Model experiments for outgassing from bubbly magmas

• Project/Area Number: 21740326
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Solid earth and planetary physics
• Research Institution: The University of Tokyo
• Principal Investigator: NAMIKI Atsuko 東京大学, 大学院・理学系研究科, 助教 (20450653)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 火山 / 噴火 / 脱ガス / 減圧 / せん断 / キャピラリー数 / 気泡

Research Abstract

Whether bubbles in magmas can segregate (outgas) from the liquid magma determines eruption styles. Previous studies using solid pumice/scoria have suggested that steady permeable flow causes outgassing. In this study, I perform a model experiment of outgassing from a liquid foam and show that such a steady permeable flow does not occur. I also formulate an equation to explain the outgassing volume from liquid foam quantitatively.

Research Products

• [Journal Article] Excitation of airwaves caused by bubble bursting in a cylindrical conduit : Experiments and a model (2010)
  • Author(s): T. Kobayashi, A. Namiki, & I. Sumita
  • Journal Title: J. Geophys. Res. Volume: 115 Issue: B10
  • DOI: 10.1029/2009jb006828
  • Peer Reviewed
• [Presentation] An empirical scaling of shearinduced outgassing during magma ascent (2012)
  • Author(s): A. Namiki
  • Organizer: EG U General Assembly
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2012-04-26
• [Presentation] Excitation of Airwaves Caused by Bubble B ursting in a Cylindrical Conduit : Experiment s and a Model (2011)
  • Author(s): A. Namiki, T. Kobayashi, and I. Sumita
  • Organizer: IUGG
  • Place of Presentation: Melbourne Australia
  • Year and Date: 2011-07-02
• [Presentation] Excitation of Airwaves Caused by Bubble Bursting in a Cylindrical Conduit : Experiments and a Model (2011)
  • Author(s): A.Namiki, T.Kobayashi, I.Sumita
  • Organizer: IUGG
  • Place of Presentation: Melbourne Australia
  • Year and Date: 2011-07-02
• [Presentation] 気泡を含む高粘性流体の減圧膨張の実験 (2009)
  • Author(s): 並木敦子
  • Organizer: 日本流体力学会 年会2009
  • Place of Presentation: 東京都文京区 東洋大学
  • Year and Date: 2009-09-02
• [Remarks]
  • URL: http://www-solid.eps.s.u-tokyo.ac.jp/~namiki
• [Remarks]
  • URL: http://www-solid.eps.s.u-tokyo.ac.jp/~namiki/