• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Nonlinear Evolution of two Gravitational Instabilities and Thermal Conduction Loss at Fractal Interface

Research Project

Project/Area Number 11680486
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionOsaka University

Principal Investigator

NISHIHARA Katsunobu  Institute of Laser Engineering, Osaka University, Professor, レーザー核融合研究センター, 教授 (40107131)

Co-Investigator(Kenkyū-buntansha) SAKAGAMI Hitoshi  Institute of Himeji Technology, Osaka University, Associate Professor, 工学部, 助教授 (30254452)
NAGATOMO Hideo  Institute of Laser Engineering, Osaka University, Research Assistant, レーザー核融合研究センター, 助手 (10283813)
MURAKAMI Masakatsu  Institute of Laser Engineering, Osaka University, Research Assistant, レーザー核融合研究センター, 助手 (80192772)
MUTSUOKA Chihiro  Ehime University, Faculty of Science, Research Assistant, 理学部, 助手 (10270266)
ISHIZAKI Ryuichi  National institute of Fusion Science, Osaka University, Research Assistant, ヘリカル研究部, 助手 (60301727)
長谷川 進  航空技術研究所, 数値宇宙, 研究官
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsRayleigh-Taylor instabi / Richtmyer-Meshkov instability / vortex sheet / ablation / nonlinear wave / molecular dynamic simulation / fractal / Lie group theory / 弱い非線形成長 / ダブルスパイラル / レーザー核融合 / 爆縮 / 流体不安定性
Research Abstract

1. We have developed a weakly nonlinear theory of ablative Rayleigh-Taylor (RT) instability with a finite bandwidth Included self-consistently. The theory includes up to third order nonlinearity that results in saturation of linear growth and determines weakly nonlinear growth. It is found that the ablation effects reduce both the saturation amplitude of the linear growth and the weakly nonlinear growth. They are evaluated for plastic and DT targets. The weakly nonlinear growth is shown given by the product pf the linear growth and the saturation amplitude.
2. A third order nonlinear theory of Richtmyer-Meshkov (RM) instability has been developed by treating unstable interface as a vortex sheet with density jump. Nonlinear growth rates of spike and bubble are shown to agree well with hydrodynamic simulations. Circulation varies locally with time due to the density jump at the sheet and it introduces stretching and shrinking of the interface locally.
3. We have developed a molecular dynamic simulation program to treat RM instability in a cylindrical geometry, that conventional hydrodynamic codes fails to simulate. With the use of the code, we have investigated the stability of converging shocks and the nonlinear growth of RM instability, We have shown the increase of the nonlinear growth due to multiple shocks rebounded at the center and its dependence on mode number.
4. We have developed self-similar solutions of laser implosion in which thermal conduction plays an important rote by using Lie group theory. This model has been applied for hydrodynamically equivalent implosions in order to design future experimental facility for ignition and high gain in inertial fusion energy research.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] N.Ozaki: "Planer shock wave generated by uniform irradiation from two overlapped partially coherent laser beams"J. Appl. Phys.. 89・5. 2571-2575 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S.Sakabe: "The Interactions of ultra-short high-intensity laser pulse with large molecules and clusters : Experimental and computational studies"Phys. Plasmas. 8・5. 2517-2524 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Nishihara: "High energy ions generated by laser driven Coulomb explosion of cluster"Nucl. Instruments and Methods in Phys. Research A. 464. 98-102 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.-G.Kang: "Blast-wave-sphere interaction using a laser-produced plasma : An experiment motivated by supernova 1987A"Phys. Rev. E. 64. 47402-47405 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.-G.Kang: "Laboratory Simulation of the Collision of Supernova 1987A with Its Circumstellar Ring Nebula"Plasma Phys. Reports. 27・10. 843-851 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Z.-M.Sheng: "Anisotropic filamentation instability of intense laser beams in plasma near the critical density"Phys. Rev. E. 64. 664091-664099 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N. Ozaki, Y. Sasatani, K. Kishida, M. Miyanaga, K. Nagai, K. Nishihara et al.l.: "Planer shock wave generated by uniform irradiation from two overlapped partially coherent laser beams"J. Appl. Phys.. Vol. 89, No. 5. 2571-2575 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. Sakabe, K. Nishihara, N. Nakashima, J. Kou, S. Shimizu, V. Zhakhovskii, H. Amitani, F. Sato: "The interactions of ultra-snort high-intensity laser pulse with large molecules and clusters: Experimental and computational studies"Phys. Plasmas.. Vol. 8, No.5. 2517-2524 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K. Nishihara, H.Amitani, M. Murakami, S. V. Bulanov, T. Zh. Esirkepov: "High energy ions generated by laser driven Coulomb explosion of cluster"Nucl. Instruments and Methods in Phys. Research A. 464. 98-102 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.-G. Kang, K. Nishihara, H. Nishimura, H. Takabe, A. Suriahara, T. Norimatsu, K. Nagai, H. Kim, M. Nakatsuka, H. J. Kong, and N. J. Zabusky: "Blast-wave-sphere interaction using a laser-produced plasma: An experiment motivated by supernova 1987A"Phys. Rev. E.. Vol. 64. 47402-47405 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.-G. Kang, H. Nishimura, H, Takabe, K, Nishihara, A, Sunahara, T. Norimatsu, K, Nagai, H. Kim, M. Makatsuka, and H. J. Kong: "Laboratory Simulation of the Collision of Supernova 1 987A with Its Circumstellar Ring Nebula"Plasma Phys. Reports. Vol. 27, No. 10. 843-851 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Z.-M. Sheng, K. Nishihara, I Honda, Y. Sentoku and K. Mima: "Anisotropic filamentation instability of intense laser beams in plasma near the critical density"Phys. Rev. E.. Vol. 64. 066409-1-066409-9 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] S. V. Bulanov, F. Califano, T. Zh. Esirkepov, K. Mima, N. M. Naumova, K. Nishihara, F. Pegoraro, Y. Sentoku and V. A. Vshivkov: "Generation of subcycle relativistic solitons by super intense laser pulses in plasmas"Physica D: Nonlinear phenomena.. Vol. 152-153. 682-693 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N. M. Naumova, S. V. Bulanov, T. Zh. Esirkepov, D. Farina, K. Nishihara, F. Pegoraro, H. Ruhl, and A. S. Sakharov: "Formation of Electromagnetic Postsolitons in Plasmas"Physical Review Letters. Vol. 87, Issue 18. 5004-5004 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] N.Ozaki: "Planer shock wave generated by uniform irradiation from two overlapped partially coherent laser beams"J.Appl.Phys.. 89・5. 2571-2575 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Sakabe: "The Interactions of ultra-short high-intensity laser pulse with large molecules and clusters : Experimental and computational studies"Phys.Plasmas. 8・5. 2517-2524 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Nishihara: "High energy ions generated by laser driven Coulomb explosion of cluster"Nucl.Instruments and Methods in Phys.Research A. 464. 98-102 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.-G.Kang: "Blast-wave-sphere interaction using a laser-produced plasma : An experiment motivated by supernova 1987A"Phys.Rev.E. 64. 47402-47405 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.-G.Kang: "Laboratory Simulation of the Collision of Supernova 1987A with Its Circumstellar Ring Nebula"Plasma Phys.Reports. 27・10. 843-851 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Z.-M.Sheng: "Anisotropic filamentation instability of intense laser beams in plasma near the critical density"Phys.Rev.E. 64. 664091-664099 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Murakami and K.Nishihara: "Convective Instability of Radiatively Cooling Self-similar Implosions"Physics of Plasmas. Vol.7,No.7. 2978-2986 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Takabe,H.Nagatomo,K.Nishihara, et al.: "Integrated Code Development and Analysis of Implosion and Hydrodynamic Experiments"Fusion Energy 1998 (17th Conference Proceedings Yokohama, Japan, Oct.18-24,1998) Published by IAEA (2000). Vol.3. 1115-1118 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] V.V.Shakhovskii,K.Nishihara,and N.A.Inogamov: "Molecular Dynamics Simulation of Rarefaction Waves in Media That Can Undergo Phase Transition pp.232-235"JETP Lett.. Vol.71. 241-248 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Fukuda,K.Nishihara,C.Matsuoka,and J.G.Wouchuk: "Nonlinear Evolution of Single Spike in Richtmyer-Meshkov Instability"Inertial Fusion Science and Applications 99,(Elsevier, Paris (2000), Editors : C.Labaune,W.J.Hogan,and K.A.Tanaka). 232-235 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] V.V.Zhakohskii,S.V.Zybin,K.Nishihara, et al.: "Orientation Dependence of Shock Structure with Melting in L-J Crystal from Molecular Dynamics"Progress of Theoretical Physics Supplement. No.138. 223-228 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Fukuda,K.Nishihara,C.Matsuoka,and J.G.Wouchuk: "Saturation Amplitude of Linear Growth in Rayleigh-Taylor Instability with a Finite Spectrum Width"Inertial Fusion Science and Applications 99,(Elsevier, Paris (2000), Editors : C.Labaune,W.J.Hogan,and K.A.Tanaka). 228-231 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Fukuda,K.Nishihara,M.Okamoto,C.Matsuoka,R.Ishizaki,H.Sakagami and H.Nagatomo: "Nonlinear Evolution of Single Spike Structure and Voltex in Richimyer-Meshkov Instability"Journal of Plasma and Fusion Research. Vol.75No.10-CD. 201-210 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Fukuda,K.Nishihara,M.Okamoto and S.Hasegawa: "Appearance of Fractal Structure in Rayleigh-Taylor Instability"Journal of Plasma and Fusion Research. Vol.75No.10-CD. 211-218 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Nishihara: "Weakly Nonlinear Theory of Rayleigh-Taylor Instability"J. Plasma Fusion Res. SERIES. Vol.2. 536-540 (1999)

    • Related Report
      1999 Annual Research Report

URL: 

Published: 1999-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi