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| 1 | 等轴球晶凝固多相体系内热溶质对流、补缩流及晶粒运动的数值模拟 Ⅰ.三相流模型显示文摘基于Eulerian-Eulerian方法和体积元平均技术,建立了模拟等轴球晶凝固过程的液、固、气三相流模型.液、固两相处理成相互分离、相互扩散的介质,气相与液、固两相只存在热量及动量的相互作用,三相(凝固前)作为自由流体共享一个统一的压力场.分别求解三相的质量、动量、溶质、热焓守恒方程;相间的热量交换和摩擦拖拽以及液/固界面上的溶质再分配和凝固潜热释放,通过定义对应守恒方程的源项和交换项而加以考虑;另外,单独求解一个晶粒密度守恒方程.晶粒的形核生长(相变) 也加以模型化并体现在对应的源项中,模型中所用的密度定义为溶质与温度的函数,因此可综合考虑热溶质对流、晶粒运动及凝固收缩所引起的补缩流动.凝固过程的体积收缩及补缩流动将体现在气/液自由表面的波动上. | 王同敏 姚山 张兴国 金俊泽 M Wu A Ludwig B Pustal A Bührig-Polaczek | 2006 | 金属学报2006，42，6： | 18 |
| 2 | Simulation of cooling channel rheocasting process of A356 aluminum alloy using three-phase volume averaging model显示文摘The cooling channel process is a rehocasting method by which the prematerial with globular microstructure can be produced to fit the thixocasting process. A three-phase model based on volume averaging approach is proposed to simulate the cooling channel process of A356 Aluminum alloy. The three phases are liquid, solid and air respectively and treated as separated and interacting continua, sharing a single pressure field. The mass, momentum, enthalpy transport equations for each phase are solved. The developed model can predict the evolution of liquid, solid and air fraction as well as the distribution of grain density and grain size. The effect of pouring temperature on the grain density, grain size and solid fraction is analyzed in detail. | T. Wang B. Pustal M. Abondano T. Grimmig A. Bührig-Polaczek M. Wu A. Ludwig | 2005 | 中国有色金属学会会刊:英文版2005，15，2： | 1 |
| 3 | A numerical study of solidiffication in powder injection molding process显示文摘 | SAMANTA S K CHATTOPADHYAY H PUSTAL B | 2008 | International of Heat and Mass Transer2008，51，： | 1 |
| 4 | General Concept for a Stohility Analysis of a Planar Interface under Rapid Solidification Conditions in Multicomponont Alloy Systems显示文摘 | Ludwig A Pustal B Hedach D M | 2001 | Materials Science and Engineering A2001，，： | 1 |
| 5 | A numerical study of solidification in powder injection molding process 显示文摘 | SAMANTA S K CHATTOPADHYAYH PUSTAL B | 2008 | International Journal of Heat and Mass Transfer2008，51，3： | 1 |
| 6 | A numerical study of solidification in powder injection molding process显示文摘 | SAM_ANT S K CHATTOPADHYAY H PUSTAL B BERGER R GODKHINDI M M BI3HRIG-POLACZEK A | 2008 | International Journal of Heat and Mass Transfer2008，51，34： | 1 |
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