publisher: ASME
Article Type: Research-Article
J. Eng. Gas Turbines Power. December 2021, 143(12): 121009.
Paper No: GTP-21-1356
https://doi.org/10.1115/1.4052026
Published Online: October 4, 2021
View Article titled, Experimental and Numerical Study for Improved Understanding of Mixed-Convection Type of Flows in Turbine Casing Cavities During Shut-Down Regimes
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Topics: Cavities, Cylinders, Flow (Dynamics), Heat transfer, Mixed convection, Temperature, Turbines, Turbulence, Annulus, Plumes (Fluid dynamics)
Proceedings Papers

Experimental and Numerical Study for Improved Understanding of Mixed-Convection Type of Flows in Turbine Casing Cavities During Shut-Down Regimes

Oguzhan Murat, Budimir Rosic, Koichi Tanimoto, Ryo Egami
Proc. ASME. GT2021, Volume 8: Oil and Gas Applications; Steam Turbine, V008T22A008, June 7–11, 2021
Publisher: American Society of Mechanical Engineers
Paper No: GT2021-59135
https://doi.org/10.1115/GT2021-59135
View Paper titled, Experimental and Numerical Study for Improved Understanding of Mixed-Convection Type of Flows in Turbine Casing Cavities During Shut-Down Regimes
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Topics: Cavities, Flow (Dynamics), Mixed convection, Turbines, Computational fluid dynamics, Engines, Natural convection, Convection, Cooling, Cross-flow
Journal Articles

High-Fidelity Simulations of Multi-Jet Impingement Cooling Flows

J. Javier Otero-Pérez, Richard D. Sandberg, Satoshi Mizukami, Koichi Tanimoto
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. August 2021, 143(8): 081011.
Paper No: TURBO-20-1346
https://doi.org/10.1115/1.4050446
Published Online: May 3, 2021
View Article titled, High-Fidelity Simulations of Multi-Jet Impingement Cooling Flows
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Topics: Cross-flow, Flow (Dynamics), Heat transfer, Impingement cooling, Inflow, Simulation, Turbulence, Jets, Deflection
Proceedings Papers

High-Fidelity Simulations of Multi-Jet Impingement Cooling Flows

J. Javier Otero-Pérez, Richard D. Sandberg, Satoshi Mizukami, Koichi Tanimoto
Proc. ASME. GT2020, Volume 7A: Heat Transfer, V07AT15A011, September 21–25, 2020
Publisher: American Society of Mechanical Engineers
Paper No: GT2020-14728
https://doi.org/10.1115/GT2020-14728
View Paper titled, High-Fidelity Simulations of Multi-Jet Impingement Cooling Flows
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Topics: Engineering simulation, Flow (Dynamics), Impingement cooling, Simulation, Cross-flow, Heat transfer, Turbulence, Inflow, Computer simulation, Deflection
Proceedings Papers

Development on Simulation Method for Two-Phase Flow in Large Diameter Pipes With 90 Degree Elbows

Yoshiteru Komuro, Atsushi Kodama, Yoshiyuki Kondo, Koichi Tanimoto, Takashi Hibiki
Proc. ASME. ICONE2020, Volume 1: Beyond Design Basis; Codes and Standards; Computational Fluid Dynamics (CFD); Decontamination and Decommissioning; Nuclear Fuel and Engineering; Nuclear Plant Engineering, V001T03A019, August 4–5, 2020
Publisher: American Society of Mechanical Engineers
Paper No: ICONE2020-16747
https://doi.org/10.1115/ICONE2020-16747
View Paper titled, Development on Simulation Method for Two-Phase Flow in Large Diameter Pipes With 90 Degree Elbows
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Topics: Pipes, Simulation, Two-phase flow
Proceedings Papers

Development of Evaluation Method for Thermal Stratification by Cavity Flow in a Vertical Branch Pipe With Elbow and Horizontal Section: Experimental Results

Atsushi Kodama, Yoshiteru Komuro, Keiichi Hori, Hironori Noguchi, Yoshiyuki Kondo, Koichi Tanimoto
Proc. ASME. ICONE26, Volume 6A: Thermal-Hydraulics and Safety Analyses, V06AT08A014, July 22–26, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ICONE26-81143
https://doi.org/10.1115/ICONE26-81143
View Paper titled, Development of Evaluation Method for Thermal Stratification by Cavity Flow in a Vertical Branch Pipe With Elbow and Horizontal Section: Experimental Results
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Topics: Cavity flows, Evaluation methods, Pipes, Thermal stratification, Flow (Dynamics), Water, Fatigue, High temperature, Temperature, Temperature profiles
Proceedings Papers

Development of Evaluation Method for Thermal Stratification by Cavity Flow in a Vertical Branch Pipe With Elbow and Horizontal Section: Modeling of Evaluation Method

Atsushi Kodama, Yoshiteru Komuro, Keiichi Hori, Hironori Noguchi, Yoshiyuki Kondo, Koichi Tanimoto
Proc. ASME. ICONE26, Volume 6A: Thermal-Hydraulics and Safety Analyses, V06AT08A015, July 22–26, 2018
Publisher: American Society of Mechanical Engineers
Paper No: ICONE26-81144
https://doi.org/10.1115/ICONE26-81144
View Paper titled, Development of Evaluation Method for Thermal Stratification by Cavity Flow in a Vertical Branch Pipe With Elbow and Horizontal Section: Modeling of Evaluation Method
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Topics: Cavity flows, Evaluation methods, Modeling, Pipes, Thermal stratification, Fatigue, High temperature, Temperature, Water, Cycles
Journal Articles

Experimental Study of Horizontal Bubble Plume With Computational Fluid Dynamics Benchmarking

Shao-Wen Chen, Christopher Macke, Takashi Hibiki, Mamoru Ishii, Yang Liu, Peng Ju, Subash Sharma, Yoshiyuki Kondo, Tsutomu Kawamizu, Takashi Yoshimoto, Seiji Kagawa, Koichi Tanimoto
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Research-Article
J. Fluids Eng. November 2016, 138(11): 111301.
Paper No: FE-15-1395
https://doi.org/10.1115/1.4033560
Published Online: July 15, 2016
View Article titled, Experimental Study of Horizontal Bubble Plume With Computational Fluid Dynamics Benchmarking
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Topics: Bubbles, Computational fluid dynamics, Ejectors, Flow (Dynamics), Fluids, Plumes (Fluid dynamics), Porosity, Simulation, Nozzles, Probes
Proceedings Papers

Two-Phase Flow Induced Force Fluctuations on Pipe Bend

Shuichiro Miwa, Yang Liu, Takashi Hibiki, Mamoru Ishii, Yoshiyuki Kondo, Hideyuki Morita, Koichi Tanimoto
Proc. ASME. ICONE22, Volume 2B: Thermal Hydraulics, V02BT09A007, July 7–11, 2014
Publisher: American Society of Mechanical Engineers
Paper No: ICONE22-30573
https://doi.org/10.1115/ICONE22-30573
View Paper titled, Two-Phase Flow Induced Force Fluctuations on Pipe Bend
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Topics: Fluctuations (Physics), Pipe bends, Two-phase flow, Flow (Dynamics), Slug flows, Pressure, Collisions (Physics), Databases, Fluids, Flux (Metallurgy)
Proceedings Papers

Experimental Study of Stable Droplet in Blowdown Phenomenon of Large Break LOCA

Yoshiyuki Kondo, Koichi Tanimoto, Keiichi Hori, Tatsuo Ishiguro, Junji Ogata, Shigemitsu Umezawa, Tetsuya Teramae, Yuji Furukawa
Proc. ASME. ICONE12, 12th International Conference on Nuclear Engineering, Volume 3, 637-642, April 25–29, 2004
Publisher: American Society of Mechanical Engineers
Paper No: ICONE12-49349
https://doi.org/10.1115/ICONE12-49349
View Paper titled, Experimental Study of Stable Droplet in Blowdown Phenomenon of Large Break LOCA
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Topics: Drops, Flow (Dynamics)