NUMERICAL SIMULATION OF SUCCINONITRITE DENDRITIC GROWTH IN A FORCED FLOW  

作　　者：Z. Chen C.L. Chen L.M. Hao 

机构地区：[1]School of Science, Department of Applied Physics, Shaanxi Key Laboratory of Condensed Matter Structures and Properties, Northwestern Polytechnical University, Xi＇an 710072, China [2]School of Science, Xi＇an University of Science ＆ Technology, Xi＇an 710054, China

出　　处：《Acta Metallurgica Sinica(English Letters)》2008年第6期444-450,共7页金属学报（英文版）

基　　金：supported by the Major Program of the National Natural Science Foundation of China (Nos.50331040 and 60171034).

摘　　要：Numerical simulation based on phase field method is performed to describe solidification process of pure material in a free or forced flow. The evolution of the interface is showed, and the effects of mesh grid and flow velocity on succinonitrite shape are studied. These results indicate that crystal grows into an equiaxial dendrite in a free flow and into an asymmetrical dendritic in a forced flow. With increasing flow velocity, the upstream dendritic arm tip grows faster and the downstream arm grows slower. However, the evolution of the perpendicular tip has no significant change. In addition, mesh grid has no influence on dendritic growth shape when mesh grid is above 300×300.Numerical simulation based on phase field method is performed to describe solidification process of pure material in a free or forced flow. The evolution of the interface is showed, and the effects of mesh grid and flow velocity on succinonitrite shape are studied. These results indicate that crystal grows into an equiaxial dendrite in a free flow and into an asymmetrical dendritic in a forced flow. With increasing flow velocity, the upstream dendritic arm tip grows faster and the downstream arm grows slower. However, the evolution of the perpendicular tip has no significant change. In addition, mesh grid has no influence on dendritic growth shape when mesh grid is above 300×300.

关 键 词：Phase field method Forced flow DENDRITIC Succinonitrite Tip velocity 

分 类 号：TG14[一般工业技术—材料科学与工程]