Publications

Papers

2026

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  Flow-history-dependent orientational relaxation in dilute polydisperse colloidal rod suspensions

  • Featured Article

  Yuto Yokoyama, Vincenzo Calabrese, Fabian Hillebrand, Henry J. London, Simon J. Haward, Amy Q. Shen

  Journal of Rheology, 70(6), 1481–1510 (2026)

  • Flow Birefringence
  • Suspensions
  • Rheology
  • OIST

  Published

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  Apparent Breakdown of the Stress-Optic Rule in Rigid-Rod Suspensions: A Stress-Partitioning Interpretation

  William Kai Alexander Worby, Yuto Yokoyama, Misa Kawaguchi, Yoshiyuki Tagawa

  arXiv, 2609.23080 (2026)

  • Flow Birefringence
  • Suspensions
  • Rheology
  • TUAT

  Preprint Open Access

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  Velocity of focused liquid jets induced by impact across rigid and soft substrates

  Ishin Kikuchi, Hiroya Watanabe, Yuto Yokoyama, Hiroaki Kusuno, Yoshiyuki Tagawa

  Journal of Fluid Mechanics, 1041, A6 (2026)

  • Liquid Jet
  • Soft Materials
  • OIST
  • TUAT

  Published Open Access

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  Flow birefringence measurement in a radial Hele-Shaw cell considering three-dimensional effects

  Misa Kawaguchi, William Kai Alexander Worby, Yuto Yokoyama, Ryuta X. Suzuki, Yuichiro Nagatsu, Yoshiyuki Tagawa

  Experimental Thermal and Fluid Science, 176, 111773 (2026)

  • Flow Birefringence
  • Rheology
  • OIST
  • TUAT

  Preprint Open Access

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  Extending flow birefringence analysis to combined extensional-shear flows via Jeffery-Hamel flow measurements

  Miu Kobayashi, William Kai Alexander Worby, Misa Kawaguchi, Yuto Yokoyama, Sayaka Ichihara, Yoshiyuki Tagawa

  Experimental Thermal and Fluid Science, 174, 111708 (2026)

  • Flow Birefringence
  • Rheology
  • TUAT
  • OIST

  Published Open Access

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  Scaling crossover in droplet impact force on elastic substrates

  Yuto Yokoyama, Hirokazu Maruoka, Kaie Matsunuma, Yoshiyuki Tagawa

  Nature Communications, 17(1), 607 (2026)

  • Droplets
  • Photoelasticity
  • Soft Materials
  • TUAT
  • OIST

  Published Open Access

2025

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  Reconstruction of three-dimensional fluid stress field via photoelasticity using physics-informed convolutional encoder-decoder

  Daichi Igarashi, Shunsuke Kumagai, Yuto Yokoyama, Yee Jingzu, Masanobu Horie, Yoshiyuki Tagawa

  arXiv, 2504.15952 (2025)

  • Photoelasticity
  • TUAT
  • OIST

  Preprint Open Access

2024

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  Examination of flow birefringence induced by the shear components along the optical axis using a parallel-plate-type rheometer

  William Kai Alexander Worby, Kento Nakamine, Yuto Yokoyama, Masakazu Muto, Yoshiyuki Tagawa

  Scientific Reports, 14, 21931 (2024)

  • Flow Birefringence
  • Rheology
  • TUAT
  • OIST

  Published Open Access

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  Flow birefringence of cellulose nanocrystal suspensions in three-dimensional flow fields: revisiting the stress-optic law

  Kento Nakamine, Yuto Yokoyama, William Kai Alexander Worby, Masakazu Muto, Yoshiyuki Tagawa

  Cellulose, 31 (2024)

  • Flow Birefringence
  • Suspensions
  • Rheology
  • TUAT

  Published Open Access

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  High-speed photoelastic tomography for axisymmetric stress fields in a soft material: temporal evolution of all stress components

  Yuto Yokoyama, Sayaka Ichihara, Yoshiyuki Tagawa

  Optics and Lasers in Engineering, 178, 108224 (2024)

  • Photoelasticity
  • Soft Materials
  • TUAT

  Published Open Access

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  Optimal standoff distance for a highly focused microjet penetrating a soft material

  Daichi Igarashi, Kento Kimura, Nanami Endo, Yuto Yokoyama, Hiroaki Kusuno, Yoshiyuki Tagawa

  Physics of Fluids, 36, 042005 (2024)

  • Liquid Jet
  • Soft Materials
  • TUAT

  Published Open Access

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  The effects of secondary cavitation position on the velocity of a laser-induced microjet extracted using explainable artificial intelligence

  Daichi Igarashi, Jingzu Yee, Yuto Yokoyama, Hiroaki Kusuno, Yoshiyuki Tagawa

  Physics of Fluids, 36, 013317 (2024)

  • Liquid Jet
  • TUAT

  Published Open Access

2023

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  Integrated photoelasticity in a soft material: phase retardation, azimuthal angle, and stress-optic coefficient

  Yuto Yokoyama, Benjamin R. Mitchell, Ali Nassiri, Brad L. Kinsey, Yannis P. Korkolis, Yoshiyuki Tagawa

  Optics and Lasers in Engineering, 161, 107335 (2023)

  • Photoelasticity
  • Soft Materials
  • TUAT

  Published Open Access

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  An investigation of Hertzian contact in soft materials using photoelastic tomography

  Benjamin Mitchell, Yuto Yokoyama, Ali Nassiri, Yoshiyuki Tagawa, Yannis P. Korkolis, Brad L. Kinsey

  Journal of the Mechanics and Physics of Solids, 171, 105164 (2023)

  • Photoelasticity
  • Soft Materials
  • TUAT

  Published

2022

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  Droplet impact of blood and blood simulants on a solid surface: Effect of the deformability of red blood cells and the elasticity of plasma

  Yuto Yokoyama, Akane Tanaka, Yoshiyuki Tagawa

  Forensic Science International, 331, 111138 (2022)

  • Droplets
  • Suspensions
  • Rheology
  • TUAT

  Published Open Access

2021

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  Effect of liquid elasticity on the behaviour of high-speed focused jets

  Andres Franco-Gomez, Hajime Onuki, Yuto Yokoyama, Yuichiro Nagatsu, Yoshiyuki Tagawa

  Experiments in Fluids, 62, 41 (2021)

  • Liquid Jet
  • Rheology
  • TUAT

  Published Open Access

Japanese Articles

2023

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  高速マイクロジェットの医工学応用と非定常レオロジー画像計測

  田川 義之, 横山 裕杜, 川口 美沙

  バイオマテリアル－生体材料－, 41(3), 216-221 (2023)

  • Liquid Jet
  • Rheology
  • TUAT

  Published

2022

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  流動複屈折計測とインデックスマッチングを複合した円管内流体応力場計測手法の開発

  武藤 真和, ウィリアム・海・アレクサンダー・ウォービー, 中峯 健登, 横山 裕杜, 田川 義之

  日本流体力学会誌, 41(6), 383-386 (2022)

  • Flow Birefringence
  • Rheology
  • TUAT

  Published

2020

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  流体工学 (IV) ―空気薄膜内の潤滑圧力と液滴衝突―

  田川 義之, 横山 裕杜

  日本画像学会誌, 59(1), 165-170 (2020)

  • Droplets
  • TUAT

  Published

Books

2026

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  Chapter 15 - Droplet impact of a rheologically-relevant blood simulant at body temperature

  Alejandro Rubio, Daniel Fernández-Martínez, Yuto Yokoyama, Kotaro Hashimoto, Shun Miyatake, Yoshiyuki Tagawa, Emilio José Vega

  Recent Advances in Hemodynamics and Blood Mimetics, Academic Press, 301-310 (2026)

  • Droplets
  • Rheology
  • TUAT

  Published

2025

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  第2節 ゲル中の応力場計測

  田川 義之, 横山 裕杜

  ゲル化・増粘剤の使い方と新しいゲルの活用事例, 技術情報協会 (2025)

  • Soft Materials
  • TUAT

  Published