Phase-Field Navier-Stokes モデルによる繊維間隙スケール樹脂流れにおける気液界面ダイナミクスの検討  [in Japanese] Simulation Study on Dynamics of Resin-Air Interface during Resin-Air Flows between Filaments Using Phase-Field Navier-Stokes Model  [in Japanese]

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Author(s)

Abstract

To investigate void formation during resin transfer molding (RTM) processes, we developed a numerical code of a multiphase fluid model that employs Navier-Stokes equation including the interfacial tension term and Cahn-Hilliard equation for capturing the resin-air interface. We performed preliminary numerical simulations of microscale resin-air flow around a regular-lattice array of four single filaments. From the analysis, we found that (1) Laplace pressure arisen from the finite curvature of the resin-air interface could drive a capillary-driven flow penetrating into the gap between the two filaments located in longitudinal direction; (2) there was another dual time scale even at the microscale on the determination of flow patters: one was caused by the main flow, and the other by capillary driven transverse flow; (3) voids could be formed when the time scale of the main flow was shorter than that of capillary flow; (4) two modes of void formations were revealed numerically: longitudinal gaps fully capped by the resin-air interface leading to the void formation under a high interfacial tension coefficient; and a small bubble left at the back-step of the filament under a relatively weak interfacial tension coefficient.

Journal

  • Journal of the Japan Society for Composite Materials

    Journal of the Japan Society for Composite Materials 36(3), 94-103, 2010-05-15

    The Japan Society for Composite Materials

References:  27

Codes

  • NII Article ID (NAID)
    10029880414
  • NII NACSIS-CAT ID (NCID)
    AN00196748
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    03852563
  • NDL Article ID
    10727026
  • NDL Source Classification
    ZM16(科学技術--科学技術一般--工業材料・材料試験)
  • NDL Call No.
    Z14-655
  • Data Source
    CJP  NDL  IR  J-STAGE 
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