FENE dumbbellモデルを用いた希薄高分子溶液のせん断流動特性のブラウン運動学シミュレーション : FENEパラメータおよび緩和時間の分布の影響 Brownian Dynamics Simulation of FENE Dumbbell Model for Dilute Polymer Solutions in Shear Flow : Effects of Distributions of FENE Parameter and Relaxation Time

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著者

    • 寺岡 寛二 TERAOKA Kanji
    • 大阪大学大学院工学研究科機械物理工学専攻 Department of Mechanophysics Engineering, Graduate School of Engineering, Osaka University
    • 中村 喜代次 NAKAMURA Kiyoji
    • 大阪大学大学院工学研究科機械物理工学専攻 Department of Mechanophysics Engineering, Graduate School of Engineering, Osaka University

抄録

Brownian dynamics (BD) simulations of the steady and transient rheological behaviors of FENE dumbbell model for dilute polymer solutions in shear flow are reported. The simulations include examination of the effects of distributions of maximum allowable extension (FENE parameter b) and of relaxation time parameter α. Shear-thinning behavior of shear viscosity and the first normal stress coefficient, overshoot phenomenon in a start-up shear flow and stress relaxation for cessation of shear flow are also confirmed for distribution of b or α, which can be often observed in polymer solutions. Shear-thinning and overshoot behaviors are due to the non-linearity of FENE spring. Furthermore, it is found that the distribution of b has little influence on shear flow properties while the distribution of α can affect both the steady and transient shear flow properties under the distribution condition used in the simulations. In conclusion, BD simulation is a good tool to easily predict the effect of the distribution of maximum extension and relaxation time of dumbbells on the rheological behavior, however it can not calculate precisely the rheological properties in low shear rate region of λ<sub>0</sub>γ<0.1. This situation remains as a future task.

収録刊行物

  • 日本レオロジー学会誌

    日本レオロジー学会誌 27(1), 31-42, 1999-03

    The Society of Rheology, Japan

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各種コード

  • NII論文ID(NAID)
    10002771765
  • NII書誌ID(NCID)
    AN00198812
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03871533
  • NDL 記事登録ID
    4681046
  • NDL 雑誌分類
    ZM35(科学技術--物理学)
  • NDL 請求記号
    Z14-725
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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