Simulation of a Salt-Finger Type Convection and Formation of an Uniform-Density Layer

• Project/Area Number: 19740242
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Nihon University
• Principal Investigator: KOMURASAKI Satoko Nihon University, 理工学部, 講師 (90318361)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,440,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥240,000); Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2007: ¥2,400,000 (Direct Cost: ¥2,400,000)
• Keywords: 流体数値シミュレーション / 二重拡散対流 / ソルトフィンガー / 密度成層 / 海洋 / 均一密度層 / 数値シミュレーション / 対流 / 均一層

Research Abstract

海洋等において見られるソルトフィンガー型二重拡散対流において、温度と塩分濃度均一層の形成と維持について、そのメカニズムの解明を目的として流体の数値シミュレーションを行った。そして、ある特定の海域で見られるような水深とともに温度・塩分濃度が階段状に減少していく分布、すなわち幾重にも重なる均一層の、各層の形成と維持において、ある特徴的な対流の存在が大きく関わっている可能性を示した。(通常の海域では温度・塩分濃度分布は階段状とはならず、両者とも緩やかに水深と共に減少する分布となる)

Research Products

• [Journal Article] Kunio Kuwahara and Tetuya Kawamura, (2008)
  • Author(s): Satoko Komurasaki
  • Journal Title: "Simulation of a Double Diffusive Convection for Salt Fingers and Formation of Uniform-Density Layer" (AIAA) Pages: 2008-575
  • Peer Reviewed
• [Journal Article] Simulation of a Double Diffusive Convection for Salt Fingers and Form ation of Uniform-Density Layer (2008)
  • Author(s): 小紫 誠子
  • Journal Title: AIAA paper 2008-575
  • Peer Reviewed
• [Presentation] Numerical Experiments on Salt Finger Type Convection (2008)
  • Author(s): Satoko Komurasaki, Kunio Kuw ahara
  • Organizer: 61st Annual Meeting of the American Physical Society' s Division of Fluid Dynamics
  • Place of Presentation: San Antonio, Texas, USA
  • Year and Date: 2008-11-23
• [Presentation] Simulation of a Double Diffusive Convection for Salt Fingers and Form ation of Uniform-Density Layer (2008)
  • Author(s): 小紫 誠子
  • Organizer: 46th AIAA Aerospace Sciences Meeting and Exhib it
  • Place of Presentation: Reno, Nevada, USA
  • Year and Date: 2008-01-09
• [Presentation] Numerical Experiments on Salt Finger Type Convection (2008)
  • Author(s): Satoko Komurasaki and Kunio Kuwahara
  • Organizer: 61st Annual Meeting of the American Physical Society's Division of Fluid Dynamics
  • Place of Presentation: San Antonio, TX, USA
• [Presentation] Simulation of a Double Diffusive Convection for Salt Fingers and Formation of Uniform-Density Layer (2008)
  • Author(s): Satoko Komurasaki, Kunio Kuwahara and Tetuya Kawamura
  • Organizer: 46th AIAA Aerospace Sciences Meeting and Exhibit
  • Place of Presentation: Reno, NV, USA