粉末注射成形多相流動過程數值模擬模型

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基金項目:

高等學校博士學科點專項科研基金資助項目(No.99053310)

國家重點基礎研究發展規劃項目(No.G2000067203)

國家杰出青年科學基金資助項目(No.50025412)

Numerical simulation models of powder injection molding multiphase filling flow process

1. Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. National Key Lab for Powder Metallurgy, Central South University, Changsha 410083, China

摘要: 把計算流體動力學的多相流概念及兩相流模型引入到粉末注射成形領域,介紹了描述粉末-粘結劑充模流動過程的單流體模型、雙流體模型及歐拉-拉格朗日模型,并簡要分析了各種模型的特點.分析表明,雙流體模型相對于單流體模型更有利于監視兩相分離、粉末聚集等出現在粉末注射成形過程中的特殊現象,并且比歐拉-拉格朗日模型更容易收斂.
- 粉末注射成形 /
- 計算機模擬 /
- 多相流 /
- 兩相流模型
Abstract: The conception of multiphase flow and the two-phase flow models were introduced into the field of powder injection molding (PIM). The single-fluid model, two-fluid model and Eulerian-Lagrangain model for describing the powder-binder filling flow process were discussed. The characteristics of each model were briefly analyzed. Simulation results showed that the two-fluid model was fitter than the single-fluid model for describing the powder segregation, powder concentration and other special phenomena arising in PIM. Furthermore, the two-fluid model is easier to reach convergent than the Eulerian-Lagrangain model in simulating the PIM process.
- powder injection molding /
- computational simulation /
- multiphase flow /
- two-phase flow model