Development of mathematical model of the size of bubbles seeping from seabed

2013 Fiscal Year Final Research Report

• Project/Area Number: 24656524
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Naval and maritime engineering
• Research Institution: The University of Tokyo
• Principal Investigator: SATO Toru 東京大学, 新領域創成科学研究科, 教授 (30282677)
• Project Period (FY): 2012-04-01 – 2014-03-31
• Keywords: CO2海域地中貯留 / CO2漏洩の環境影響 / 海底堆積層 / 気泡径 / 砂粒子径 / 気固液三相流 / 水槽実験 / 格子ボルツマン法

Research Abstract

sub-seabed storage has the risk of seepage due to the accidental failure of pipeline infrastructure or large diastrophism like a big earthquake. CO2 bubble size is an important parameter to estimate its environmental impact, because it affects the rise velocity of the bubbles and the dissolution rate of CO2 into seawater. Using the water tank, in which various sand is packed with water, air was poured in from the bottom and, then, the bubble size was measured when they seeped out from the sediment surface.
Moreover, a numerical simulation code was developed adopting the lattice Boltzmann method to analyze gas-water-sand three-phase flow. In the model, an equation of motion of each sand grain was solved directly, considering the collision of particles each other.

Research Products

• [Presentation] Dmitry Aleynikc : Numerical simulation of the diffusion of CO2 purposefully seeping from seabed in a small bay (2013)
  • Author(s): Chiaki Mori, Toru Sato, Yuki Kano
  • Organizer: American Geophysical Union 2013 fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 20131209-13
• [Presentation] CCSの環境影響評価法の現状 (2013)
  • Author(s): 佐藤徹、森千晶
  • Organizer: 平成24年度資源素材学会春季講演会
  • Place of Presentation: 千葉工業大学津田沼キャンパス6号館
  • Year and Date: 20130328-29
  • Invited
• [Presentation] 半閉鎖湾内のCO2拡散に関するマルチスケール数値モデリング (2013)
  • Author(s): 森千晶、佐藤徹、加野友紀、ALEINIK, Demitry
  • Organizer: 第18回動力・エネルギー技術シンポジウム
  • Place of Presentation: 千葉大学西千葉キャンパスけやき会館
  • Year and Date: 2013-06-20
• [Presentation] 砂状堆積物から漏出する気泡サイズに関する研究 (2013)
  • Author(s): 佐藤徹
  • Organizer: 船舶海洋工学会海洋環境研究会
  • Place of Presentation: 大阪大学U2棟2階会議室
  • Year and Date: 2013-04-03
• [Presentation] CO2海域貯留技術の環境影響評価について (2012)
  • Author(s): 佐藤徹
  • Organizer: 第16回海洋深層水利用学会全国大会
  • Place of Presentation: 東京都大島町開発総合センター2F大集会室
  • Year and Date: 20121108-09
  • Invited
• [Presentation] Lattice Boltzmann simulation of gas-water two-phase interface and estimation of relative permeability in spherical grain sediment (2012)
  • Author(s): Honoka Torii, Yuki Kano, Ayako Fukumoto, Toru Sato
  • Organizer: 11th Int. Conf. on Gas in Marine Sediments
  • Place of Presentation: Nice, France
  • Year and Date: 20120904-07
• [Presentation] 海洋開発と混相流 (2012)
  • Author(s): 佐藤徹
  • Organizer: 第31回混相流シンポジウム
  • Place of Presentation: 東京大学柏キャンパス環境棟FSホール
  • Year and Date: 20120808-09
  • Invited