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Yuichi Murai
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Journal Articles

Hydraulic Transport of Large Solid Particles in Inclined Pipes Under Pulsating Flow Conditions

Sotaro Masanobu, Satoru Takano, Marcio Yamamoto, Hyun Jin Park, Yuji Tasaka, Yuichi Murai
Journal: Journal of Offshore Mechanics and Arctic Engineering
Publisher: ASME
Article Type: Research Papers
J. Offshore Mech. Arct. Eng. February 2025, 147(1): 011802.
Paper No: OMAE-24-1044
https://doi.org/10.1115/1.4065970
Published Online: September 3, 2024
View Article titled, Hydraulic Transport of Large Solid Particles in Inclined Pipes Under Pulsating Flow Conditions
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Topics: Flow (Dynamics), Particulate matter, Pipes, Pressure, Water
Journal Articles

Direct Numerical Simulation On Millimeter-Sized Air Bubbles in Turbulent Channel Flow

Sangwon Kim, Nobuyuki Oshima, Hyun Jin Park, Yuichi Murai
Journal: Journal of Fluids Engineering
Publisher: ASME
Article Type: Photo Gallery
J. Fluids Eng. July 2024, 146(7): 070901.
Paper No: FE-23-1451
https://doi.org/10.1115/1.4065300
Published Online: April 16, 2024
View Article titled, Direct Numerical Simulation On Millimeter-Sized Air Bubbles in Turbulent Channel Flow
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Topics: Bubbles, Channel flow, Computer simulation, Turbulence
Proceedings Papers

Study on Large Particle Slurry Transport in Inclined Pipes With Pulsating Flow for Subsea Mining

Sotaro Masanobu, Satoru Takano, Marcio Yamamoto, Yuichi Murai, Yuji Tasaka, Hyun Jin Park
Proc. ASME. OMAE2023, Volume 4: Ocean Space Utilization, V004T05A010, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-100939
https://doi.org/10.1115/OMAE2023-100939
View Paper titled, Study on Large Particle Slurry Transport in Inclined Pipes With Pulsating Flow for Subsea Mining
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Topics: Mining, Ocean engineering, Particulate matter, Pipes, Pressure, Pulsatile flow, Slurries
Proceedings Papers

Study on Large Particle Slurry Transport in Jumper for Subsea Mining

Sotaro Masanobu, Marcio Yamamoto, Satoru Takano, Yuichi Murai
Proc. ASME. OMAE2022, Volume 4: Ocean Space Utilization, V004T05A008, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79597
https://doi.org/10.1115/OMAE2022-79597
View Paper titled, Study on Large Particle Slurry Transport in Jumper for Subsea Mining
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Topics: Mining, Ocean engineering, Particulate matter, Pressure, Slurries
Proceedings Papers

Void Waves Developing in Gas-Liquid Two-Phase Turbulent Boundary Layers Beneath a Flat Bottom Model Ship

Taiji Tanaka, Hyun Jin Park, Yuji Tasaka, Yuichi Murai
Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A046, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5272
https://doi.org/10.1115/AJKFluids2019-5272
View Paper titled, Void Waves Developing in Gas-Liquid Two-Phase Turbulent Boundary Layers Beneath a Flat Bottom Model Ship
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Topics: Boundary layer turbulence, Ships, Waves
Proceedings Papers

Air Entrainment and Bubble Generation by a Hydrofoil in a Turbulent Channel Flow

Ichiro Kumagai, Kakeru Taguchi, Chiharu Kawakita, Tatsuya Hamada, Yuichi Murai
Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A048, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5457
https://doi.org/10.1115/AJKFluids2019-5457
View Paper titled, Air Entrainment and Bubble Generation by a Hydrofoil in a Turbulent Channel Flow
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Topics: Air entrainment, Bubbles, Channel flow, Drag reduction, Hydrofoil, Ships, Turbulence
Proceedings Papers

Three-Dimensional Measurement of Smoke Density Distribution by Switching Volumetric Color Illumination Patterns

Hyun Jin Park, Yuhei Sugano, Yuji Tasaka, Yuichi Murai
Proc. ASME. AJKFluids2019, Volume 4: Fluid Measurement and Instrumentation; Micro and Nano Fluid Dynamics, V004T04A037, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4871
https://doi.org/10.1115/AJKFluids2019-4871
View Paper titled, Three-Dimensional Measurement of Smoke Density Distribution by Switching Volumetric Color Illumination Patterns
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Topics: Density, Smoke
Proceedings Papers

Visualization of Microbubble Distribution Inside Turbulent Boundary Layer Along Flat and Curved Solid Surfaces

Yuichi Murai, Daichi Saito, Daiki Ushiyama, Hyun Jin Park, Yuji Tasaka
Proc. ASME. AJKFluids2019, Volume 5: Multiphase Flow, V005T05A001, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4647
https://doi.org/10.1115/AJKFluids2019-4647
View Paper titled, Visualization of Microbubble Distribution Inside Turbulent Boundary Layer Along Flat and Curved Solid Surfaces
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Topics: Boundary layer turbulence, Visualization
Proceedings Papers

Color Particle Image Velocimetry Improved by Decomposition of RGB Distribution Integrated in Depth Direction

Yuichi Murai, Norio Yonezawa, Yoshihiko Oishi, Yuji Tasaka, Takeaki Yumoto
Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT20A003, July 26–31, 2015
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2015-20189
https://doi.org/10.1115/AJKFluids2015-20189
View Paper titled, Color Particle Image Velocimetry Improved by Decomposition of RGB Distribution Integrated in Depth Direction
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Topics: Particulate matter, Smoke, Contamination, Imaging, Flow (Dynamics), Integral equations, Sensors, Signals, Video cameras, Wavelength
Proceedings Papers

Ultrasonic Measurement of Gas Bubbles Advecting Under a Ship Bottom for Investigating Drag Reduction Performance

Hyun Jin Park, Yuji Tasaka, Yoshihiko Oishi, Yuichi Murai
Proc. ASME. AJKFluids2015, Volume 1A: Symposia, Part 2, V01AT20A004, July 26–31, 2015
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2015-20242
https://doi.org/10.1115/AJKFluids2015-20242
View Paper titled, Ultrasonic Measurement of Gas Bubbles Advecting Under a Ship Bottom for Investigating Drag Reduction Performance
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Topics: Bubbles, Drag reduction, Ships, Ultrasonic measurement, Shear stress, Boundary layer turbulence, Liquid films, Lubrication theory, Model basin, Porosity
Proceedings Papers

Influence of Internal Objects in Flow Characteristics of Darrieus Turbine

Kotaro Takeshima, Yuji Tasaka, Yuichi Murai
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 693-700, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-22039
https://doi.org/10.1115/AJK2011-22039
View Paper titled, Influence of Internal Objects in Flow Characteristics of Darrieus Turbine
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Topics: Flow (Dynamics), Turbines, Blades, Wind, Cylinders, Computer simulation, Instrumentation, Particulate matter, Propellers, Rotation
Proceedings Papers

Flow of a Viscoelastic Fluid Around a Falling Sphere

Takahisa Shiratori, Yuji Tasaka, Yuichi Murai, Kazuya Oyama, Ichiro Kumagai, Yasushi Takeda
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2657-2662, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-11003
https://doi.org/10.1115/AJK2011-11003
View Paper titled, Flow of a Viscoelastic Fluid Around a Falling Sphere
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Topics: Flow (Dynamics), Viscoelastic fluids, Fluids, Wakes, Deformation, Tensors, Non-Newtonian fluids, Particulate matter, Shear (Mechanics), Viscoelasticity
Proceedings Papers

Self Organized Structure of Microbubble Plume in a Thin Fluid Layer

Yoshihito Miyagishima, Tomoaki Watamura, Yuji Tasaka, Yuichi Murai
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2669-2675, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-11006
https://doi.org/10.1115/AJK2011-11006
View Paper titled, Self Organized Structure of Microbubble Plume in a Thin Fluid Layer
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Topics: Fluids, Plumes (Fluid dynamics), Microbubbles, Bubbles, Bubbly flow, Flow (Dynamics), Fluorescence, Lasers, Vessels, Visualization
Proceedings Papers

Dynamics of Cell Pattern Formation in Internally Heated Convection Viewed From Local to Global Particle Image Thermometry

Ryuta Abe, Yuji Tasaka, Ichiro Kumagai, Yuichi Murai, Takatoshi Yanagisawa
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 2717-2722, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-11014
https://doi.org/10.1115/AJK2011-11014
View Paper titled, Dynamics of Cell Pattern Formation in Internally Heated Convection Viewed From Local to Global Particle Image Thermometry
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Topics: Convection, Dynamics (Mechanics), Particulate matter, Pattern formation, Temperature measurement, Thermal boundary layers, Rayleigh number, Electromagnetic scattering, Fluids, Liquid crystals
Proceedings Papers

Particle Image Velocimetry for Air Flows Behind Permeable Cylinders

Hirotaka Takeuchi, Yuji Tasaka, Yuichi Murai, Yasushi Takeda, Hideaki Tezuka, Michitsugu Mori
Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 671-678, July 30–August 2, 2007
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2007-37035
https://doi.org/10.1115/FEDSM2007-37035
View Paper titled, Particle Image Velocimetry for Air Flows Behind Permeable Cylinders
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Topics: Air flow, Cylinders, Particulate matter, Flow (Dynamics), Permeability, Smoke, Brightness (Photometry), Circular cylinders, Density, Eddies (Fluid dynamics)
Proceedings Papers

Dynamics and Optics of Bubble Tracking Velocimetry for Airflow Measurement

Tetsushi Kanda, Yuichi Murai, Yuji Tasaka, Yasushi Takeda
Proc. ASME. FEDSM2007, Volume 1: Symposia, Parts A and B, 679-686, July 30–August 2, 2007
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2007-37036
https://doi.org/10.1115/FEDSM2007-37036
View Paper titled, Dynamics and Optics of Bubble Tracking Velocimetry for Airflow Measurement
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Topics: Air flow, Bubbles, Dynamics (Mechanics), Optics, Flow (Dynamics), Particulate matter, Visualization, Boundary layers, Generators, Imaging
Proceedings Papers

Flow Structure and Pressure Loss of Two-Phase Flow in Helically Coiled Tubes

Masa-aki Ishikawa, Hiroshi Oiwa, Kosuke Sakai, Yuichi Murai, Shin-ichi Toda, Kiyoshi Tamayama, Fujio Yamamoto
Proc. ASME. FEDSM2003, Volume 1: Fora, Parts A, B, C, and D, 1453-1458, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45376
https://doi.org/10.1115/FEDSM2003-45376
View Paper titled, Flow Structure and Pressure Loss of Two-Phase Flow in Helically Coiled Tubes
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Topics: Flow (Dynamics), Pressure, Two-phase flow
Proceedings Papers

Measurement of Effective Viscosity in Bubbly Flow Using Free-Falling Sphere

Hiroshi Oiwa, Yuichi Murai, Masa-aki Ishikawa, Fujio Yamamoto
Proc. ASME. FEDSM2003, Volume 1: Fora, Parts A, B, C, and D, 639-645, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45644
https://doi.org/10.1115/FEDSM2003-45644
View Paper titled, Measurement of Effective Viscosity in Bubbly Flow Using Free-Falling Sphere
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Topics: Bubbles, Bubbly flow, Viscosity
Proceedings Papers

Particle Tracking Velocimetry Measurement of Bubble-Bubble Interaction

Masa-aki Ashihara, Atsuhide Kitagawa, Masa-aki Ishikawa, Akihiro Nakashinchi, Yuichi Murai, Fujio Yamamoto
Proc. ASME. FEDSM2003, Volume 1: Fora, Parts A, B, C, and D, 2277-2284, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45208
https://doi.org/10.1115/FEDSM2003-45208
View Paper titled, Particle Tracking Velocimetry Measurement of Bubble-Bubble Interaction
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Topics: Bubbles, Particulate matter, Multiphase flow, Dynamics (Mechanics), Flow (Dynamics)
Proceedings Papers

Bubble-Driven Convection Around Cylinders Confined in a Channel

Yuichi Murai, Toshio Sasaki, Masa-aki Ishikawa, Fujio Yamamoto
Proc. ASME. FEDSM2003, Volume 1: Fora, Parts A, B, C, and D, 1429-1435, July 6–10, 2003
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2003-45373
https://doi.org/10.1115/FEDSM2003-45373
View Paper titled, Bubble-Driven Convection Around Cylinders Confined in a Channel
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Topics: Bubbles, Convection, Cylinders, Flow (Dynamics), Shapes, Bubbly flow, Flow visualization, Image processing, Particulate matter, Porosity