Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Numerical Analysis on the Flow and Heat Transfer Characteristic of Wood-flour-filled Polypropylene Melt in an Extrusion Die

목분 충진 고분자 용융체의 압출다이 내 유동 및 열전달에 관한 수치해석

  • 고승환 (서울대학교 대학원 기계항공공학부) ;
  • 박형규 (서울대학교 정밀기계설계공동연구소) ;
  • 송명호 (동국대학교 기계공학과) ;
  • 김찬중 (서울대학교 기계항공공학부)
  • Published : 2003.02.01
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Abstract

A three-dimensional numerical analysis of the flow and heat transfer characteristic of wood-flour-filled polypropylene melt in an extrusion die was carried out. Used for this analysis were Finite Concept Method based on FVM, unstructured grid and non-Newtonian fluid viscosity model. Temperature and flow fields are closely coupled through temperature dependent viscosity and viscous dissipation. With large Peclet, Nahme, Brinkman numbers, viscous heating caused high temperature belt near die housing. Changing taper plate thickness and examining some predefined parameters at die exit investigated the effect of taper plate on velocity and temperature uniformities. In the presence of taper plate, uniformity at die exit could be improved and there existed an optimum thickness to maximize it.

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References

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