Sequential Production of Solid Spherical Shells by Thermo-fluid Flow Controll

通过热流体流动控制连续生产实心球壳

• 批准号: 04452138
• 负责人: HASHIMOTO Hiroyuki
• 金额: $ 4.1万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04452138/
• 关键词: Encapsulated Liquid Drops; Solid Spherical Shells; Dynamics of Interface; Compound Fluids; Functional Fluids; Multiphase Flows; Computational Fluid Dynamics; Heat Transfer

The mass production of mm-sized solid spherical shells is studied using the sequential production device of liquid shells in liquid-liquid-gas systems. The production device comprises of the cylindrical vessel containing the two immiscible liquids and the gas injection nozzle at the center of the bottom. By controlling the gas flow rate through the nozzle and by selecting the liquids with suitable properties, the liquid shells are sequentially produced at the horizontal interface between the two immiscible liquids. The solid spherical shells are produced by solidifying the liquid shells, which move upward because of the buoyancy force, by the temperature control of the surrounding liquid. The basic flow patterns of the liquid shell, the natural convection of the surrounding liquid, the heat-mass transfer characteristics, the deformation behavior and the interface oscillation are studied in detail. These studies are made numerically using a super computer. Particularly, it is the first time to investiate the flow patterns around the liquid shells moving at relatively large velocity. Furthermore, the validity of the numerical analysis is confirmed by comparison with the experimental data. Consequently, the suitable thermalflow conditions of production device are clarified. The production frequency increases by the suitable thermal-flow conditions of production device are clarified. The production frequency increases by the obtained practical data. The maximum production frequency is about 20 although the previous value is less than 10.The results obtained here are published in the famous journals in fluid science, and receive the considerable attentions.

利用液-液-气系统中的液体球壳连续生产装置，对毫米级固体球壳的批量生产进行了研究。该生产装置包括容纳两种不混溶液体的圆柱形容器和位于底部中心的气体注入喷嘴。通过控制通过喷嘴的气体流速并通过选择具有合适性质的液体，在两种不混溶液体之间的水平界面处顺序地产生液体壳。固体球壳是通过控制周围液体的温度使液体壳凝固而产生的，液体壳由于浮力而向上移动。详细研究了液壳的基本流型、周围液体的自然对流、传热传质特性、变形行为和界面振荡。这些研究是用一台超级计算机进行的。特别是首次研究了以较大速度运动的液壳周围的流态。此外，数值分析的有效性通过与实验数据的比较得到证实。从而明确了生产装置适宜的热流条件。阐明了通过生产装置适当的热流条件来提高生产频率。根据实际数据，提高了生产频率.最大产生频率约为20，而以前的值小于10。本文的结果发表在流体科学的著名期刊上，受到了相当大的关注。

项目成果

Satoyuki KAWANO,Hiroyuki HASHIMOTO,Takahiro AZIMA: "A Study on Compound Jet Instability and Formation of Encapsulated Liquid Drop in Liquid-Liquid-Gas Systems" Proc.Int.Symp.Aerosp.Fluid Sci.,Sendai,Japan. 371-378 (1993)

Satoyuki KAWANO、Hiroyuki HASHIMOTO、Takahiro AZIMA：“液-液-气系统中复合射流不稳定性和封装液滴形成的研究”Proc.Int.Symp.Aerosp.Fluid Sci.，仙台，日本。

Satoyuki KAWANO,Hiroyuki HASHIMOTO,Takahiro AZIMA: "A Study on Compound Jet Instability and Formation of Encapsulated Liquid Drop in Liquid-Liquid-Gas Systems" Proc.Int.Symp.Aerosp.Fluid Sci.,Sendai,Kapan. 371-378 (1993)

Satoyuki KAWANO、Hiroyuki HASHIMOTO、Takahiro AZIMA：“液-液-气系统中复合射流不稳定性和封装液滴形成的研究”Proc.Int.Symp.Aerosp.Fluid Sci.，仙台，Kapan。

川野 聡恭,橋本 弘之: "気ー液ー液系熱流動制御による固体球殻の連続生成" 計測自動制御学会,第7回流体制御シンポジウム. 13-18 (1992)

Satoshi Kawano、Hiroyuki Hashimoto：“通过气-液-液系统的热力学控制连续生成固体球壳”仪器与控制工程师学会，第七届流体控制研讨会13-18 (1992)。

川野聡恭,橋本弘之: "偏心した球状中空液滴の定常運動" 日本機械学会論文集(B編). 59. 1465-1471 (1993)

Satoshi Kawano、Hiroyuki Hashimoto：“偏心球形空心液滴的稳定运动”日本机械工程师学会会刊（编辑 B）59. 1465-1471 (1993)。

Satoyuki KAWANO, Hiroyuki HASHIMOTO: "Flow Patterns around a Spherically Eccentric Encapsulated Liquid Drop at Low and Intermediate Reynolds Numbers" Proc. 5th Int. Symp. Comput. Fluid. Dyn., Sendai, Japan. Vol.2. pp.33-38 (1993)

Satoyuki KAWANO、Hiroyuki HASHIMOTO：“低和中雷诺数下球形偏心封装液滴周围的流动模式”Proc。