Phase Field Simulation of Succinonitrile Dendrite Growth

Chen Zhi1; Chen Changle1; Hao Limei2

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Phase Field Simulation of Succinonitrile Dendrite Growth
Issue 7, Pages: 514-517(2007)
Published： 2007 ，
DOI：

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[1]陈志,陈长乐,郝丽梅.相场法模拟丁二腈枝晶生长研究[J].特种铸造及有色合金,2007(07):514-517+488.

Chen Zhi1, Chen Changle1, Hao Limei2. Phase Field Simulation of Succinonitrile Dendrite Growth. [J]. Special Casting & Nonferrous Alloys (7):514-517(2007)
[1]陈志,陈长乐,郝丽梅.相场法模拟丁二腈枝晶生长研究[J].特种铸造及有色合金,2007(07):514-517+488. DOI：

Chen Zhi1, Chen Changle1, Hao Limei2. Phase Field Simulation of Succinonitrile Dendrite Growth. [J]. Special Casting & Nonferrous Alloys (7):514-517(2007) DOI：

摘要

基于相场方法对纯物质的凝固

进行了二维数值模拟。以丁二腈（SCN）为例

展示了界面形貌的演化过程

研究了相场参数对枝晶界面形貌的影响。结果表明

随着各向异性值的增加

晶核由一圆核逐渐发展为发达的枝晶

当γ=1/15时与γ=0一样

晶核生长为一圆核;随着过冷度的增大

二次枝晶出现并长大

枝晶的稳态尖端速度呈递增趋势

且增加趋势明显加快;随着耦合系数的增大

枝晶稳态尖端速度呈递增趋势

且耦合系数越大

界面的稳定性越差。

Abstract

A numerical calculation based on phase field method was developed to describe two-dimensional solidification and evolution of the interface morphology as well as the effects of phase field parameters on pure matter using succinonitrile.The results show that with increasing anisotropy values

the cell can be evolved into developed dendrites gradually

while the nuclei can be grown into the cell with γ of 1/15.With increasing undercooling rate

the second dendrite occurs in the structure and grows

where the tip velocity at steady state becomes faster and faster;with the increase of coupling coefficient

the tip velocity at steady state can be improved

however

the interfacial stability can be decreased.