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Kaoru Iwamoto
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Journal Articles

Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Measured by Transient Technique

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Shimpei Kobayashi, Kento Inokuma, Akira Murata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. July 2024, 146(7): 072001.
Paper No: HT-23-1454
https://doi.org/10.1115/1.4065117
Published Online: April 17, 2024
View Articletitled, Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Measured by Transient Technique
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Topics: Flow (Dynamics), Heat transfer, Pulsatile flow, Reynolds-averaged Navier–Stokes equations, Transients (Dynamics), Friction, Geometry, Reynolds number, Flow separation
Journal Articles

Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Investigated by Large Eddy Simulation

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Kento Inokuma, Yuki Yawata, Akira Murata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2024, 146(6): 061801.
Paper No: HT-23-1455
https://doi.org/10.1115/1.4064735
Published Online: March 15, 2024
View Articletitled, Effects of Flow Pulsation and Surface Geometry on Heat Transfer Performance in a Channel With Teardrop-Shaped Dimples Investigated by Large Eddy Simulation
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Topics: Flow (Dynamics), Friction, Heat transfer, Large eddy simulation, Pulsatile flow, Geometry, Turbulence
Journal Articles

Pulsating Film-Cooling Flow Over Smooth Cutback Surface at Airfoil Trailing Edge Measured by 2D3C-PTV

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Shohei Yamamoto, Akira Murata, Katsumi Oho, Chihiro Hayakawa, Shumpei Hayakawa, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2021, 143(9): 092101.
Paper No: HT-20-1750
https://doi.org/10.1115/1.4051669
Published Online: July 22, 2021
View Articletitled, Pulsating Film-Cooling Flow Over Smooth Cutback Surface at Airfoil Trailing Edge Measured by 2D3C-PTV
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Topics: Cooling, Film cooling, Flow (Dynamics), Turbulence, Vortices
Journal Articles

Arrangement Effects of 30 deg Inclined Teardrop-Shaped Dimples on Film Cooling Flow Over Dimpled Cutback Surface at Airfoil Trailing Edge Investigated by 2D3C-PTV

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Shohei Yamamoto, Akira Murata, Hiroshi Saito, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. April 2020, 142(4): 042301.
Paper No: HT-19-1472
https://doi.org/10.1115/1.4045752
Published Online: February 20, 2020
View Articletitled, Arrangement Effects of 30 deg Inclined Teardrop-Shaped Dimples on Film Cooling Flow Over Dimpled Cutback Surface at Airfoil Trailing Edge Investigated by 2D3C-PTV
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Topics: Cooling, Film cooling, Flow (Dynamics), Airfoils, Particulate matter, Fluids, Turbulence, Cross section (Physics)
Proceedings Papers

Experimental Study on Drag Reduction Effect With Traveling Wave Control Using PIV Measurement

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Ichiro Suzuki, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A002, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4855
https://doi.org/10.1115/AJKFluids2019-4855
View Paper titled, Experimental Study on Drag Reduction Effect With Traveling Wave Control Using PIV Measurement
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Topics: Channel flow, Drag reduction, Traveling waves, Turbulence
Proceedings Papers

Prediction of Drag Reduction Effect of Pulsating Control in Turbulent Pipe Flow by Machine Learning

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Wataru Kobayashi, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A011, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5681
https://doi.org/10.1115/AJKFluids2019-5681
View Paper titled, Prediction of Drag Reduction Effect of Pulsating Control in Turbulent Pipe Flow by Machine Learning
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Topics: Drag reduction, Machine learning, Pipe flow, Turbulence
Proceedings Papers

LDV Measurement of Turbulent Pipe Flow With Traveling Wavy Elastic Wall for Drag Reduction

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Seiya Nakazawa, Takaaki Shimura, Akihiko Mitsuishi, Kaoru Iwamoto, Akira Murata
Proc. ASME. AJKFluids2019, Volume 1: Fluid Mechanics, V001T01A012, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-5691
https://doi.org/10.1115/AJKFluids2019-5691
View Paper titled, LDV Measurement of Turbulent Pipe Flow With Traveling Wavy Elastic Wall for Drag Reduction
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Topics: Drag reduction, Pipe flow, Traveling waves, Turbulence
Proceedings Papers

Effects of Shape and Arrangement of Dimples on Film Cooling Performance Over Cutback Surface at Airfoil Trailing Edge

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Satomi Nishida, Akira Murata, Hiroshi Saito, Yoji Okita, Chiyuki Nakamata, Kaoru Iwamoto
Proc. ASME. GT2013, Volume 3B: Heat Transfer, V03BT13A054, June 3–7, 2013
Publisher: American Society of Mechanical Engineers
Paper No: GT2013-95542
https://doi.org/10.1115/GT2013-95542
View Paper titled, Effects of Shape and Arrangement of Dimples on Film Cooling Performance Over Cutback Surface at Airfoil Trailing Edge
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Topics: Airfoils, Film cooling, Shapes, Heat transfer, Cooling, Heat transfer coefficients, Blades, Gas turbines, Heat, Reynolds number
Proceedings Papers

Experimental Study on Drag-Reduction Effect of a New Sinusoidal Riblet

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Monami Sasamori, Kaoru Iwamoto, Akira Murata
Proc. ASME. FEDSM2012, Volume 1: Symposia, Parts A and B, 945-950, July 8–12, 2012
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM2012-72437
https://doi.org/10.1115/FEDSM2012-72437
View Paper titled, Experimental Study on Drag-Reduction Effect of a New Sinusoidal Riblet
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Topics: Drag reduction, Turbulence
Journal Articles

Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Journal: Journal of Turbomachinery
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2012, 134(5): 051033.
https://doi.org/10.1115/1.4004828
Published Online: May 31, 2012
View Articletitled, Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge
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Topics: Airfoils, Cooling, Film cooling, Flow (Dynamics), Geometry, Heat transfer coefficients, Transients (Dynamics), Diffusers
Proceedings Papers

Experimental Investigation on Effects of Surface Roughness Geometry Affecting to Flow Resistance

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Takahiro Ito, Ayumu Matsumoto, Toshihisa Ito, Masaaki Motozawa, Kaoru Iwamoto, Hideki Kawashima, Hirotomo Ando, Tetsuya Senda, Yasuo Kawaguchi
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3945-3954, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-25014
https://doi.org/10.1115/AJK2011-25014
View Paper titled, Experimental Investigation on Effects of Surface Roughness Geometry Affecting to Flow Resistance
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Topics: Flow (Dynamics), Geometry, Surface roughness, Cylinders, Friction, Sands, Shapes, Gaussian distribution, Torque, Torque measurement
Proceedings Papers

Relationship Between Vortex Structure and Reynolds Shear Stress of Turbulent Drag Reducing Flow With Blowing Polymer Solution From the Wall

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Shota Ishitsuka, Hening Xu, Masaaki Motozawa, Kaoru Iwamoto, Hirotomo Ando, Tetsuya Senda, Yasuo Kawaguchi
Proc. ASME. AJK2011, ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D, 3955-3962, July 24–29, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJK2011-25015
https://doi.org/10.1115/AJK2011-25015
View Paper titled, Relationship Between Vortex Structure and Reynolds Shear Stress of Turbulent Drag Reducing Flow With Blowing Polymer Solution From the Wall
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Topics: Drag (Fluid dynamics), Flow (Dynamics), Polymer solutions, Shear stress, Turbulence, Vortices, Channel flow, Drag reduction, Fluids, Reynolds number
Proceedings Papers

Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 171-181, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45355
https://doi.org/10.1115/GT2011-45355
View Paper titled, Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge
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Topics: Airfoils, Film cooling, Geometry, Heat transfer coefficients, Heat transfer, Cooling, Diffusers, Flow (Dynamics), Gas turbines, Pressure
Proceedings Papers

Heat Transfer Enhancement due to Combination of Dimples, Protrusions, and Ribs in Narrow Internal Passage of Gas Turbine Blade

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Akira Murata, Satomi Nishida, Hiroshi Saito, Kaoru Iwamoto, Yoji Okita, Chiyuki Nakamata
Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 1173-1182, June 6–10, 2011
Publisher: American Society of Mechanical Engineers
Paper No: GT2011-45356
https://doi.org/10.1115/GT2011-45356
View Paper titled, Heat Transfer Enhancement due to Combination of Dimples, Protrusions, and Ribs in Narrow Internal Passage of Gas Turbine Blade
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Topics: Blades, Gas turbines, Heat transfer, Cooling, Pressure, Airfoils, Fins, Friction, Reynolds number, Reynolds-averaged Navier–Stokes equations
Journal Articles

Control of Turbulent Transport: Less Friction and More Heat Transfer

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Nobuhide Kasagi, Yosuke Hasegawa, Koji Fukagata, Kaoru Iwamoto
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. March 2012, 134(3): 031009.
https://doi.org/10.1115/1.4005151
Published Online: January 13, 2012
View Articletitled, Control of Turbulent Transport: Less Friction and More Heat Transfer
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Topics: Friction, Heat, Heat transfer, Momentum, Temperature, Turbulence, Flow (Dynamics), Skin friction (Fluid dynamics), Heat flux, Boundary-value problems
Proceedings Papers

Control of Turbulent Transport: Less Friction and More Heat Transfer

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Nobuhide Kasagi, Yosuke Hasegawa, Koji Fukagata, Kaoru Iwamoto
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 8, 309-324, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-23344
https://doi.org/10.1115/IHTC14-23344
View Paper titled, Control of Turbulent Transport: Less Friction and More Heat Transfer
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Topics: Friction, Heat transfer, Turbulence, Heat, Momentum, Flow (Dynamics), Boundary-value problems, Convection, Design, Entropy
Proceedings Papers

Experimental Study on Turbulent Drag Reduction and Polymer Concentration Distribution With Blowing Polymer Solution From the Channel Wall

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Masaaki Motozawa, Taiki Kurosawa, Hening Xu, Kaoru Iwamoto, Hirotomo Ando, Tetsuya Senda, Yasuo Kawaguchi
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 2, 797-805, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-23199
https://doi.org/10.1115/IHTC14-23199
View Paper titled, Experimental Study on Turbulent Drag Reduction and Polymer Concentration Distribution With Blowing Polymer Solution From the Channel Wall
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Topics: Drag reduction, Polishing equipment, Polymer solutions, Polymers, Turbulence
Proceedings Papers

Heat and Fluid Flow in Expanding Concentric Annular Flow-Passage With Rotating Inner-Wall

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Akira Murata, Kaoru Iwamoto
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 2, 497-506, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22403
https://doi.org/10.1115/IHTC14-22403
View Paper titled, Heat and Fluid Flow in Expanding Concentric Annular Flow-Passage With Rotating Inner-Wall
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Topics: Flow (Dynamics), Fluid dynamics, Heat, Centrifugal force, Exterior walls, Finite difference methods, Flow separation, Inflow, Large eddy simulation, Low temperature
Proceedings Papers

Structure of Low-Speed Streaks in Drag Reducing Flow With Polymer Solution Blown From the Channel Wall

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Hening Xu, Shota Ishitsuka, Masaaki Motozawa, Kaoru Iwamoto, Hirotomo Ando, Tetsuya Senda, Bo Yu, Yasuo Kawaguchi
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T10096, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44462
https://doi.org/10.1115/AJTEC2011-44462
View Paper titled, Structure of Low-Speed Streaks in Drag Reducing Flow With Polymer Solution Blown From the Channel Wall
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Topics: Drag (Fluid dynamics), Drag reduction, Flow (Dynamics), Polymer solutions, Turbulence, Polishing equipment, Particulate matter, Polymers, Reynolds number, Water
Proceedings Papers

A Micropump Driven by Marangoni Effect

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Kenji Sugimoto, Kaoru Iwamoto, Hiroshi Kawamura
Proc. ASME. HT2007, ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1, 223-228, July 8–12, 2007
Publisher: American Society of Mechanical Engineers
Paper No: HT2007-32640
https://doi.org/10.1115/HT2007-32640
View Paper titled, A Micropump Driven by Marangoni Effect
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Topics: Micropumps, Flow (Dynamics), Temperature, Diaphragms (Mechanical devices), Diaphragms (Structural), Circuits, Convection, Fluids, Geometry, Heat conduction