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목분 충진 고분자 용융체의 압출다이 내 유동 및 열전달에 관한 수치해석
고승환(Seung Hwan Ko),박형규(Hyung Gyu Park),송명호(Myungho Song),김찬중(Cham-Jung Kim) 대한기계학회 2001 대한기계학회 춘추학술대회 Vol.2001 No.9
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.