粉末注射成型过程的双流体数学模型
Two-fluid Model during Powder Injection Molding Process
摘 要
为了研究粉末注射成型(PIM)过程特有的偏析现象,提出了等效粉末的概念并引入粉末的拟流体假设;通过引用流体动力学的研究方法建立了PIM过程双流体模型基本控制方程,并对粉末、粘结剂相间作用的表达式及粉末与粘结剂的粘度关系进行了探讨;采用CFX软件分别基于双流体及单流体数学模型对PIM过程进行了数值模拟.结果表明:两者的模拟结果吻合较好,证明了双流体数学模型的可靠性.
偏析
双流体模型
数值模拟
powder injection molding(PIM)
segregation
two-fluid model
numerical simulation
Abstract
The conception of equivalent powder was brought forward and the quasi-fluid hypothesis of powder was introduced for studing the powder segregation during powder injection molding(PIM).The governing equation of the two-fluid model was built by the hydrodynamic method,which described the process of PIM.The expression of interaction phase and the viscosity relationship between the powder and binder were studied.The simulation result based on the two-fluid model is in agreement with the result based on the single-fluid model by CFX software,verifying the credibility of the two-fluid model.
中图分类号 TF12
所属栏目
基金项目 国家自然科学基金重点资助项目(50634010);国家重点基础研究发展规划资助项目 (G2000067203);国家杰出青年科学基金资助项目(50025412)
收稿日期 2007/7/11
修改稿日期 2007/12/7
网络出版日期
作者单位点击查看
备注王玉会(1977-),女,河北保定人,博士研究生.
引用该论文: WANG Yu-hui,QU Xuan-hui,HE Xin-bo,ZHANG Yong,ZHAO Li-ming. Two-fluid Model during Powder Injection Molding Process[J]. Materials for mechancial engineering, 2008, 32(5): 74～77
王玉会,曲选辉,何新波,张勇,赵丽明. 粉末注射成型过程的双流体数学模型[J]. 机械工程材料, 2008, 32(5): 74～77
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参考文献
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【3】李静海,欧阳洁,高士秋,等.颗粒流体复杂系统的多尺度模拟[M].北京:科学出版社,2005.
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【5】郑洲顺,曲选辉.粉末-粘结剂两相流模型的碰撞分析与计算机模拟[J].计算机工程与应用,2003(4):215-216,232.
【6】Shen H H,Achermann N L.Constitutive relationships for fluid-solid mixtures[J].J Engng Mech Div ASCE,1982,108:748-763.
【7】Ishii M.Thermo-fluid dynamic theory of two-phase flow[M].Paris:Eyrolls,1975.
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