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Numerical Simulation of Instability in Wind Accretion Flow

Research Project

Project/Area Number 05640350
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 素粒子・核・宇宙線
Research Institutionkobe University

Principal Investigator

MATSUDA Takuya  Kobe University, Department of Earth and Planetary Sciences, Professor, 理学部, 教授 (20026206)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1993: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsAccretion / Binary System / Simulation / Hydrodynamics / 星風降着流 / 降着流 / 数値液体力学 / 宇宙気体力学 / 数値流体力学 / シミュレーション / GRAPE
Research Abstract

We considered a close binary system consisted by a compact object, such as a black hole, a neutron star or a white dwarf, and a companion star, such as a giant or a main sequence star. And we performed numerical simulations of accretion flows in it. There are two types of accretion flows, i.e. a wind accretion flow and an accretion disc. We considered both cases.
As to wind accretion, I cooperated with E.Shima at Kawasaki Heavy Industries, U.Anzer and G.Boerner at Max-Planck Institute and H.Boffin at Cardiff University. We assume that the flow is restricted within a region of constant thickness and also gas to be isothermal. We found that the flow was very unstable and that the accretion column waved like a snake. This is contrary to the criticism posed by Swiss researchers to our earlier works.
The flow is nearly steady at first and forms a very long accretion column behind the compact object. When we continue the calculation long enough, the column begins to wave and the amplitude grows with time. Occasionally an accretion disc is formed about the object.
We also performed number of numerical simulations of relating matters, such as three dimensional accretion disc, the interaction between the solar wind and an interstellar matter, and explosion of a supernova.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] I.Hachisu: "Mixing in ejecta of supernovae.II.Mixing width of 20 Payleigh-Taylor instabilities in the helium star models for type Ib/Ic super norae" Astron,& Astrophys,Suppl.sev.103. 341-364 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Yukawa: "Spiral shocks in 30 Accretion Discs" Monthy notices R.astr.Soc.292. 321-330 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] N.Pogorelov: "Influence of the interstellar magnetic field direction on the shape of the global heliopause." J.Geophysical Research. 103. 237-245 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] N.Pogordov: "Application of murerical mathods to modeling the stellar wind and interstellar medium inte action" Invited to CFD Reviens,John Wiley & Sons,Chichester. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] E.Shima: "Numerical computation of two dimensional wind accretion of intother gas" Astron.Astrophys.(in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Hachisu, T.Matsuda, K.Nomoto and T.Shigeyama: "Mixing in ejecta of supernovae. II.Mixing width of 2D Rayleigh-Taylor instabilities in the helium star models for type Ib/Ic supernovae" Astron.& Astrophys.Suppl.Ser.103. 341-364 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Yukawa, H.Boffin and T.Matsuda: "Spiral Shocks in 3D Accretion Discs" Mon.Not.R.astr.Soc.292. 321-330 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] N.Pogorelov, T.Matsuda: "Influence of the interstellar magnetic field direction on the shape of the global heliopause" J.Geophysical Research. 103. 237-245 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] N.Pogorelov, T.Matsuda: "Application of numerical methods to modeling the stellar wind and interstellar medium interaction." Invited to CFD Reviews, John Wiley & Sons, Chichester. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] E.Shima, T.Matsuda, U.Anzer, G.Borner, H.Boffin: "Numerical computation of two dimensional wind accretion of ithothermal gas." Astron.Astrophys.(in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] I.Hachisu: "Mixing in ejecta of supernova.II." Astron.& Astrophys.Suppl.104. 341-364 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Ishii: "Numerical Simulations of Two-Dimensional and Three-Dimensional Wind Accretion Flows of an Isothermal Gas" Astrophys.J.404. 706-716 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] T.Ishii: "Numerical Simulations of Two-dimensional and Three-Dimensional Wind Accretion Flows of an Isothermal Gas" Astrophys.J.404. 706-716 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Matsuda: "MHD Interaction between the Solar Wind and Local Interstellar Medium" Proc.of the 5th International Symposium on C.F.D.2. 186-193 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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