Fukuda Tomoo

写真a

Title

Associate Professor

Researcher Number(JSPS Kakenhi)

00709694
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Faculty of Engineering   School of Engineering_Civil Engineering Program   Associate Professor  

  • Concurrently   University of the Ryukyus   Graduate School of Engineering and Science   Associate Professor  

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Research Interests 【 display / non-display 】

  • 水理学

  • 河川工学

  • 計算力学

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Published Papers 【 display / non-display 】

  • INVESTIGATION ON TURBULENT STRUCTURE OF SEDIMENT FLOWS OF SINGLE SIZED PARTICLE BY USING THREE-DIMENSIONAL SOLID-FLUID MULTIPHASE SIMULATION

    Eiji YAMAGUCHI, Tomoo FUKUDA, Wataru IWAKIRI

    Annual Journal of Hydraulic Engineering, JSCE   78 ( 2 ) I_895 - I_900   2022.11 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Investigation on countermeasures against flood and sediment disaster by using Interface-Resolved Simulation

    Tomoo Fukuda, Shoji Fukuoka

      41 ( 3 ) 184 - 191   2022.06 [ Peer Review Accepted ]

    Type of publication: Research paper (other science council materials etc.)

  • INVESTIGATION OF THE EFFECT OF TRAPPING DEBRIS FLOW OF OPEN CHECK DAMS WITH CONVEX STEEL FRAMES BY USING HIGH-RESOLUTION SIMULATIONS OF DEB RIS FLOW INCLUDING DRIFTWOOD

    Tomoo Fukuda, Shoji Fukuoka

    Annual Journal of Hydraulic Engineering, JSCE   57 ( 2 ) I_1177 - I_1182   2020.11 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Interface-resolved large eddy simulation of a field debris flow with large stones and woods

    福田 朝生

    THESIS-2019, Newark, Delaware, USA, 2019.9.     2019.09 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

  • Interface-resolved large eddy simulations of hyperconcentrated flows using spheres and gravel particles

    Tomoo Fukuda, Shoji Fukuoka

    ADVANCES IN WATER RESOURCES ( ELSEVIER SCI LTD )  129   297 - 310   2019.07

    Type of publication: Research paper (scientific journal)

    　View Summary

    Interface-resolved large eddy simulations were performed to reproduce hyperconcentrated water-particle mixture flows in a laboratory experiment conducted by Egashira et al. (2001). The flows were simulated at sediment concentrations of 0.196 and 0.444 using spheres and gravel particles. Simulations using gravel with a suitable shape properly reproduced the discharge rates of water and particles as well as the wall-normal distributions of the particle velocities in the experiments. The study involved an examination of the effects of particle shapes and the coefficients of contact forces (coefficients of restitution and friction angles of particle surfaces) used in the discrete element method on mixture flows. Significantly different flows were obtained for spherical and gravel particles under dense conditions, whereby the particle shear stress became much greater than that for water. The simulations of spheres at different coefficients of contact forces could not adequately represent the mixture flows of nonspherical particles.

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Other Papers 【 display / non-display 】

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Academic Awards 【 display / non-display 】

  • Kyoto Young Dam Engineers Award International Symposium on DAMS FOR ACHANGING WORLD

    2012.06   ICOLD   Study on Flushing Mechanism of Dam Reservoir Sedimentation and Recovery of Riffle-Pool in Downstream Reach by a Flushing Bypass Tunnel

    Winner: Tomoo Fukuda

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Numerical investigation on stability of gravel bags in flooding as flexible riverbank protection works and a new design method

    Grant-in-Aid for Scientific Research(C)

    Project Year: 2019.04  -  2022.03 

    Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

  • Effects of sizes and shapes of particles on water and particle motions and bed structures in gravel-bed rivers

    Grant-in-Aid for Research Activity start-up

    Project Year: 2013.08  -  2015.03 

    Investigator(s): FUKUDA TOMOO 

    Direct: 2,100,000 (YEN)  Overheads: 2,730,000 (YEN)  Total: 630,000 (YEN)

    　View Summary

    We conducted numerical mixed-size gravel movable-bed experiments using a numerical movable-bed channel capable of simulating motions of flow and gravel. To investigate effects of particle sizes on their motions, contact forces of moving particles exerted in collision with movable bed were measured for each particle size in the experiment. The result showed that relatively large particles received more upward contact forces than those of small particles. We also conducted numerical movable-bed experiments with spheres. Effects of particle shapes on gravel motions were investigated by the comparison between gravel and sphere motions. The result showed that a difference of fractional sediment transport rates of gravel was smaller than that of spheres.

  • Investigation of dynamic mechanisms near river beds employing a numerical mixed-size movable-bed channel with arbitrary shaped particles

    Grant-in-Aid for challenging Exploratory Research

    Project Year: 2013.04  -  2015.03 

    Investigator(s): FUKUOKA SHOJI, UCHIDA Tatsuhiko, FUKUDA Tomoo 

    Direct: 3,100,000 (YEN)  Overheads: 4,030,000 (YEN)  Total: 930,000 (YEN)

    　View Summary

    We developed a numerical movable-bed channel capable of simulating three-dimensional motions of flows and gravel particles in different shapes. Flow and gravel motions and forces exerting them that have been difficult to measure were predicted by numerical movable-bed experiments. The result of the experiments showed that large particles were nearly in rectilinear motions in upper positions on the bed surface and small particles took detours in the lower positions. It was also showed that relatively large particles affected greatly by their shapes in motion and settlement.

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