第10回 : 諸分野のための数学研究会

場　　所：: 東京大学大学院　数理科学研究科056号室
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駒場アクセスマップ
http://www.u-tokyo.ac.jp/campusmap/map02_02_j.html
駒場キャンパス数理科学研究科棟
http://www.u-tokyo.ac.jp/campusmap/cam02_01_27_j.html

プログラム：

横山悦郎（学習院大学）: Formation of rims surrounding a chondrule during solidification in 3- dimensions using the phase field model

ABSTRACT:: Chondrules are small particles of silicate material of the order of a few millimeters in radius, and are the main component of chondritic meteorite.

In this paper, we present a model of the growth starting from a seed crystal at the location of an outer part of pure melt droplet into spherical single crystal corresponding to a chondrule. The formation of rims surrounding a chondrule during solidification is simulated by using the phase field model in three dimensions. Our results display a well developed rim structure when we choose the initial temperature of a melt droplet more than the melting point under the condition of larger supercooling. Furthermore, we show that the size of a droplet plays an important role in the formation of rims during solidification.

第10回諸分野のための数学研究会 (北大数学COE協賛)