234 周期的温度揺らぎ下で成長する純金属デンドライトのフェーズフィールド法による解析(形態形成,OS08 多様なスケールにおける相変態および形態形成解析)

概要

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The dendritic solidification is one of the self-organization phenomena caused by two opposite driving forces, inverse-thermal gradient and the surface energy at the solidification. We used phase-field model for the simulation of pure-Ni dendritic solidification in the undercooling liquid with periodic thermal noise. At the vicinity of dendrite tip, local interfacial energy shows the periodical oscillatory distribution, independent from thermal noise, under the paraboloidal coordinates. Some periodic changes of second arms in dendrites were caused from the beats from intrinsic oscillation and thermal noise. These thermal and energy wave could be understood from wave theory of dendrite.
社団法人日本機械学会の論文
2006-11-02