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Unveiling the interaction between pore structure and pore-fluid flow in landfills using topological data analysis

Research Project

Project/Area Number 16K00594
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental engineering and reduction of environmental burden
Research InstitutionCenter for Environmental Science in Saitama

Principal Investigator

Suzuki Kazuyuki  埼玉県環境科学国際センター, 資源循環・廃棄物担当, 専門研究員 (70379824)

Research Collaborator Suito Hiroshi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords廃棄物最終処分場 / 埋立層 / 間隙構造 / 数値シミュレーション / パーシステントホモロジー / パーシステント図 / 位相的データ解析 / 壁面せん断応力 / 多変量解析 / 廃棄物埋立層 / 数値流体解析 / 安定化有限要素法 / GPGPU / 並列計算 / パーシステントホモロジー群
Outline of Final Research Achievements

The fluid flow dynamics of the landfill affect the micro-structure of pores in the waste-filled layer. However, there was no adequate method to represents the shape of complicated pore geometries. Recently, topological data analysis (TDA) has been developed as a new approach to characterize the shape of data quantitatively and has been applied to various practical problems such as materials science. In this study, persistent homology and its persistence diagram were used as TDA to analyze the pore structure in waste materials. Persistence diagram was calculated from the data of micro X-ray computed tomography (CT) images of waste materials such as bottom ash and incombustible residue. Then, the pore-fluid flow in waste materials was calculated using CFD. Finally, we investigated relationship between obtained geometry parameters using TDA and simulated pore flow dynamics in landfill.

Academic Significance and Societal Importance of the Research Achievements

本研究の位相幾何学的なアプローチは、廃棄物最終処分場のみならず、同様の多孔質材料に適用可能と考えられ、環境、材料科学、資源開発等、幅広い分野への展開が期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (5 results)

All 2019 2018 2017 2016

All Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 安定化有限要素法による廃棄物最終処分場間隙流れの数値シミュレーション2019

    • Author(s)
      鈴木和将,Huynh Quang Huy Viet, 宇田智紀, 水藤寛
    • Organizer
      平成30年度廃棄物資源循環学会関東支部研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 数値シミュレーションによる廃棄物層間隙流れの流体力学特性の評価2018

    • Author(s)
      鈴木和将,Huynh Quang Huy Viet, 宇田智紀, 水藤寛
    • Organizer
      第29回廃棄物資源循環学会研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Numerical simulation of pore-fluid in landfills using stabilized finite element method2018

    • Author(s)
      Kazuyuki Szuki, Huynh Quang Huy Viet, Tomoki Uda, Hiroshi Suito
    • Organizer
      The 10th Asia-Pacific Landfill Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] GPUスパコンを用いた廃棄物埋立層内の数値流体シミュレーション2017

    • Author(s)
      鈴木和将、Huynh Quang Huy Viet、水藤寛
    • Organizer
      廃棄物資源循環学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 廃棄物最終処分場における埋立層間隙内の気液二相流数値解析2016

    • Author(s)
      鈴木和将、水藤寛
    • Organizer
      廃棄物資源循環学会
    • Place of Presentation
      和歌山大学
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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