PhD Thesis (2024)
Diffusion of Particles in Structureless Media
Publications & Presentations
Preprints
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Amplified transport variability in granular slope flows near the critical angle
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Granular Rods Fall Faster in Denser Obstacle Fields
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Steady shear rheology of a granular crystal containing a single dislocation
Journal Articles
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Anomalous phonon dispersion near yielding in athermal crystals
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Dislocation Glides in Granular Media
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Reducing segregation in vibrated binary-sized granular mixtures by excessive small particle introduction
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Effect of Mass on Single File Diffusion
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Analysis of Non-Gaussian Diffusion of Hydrogen and Oxygen in Cement Paste Using a Two-State Fluctuating Diffusivity Model
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Brownian yet non-Gaussian diffusion of a light particle in heavy gas: Lorentz-gas-based analysis
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Gas diffusion in cement pastes: An analysis using a fluctuating diffusivity model
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Increase in rod diffusivity emerges even in Markovian nature
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Fluctuating diffusivity emerges even in binary gas mixtures
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Short-time dynamics of a tracer in an ideal gas
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Effect of Inertia on Linear Viscoelasticity of Harmonic Dumbbell Model
Proceedings
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Dislocation Glides in Monolayered Granular Media: Effect of Lattice Constant
International Conference Presentations
2026
- , “Yielding in crystalline granular media,” Asia Pacific Society of Rheology Workshop 2026 in Osaka, Osaka University, Engineering Science International Hall, Osaka, Japan, 5 Jun 2026. (invited talk)
2025
- , Takashi Uneyama, Yuto Sasaki, Kiwamu Yoshii, and Hiroaki Katsuragi, “Dislocation Glides in Monolayered Granular Media: Effect of Lattice Constant,” Powders and Grains 2025, Goa, India, 8–12 Dec 2025. (oral)
- , Takashi Uneyama, Yuto Sasaki, Kiwamu Yoshii, and Hiroaki Katsuragi, “Granular Media Exhibit Dislocation Glide,” Soft and Liquid Matter Physics: Past, Present and Future, P50, Tokyo, Japan, 10–13 Mar 2025. (poster)
2024
- and Kiwamu Yoshii, “Reducing Segregation in Vibrated Binary-Sized Granular Mixtures by Excessive Small Particle Introduction,” Long-term Workshop on Frontiers in Non-equilibrium Physics 2024, No. 4, Kyoto, Japan, 29 Jul–2 Aug 2024. (poster)
- and Takashi Uneyama, “Theoretical analysis of Brownian yet non-Gaussian diffusion in gas,” The 17th International Workshop for East Asian Young Rheologist, P15, Busan, Korea, 23–26 Jan 2024. (oral and poster)
2023
- , M. Kröger, T. Ishida, T. Uneyama, Y. Doi, and Y. Masubuchi, “Increase in Rod Diffusivity Emerges even in Markovian Nature,” 19th International Congress on Rheology, Athens, Greece, 31 Jul–4 Aug 2023. (oral)
- and T. Uneyama, “Fluctuating diffusivity emerges even in binary gas mixtures,” STATPHYS28, Tokyo, Japan, 7–11 Aug 2023. (oral)
- , Yuichi Masubuchi, Yuya Doi, Takato Ishida, and Takashi Uneyama, “Fluctuating Diffusivity Emerges Even in Binary Gas Mixtures,” The 16th International Workshop for East Asian Young Rheologist, L11, Udon Thani, Thailand, 18–21 Feb 2023. (long oral)
2022
- , “Fluctuating diffusivity emerges even in binary gas mixtures,” Nagoya Workshop on Molecular Simulations of Soft Matters 2022, Nagoya, Japan, 17 Nov 2022. (solicited oral presentation)
2021
- , Takashi Uneyama, Yuya Doi, and Yuichi Masubuchi, “Single collision statistics of tracer particle in dilute hard sphere gas,” Pacifichem 2021, #269, 3586249, 18 Dec 2021. (oral)
2020
- , Yuichi Masubuchi, and Takashi Uneyama, “Short time scale dynamics of tracer particle in ideal gas,” 18th International Congress on Rheology, CS99, Rio de Janeiro, Brazil (online), 17 Dec 2020. (oral)
- , Takashi Uneyama, and Yuichi Masubuchi, “Diffusion coefficient of tracer in ideal gas,” Grand Views of Soft and Liquid Matter Physics, Poster No. 51, Tokyo, Japan, 9–12 Mar 2020. (poster; cancelled due to COVID-19)
- , Takashi Uneyama, and Yuichi Masubuchi, “In dilute fluid, diffusion coefficient of tracer depends on its mass,” The 15th International Workshop for East Asian Young Rheologist, P07, Changchun, China, 9 Jan 2020. (oral and poster)
2019
- , Takashi Uneyama, and Yuichi Masubuchi, “Small particles drive vibration of large particle,” The 14th International Workshop for East Asian Young Rheologist, P10, Nagoya, Japan, 24 Jan 2019. (oral and poster)
Conference Presentations in Japan
2026
- , “Rod-Shaped Particles Fall Faster as Obstacles Increase,” Autumn Meeting of the Society of Powder Technology, Japan 2026, General-17, Tokyo Big Sight, 24 Nov 2026. (oral; scheduled)
- , “Steady-State Rheology of Granular Media with a Dislocation,” 74th Autumn Rheology Conference, 2F15, Shiiki Hall, Ito Campus, Kyushu University, 20 Oct 2026. (oral)
- , M. Otsuki, K. Saitoh, and H. Katsuragi, “Vibrational Properties of Athermal Crystal near Shear Yielding,” 53rd Annual Meeting of the Society of Rheology, Japan, 06, Nambu Yoichiro Hall, Toyonaka Campus, The University of Osaka, 5 Jun 2026. (oral)
2025
- , Takashi Uneyama, Yuto Sasaki, Kiwamu Yoshii, and Hiroaki Katsuragi, “Dislocation Glides in Granular Media: Analysis Using the Discrete Element Method,” 73rd Autumn Rheology Conference, Aore Nagaoka, 14–16 Oct 2025. (oral)
2024
- , “Structure and Rheology of Granular Media,” 87th Meeting of the Kansai Rheology Society, Kyoto University, 24 Dec 2024. (invited lecture)
- , Takashi Uneyama, Yuto Sasaki, Kiwamu Yoshii, and Hiroaki Katsuragi, “Dislocation Glides in Granular Media,” 12th Soft Matter Conference, Osaka University, 16–18 Dec 2024. (oral)
- , K. Yoshii, and H. Katsuragi, “Elimination of Size Segregation in Vibrated Granular Mixture through Excessive Addition of Small Particles,” Autumn Meeting of the Society of Powder Technology, Japan, Tokyo Big Sight, 27 Nov 2024. (oral)
- , K. Yoshii, and H. Katsuragi, “Suppression of Segregation by Excessive Small Particle Addition in Binary Granular Systems,” 72nd Autumn Rheology Conference, Yamagata Terrsa, 17 Oct 2024. (oral)
2023
- and K. Yoshii, “Simulation Analyses for a Phase-Separation-Like Structure of a Quasi-Two-Dimensional Binary-Sized Granular Mixture Subjected to Vertical Vibration,” 71st Autumn Rheology Conference, Matsuyama City Community Center, Ehime, 19 Oct 2023. (poster)
- , “Unusual Diffusion of a Ballistic Rod-Shaped Particle in Fixed Obstacles,” 187th Tokai Polymer Research Meeting, Nagoya Institute of Technology, 9 Sep 2023. (student-requested oral presentation)
2022
- , Y. Masubuchi, T. Uneyama, Y. Doi, T. Ishida, and Martin Kröger, “Diffusion Coefficient of Rod-Like Particles Moving in Obstacles,” 10th Soft Matter Research Meeting, PB08, Kyushu University Nishijin Plaza, 22 Nov 2022. (poster)
- , Y. Masubuchi, T. Uneyama, Y. Doi, T. Ishida, and Martin Kröger, “Diffusion of Rod-Like Particles Moving in Fixed Needle-Like Obstacles,” 70th Rheology Conference, 1A05, Kanazawa Opera House, 13 Oct 2022. (oral)
- , Y. Masubuchi, T. Uneyama, Y. Doi, T. Ishida, and Martin Kröger, “Simulation Analysis of Rod-Like Particles Moving in Obstacles,” 183rd Tokai Polymer Research Meeting, P27, Nagoya University, 17 Sep 2022. (poster)
- , Y. Masubuchi, Y. Doi, T. Ishida, and T. Uneyama, “Non-Gaussian Normal Diffusion Occurs in a Two-Component Gas,” The Physical Society of Japan Autumn Meeting 2022, 13pH121, Tokyo Institute of Technology, 13 Sep 2022. (oral)
- , Y. Masubuchi, Y. Doi, and T. Uneyama, “Non-Gaussian Diffusion Behavior of Light Particles over a Long Time in a Two-Component Gas,” 49th Annual Meeting of the Society of Rheology, SOP19, online, 12 May 2022. (short oral)
2021
- , Y. Masubuchi, Y. Doi, T. Ishida, and T. Uneyama, “Thermodynamic Potential of an Infinitely Thin Rigid Rod Whose Center of Mass Is Constrained on a Straight Line in a Two-Dimensional Plane,” The Physical Society of Japan Autumn Meeting 2021, 21pM1-06, online, 21 Sep 2021. (oral)
- , T. Uneyama, and Y. Masubuchi, “Theoretical Analysis of Short-Time Dynamics of a Tracer in a One-Dimensional Fluid,” 48th Annual Meeting of the Society of Rheology, Lecture No. 15, online, 14 May 2021. (oral)
- , “Short-Time Motion of Particles in an Ideal Gas Focusing on Collisions,” 39th Western Japan Branch Master’s Presentation Meeting (Kansai Area Master’s Presentation Meeting), B08, 2 Mar 2021. (oral)
2020
- , T. Uneyama, Y. Doi, and Y. Masubuchi, “Velocity Change Due to One Collision of Particles in an Ideal Gas in Any Dimension,” 34th Molecular Simulation Symposium, online, 15 Dec 2020. (poster)
- , Y. Doi, T. Uneyama, and Y. Masubuchi, “Velocity Change Due to Collision of Particles in an Ideal Gas in Any Dimension,” 13th Western Japan Branch Student Workshop, Presentation 10, online, 23 Oct 2020. (oral)
- , Y. Doi, T. Uneyama, and Y. Masubuchi, “Velocity Change Due to Collision of Particles in an Ideal Gas in Any Dimension,” 68th Rheology Conference, P35, online, 22–23 Oct 2020. (poster)
- , T. Uneyama, and Y. Masubuchi, “Mass Dependence of the Diffusion Coefficient of Tracers in an Ideal Gas,” 75th Annual Meeting of the Physical Society of Japan, 17aK45-6, Nagoya, 17 Mar 2020. (oral; on-site meeting cancelled due to COVID-19; presentation recognised upon abstract submission)
2019
- , T. Uneyama, and Y. Masubuchi, “Short-Time Dynamics of Particles in an Ideal Gas,” 33rd Molecular Simulation Symposium, Oral 304S, Poster 114P, Nagoya, 9 Dec 2019. (oral and poster)
- , T. Uneyama, and Y. Masubuchi, “Short-Time Dynamics of Tracers in an Ideal Gas,” 9th Soft Matter Research Meeting, P10, Nagoya, 26 Nov 2019. (poster)
- , T. Uneyama, and Y. Masubuchi, “Analysis of the Velocity Correlation Function of Tracers in a Fluid Based on the Probabilistic Process of Collision,” The Physical Society of Japan Autumn Meeting 2019, 13aPS40, Gifu, 13 Sep 2019. (poster)
- , T. Uneyama, and Y. Masubuchi, “Unique Vibration Mechanism of Large Particles in Fluid: Mechanism Change Due to Density,” 46th Annual Meeting of the Society of Rheology, P15, Kyoto, 8 May 2019. (poster)
2018
- , T. Yamamoto, T. Uneyama, and Y. Masubuchi, “Analysis of the Brazil Nut Phenomenon Focusing on the Pressure Distribution of Granular Materials,” 32nd Molecular Simulation Symposium, 140P, Tsukuba, 28 Nov 2018. (poster)
Theses
Master’s Thesis (2021)
Short-time dynamics of a tracer particle in an ideal gas