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2000 Fiscal Year Final Research Report Summary

Development of 2-Phase CFD Models for Marine Environmental Issues

Research Project

Project/Area Number 10305074
Research Category

Grant-in-Aid for Scientific Research (A).

Allocation TypeSingle-year Grants
Section一般
Research Field 海洋工学
Research InstitutionThe University of Tokyo

Principal Investigator

MIYATA Hideaki  Univ.Tokyo, Environmental and Ocean Eng., Prof., 大学院・工学系研究科, 教授 (70111474)

Co-Investigator(Kenkyū-buntansha) SUZUKI Hideyuki  Univ.Tokyo, Environmental and Ocean Eng., Assoc.Prof., 大学院・工学系研究科, 助教授 (00196859)
FUJINO Masataka  Univ.Tokyo, Environmental and Ocean Eng., Prof., 大学院・工学系研究科, 教授 (10010787)
SATO Toru  Univ.Tokyo, Environmental and Ocean Eng., Assoc.Prof., 大学院・工学系研究科, 助教授 (30282677)
PARK Jong-chun  Univ.Tokyo, Environmental and Ocean Eng., Assistant, 大学院・工学系研究科, 助手 (80323541)
BABA Nobuhiro  Osaka Prefecture Univ., Marine System Eng., Assoc.Prof., 工学部, 助教授 (10198947)
Project Period (FY) 1998 – 2000
KeywordsCFD / two-phase flow / mass transfer / marine environments / greenhouse gas effect / bubble flow / droplet
Research Abstract

We often face two/multi-phase problems in marine environmental issues, such as the ocean sequestration of carbon dioxide, which is regarded as one of feasible and economical choices to reduce carbon dioxide in the atmosphere. Here the problem is the biological impact of CO2-rich seawater. Therefore, it is very important to simulate the dilution process of carbon dioxide in the deep ocean numerically. When one considers marine environmental issues from a viewpoint of fluid dynamics, he/she finds that there are several special scales in these problems. We picked up two rather small scales in this research project. One is the droplet scale (0.001-0.1m), and the other is the very local ocean scale (100-1000m).
For the droplet scale, there are two kinds of numerical methods to solve flows with interfaces : i.e. the front-capturing and front-tracking methods. We have developed two new numerical simulation codes in this scale, each of which corresponds to each of the methods, respectively. The … More front-capturing type utilizes the marker density concept to express the position and shape of the interface and solved the relationship between oscillatory deformation of a rising droplet and vertex shedding from it. In the front-tracking type, we adopt moving unstructured mesh systems and newly developed very thin layer method to solve high Schmidt number problems about a droplet. By this method, numerically empirical equations can be generated for the dissolution from a rising and deforming droplet. This equation can be used in the following larger-scale simulations as a sub-class model.
In the very local ocean scale, droplets are not treated individually but as volume fraction and number density. Therefore, this type of simulations manages to elucidate the behavior of droplet plume near the injection point in the deep ocean. Moreover, the chemical process of dissolution of carbon dioxide into seawater and its biological impact to individual organism are simultaneously solved. The results said that the pH experience each organism suffers hardly causes mortality for the amount of CO2 and injection period we set reasonably in the simulations. We also did plume-behavior experiments in room size and compared well the results with those of numerical simulations. Less

  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Toru Sato, Rho-Teak Jung, Shinji Abe: "Direct Simulation of Droplet Flow with Mass Transfer at Interface"J.Fluids Eng.. Vol.122 No.3. 510-516 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toru Sato,Terumi Hama: "Numerical Simulation of LCO2 Droplet Plume in the Deep Ocean"Proc.ASME Fluids Eng.Div.Summer Meeting. FEDSM2000-11149. 1-6 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Toru Sato,Terumi Hama: "Numerical Simulation of Dilution Process in CO2 Ocean Sequestration"Proc.5th Int.Conf.On Greenhouse Gas Control Tech. B4-2. 1-6 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rho-Teak Jung,Toru Sato: "Direct numerical simulation on single-droplet flow with mass transfer"Chem.Engng.Tech.. (In press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Rho-Teak Jung,Toru Sato: "A numerical solver for high Schmidt number problems about a droplet by using moving unstructured mesh"Proc.ASME Fluids Eng.Div.Summer Meeting. (To appear). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 佐藤圭,佐藤徹: "成層流体中の気泡プルームの挙動に関する研究"J.Soc.Naval Archit.Jpn. (In press). (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shinji Abe, Toru Sato, Rho-Teak Jung. Hideaki Miyata: "Numerical simulation of droplet flow with mass transfer through interface"J.Soc.Naval Archit.Jpn.. Vol.184. 221-226 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato, Shinji Abe, Hideaki Miyata: "Numerical simulation of droplet flow with mass transfer through the interface"Proc.ASME FEDSM98-5209. 1-5 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato: "Numerical simulation of LCO2 droplets in deep ocean"Proc.4th Int.Conf.On Greenhouse Gas Control Tech.. 1057-1059 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Katayama, K.Imamura, T.Sato, R.-T.Jung, Y.Tsuchiya: "A study of movement and mass transfer at the liquid-liquid interface"Bull Visual.Soc.Jpn.. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Terumi Hama, Toru Sato: "Numerical simulation of LCO2 droplet plume at the middle depth of deep ocean"J.Soc.Naval Archit.Jpn.. Vol.185. 127-132 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Terumi Hama, Toru Sato: "CFD simulation of CO2 Sequestration in the deep ocean with bottom inclination"Proc.15th Ocean Engng.Symp.. 361-366 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato: "Can we make the biological impacts of CO_2 negligible by dilution? -Dilution process from the view point of fluid dynamics-"Proc.2nd Int.Symp.on Ocean Sequestration of Carbon Dioxide. 20-28 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato, Rho-Teak Jung, Shinji Abe: "Direct Simulation of Droplet Flow with Mass Transfer at Interaface"J.Fluids Eng.. Vol.122, No.3. 510-516 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato, Terumi Hama: "Numerical Simulation of Dilution Process in CO2 Ocean Sequestration"Proc.ASME FEDSM2000-11149. 1-6 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato, Terumi Hama: "Numerical Simulation of LCO2 Droplet Plume in the Deep Ocean"Proc.5th Int.Conf.On Greenhouse Gas Control Tech. B4-2. 1-6 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Rho-Teak Jung, Toru Sato: "Direct numerical simulation on single-droplet flow with mass transfer"Chem.Engng.Tech.. (in press). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kei Sato, Toru Sato: "An experimental and numerical study on bubble plume behavior in stratification"J.Soc.Naval Archit.Jpn.. Vol.189(to appear). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Rho-Teak Jung, Toru Sato: "Very thin layer method for solving high Schmidt number flow on unstructured hybrid mesh"J.Soc.Naval Archit.Jpn.. Vol.189(to appear). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Toru Sato, Kei Sato: "CFD simulation of plume behavior and model prediction of biological impacts in CO_2 ocean sequestration"Proc.20th Int.Conf.OMAE2001/OSU-5162. (to appear). (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Rho-Teak Jung, Toru Sato: "A numerical solver for high Schmidt number problems about a droplet by using moving unstructured mesh"Proc.ASME FEDSM. (to appear). (2001)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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