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オートクレーブ内自然対流の3次元数値シミュレーション 3-Dimensional Numerical Simulations of Natural Convection in Autoclave オートクレーブ ナイ シゼン タイリュウ ノ 3ジゲン スウチ シミュレーション 伊東, 朋秋 イトウ, トモアキ 菊地, 正憲 キクチ, マサノリ Kikuchi, Masanori 平野, 公孝 ヒラノ, キミタカ Hirano, Kimitaka Ito, Tomoaki Natural Convection, Autoclave, Synthetic Quartz, Numerical Simulations, The Hydrothermal Growth Method Recently, there is a strong demand for the crystal device because the demand for various multimedia products increases rapidly. Therefore, the technology that manufactures synthetic quartz in large quantities quickly is needed. The micro manufacturing technology such as the photolithography technology is widely applied in an electronic industrial field. Therefore, the material that is free from linear defect and lattice defect is requested. To keep the high quality, it is necessary to prevent micro particle called Inclusion from mixing internally during the growth process of crystal. In general, the synthetic quartz is manufactured by the hydrothermal growth method in an autoclave. In this research, an autoclave size is over 600mm diameter and 14m internal depth. It is difficult to experiment in the autoclave, because it has a high temperature of over 300℃ and a high pressure about 1200 atmospheres. Therefore, it is important to clarify the flow field in the autoclave by the numerical analysis for the enlargement of the autoclave, the quality improvement of the synthetic quartz, the cost reduction and the processing technology development of the synthetic quartz. 宮崎大学工学部 Faculty of Engineering, University of Miyazaki 2010-09-30 jpn departmental bulletin paper VoR http://hdl.handle.net/10458/3220 https://miyazaki-u.repo.nii.ac.jp/records/2755 AA00732558 05404924 宮崎大学工学部紀要 Memoirs of Faculty of Engineering, University of Miyazaki 39 239 246 https://miyazaki-u.repo.nii.ac.jp/record/2755/files/engineering39-37.pdf application/pdf 1.1 MB 2020-06-21