Study on Flow with Phase Transtition in Sequential Production Technique of High Quality Solid Spherical Shells

高质量实心球壳连续生产工艺中相变流动研究

• 批准号: 06452171
• 负责人: HASHIMOTO Hiroyuki
• 金额: $ 4.1万
• 依托单位: Institute of Fluid Science, 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: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452171/
• 关键词: Multiphase Flow; Phase Transition; Compound Fluids; Solid Spherical Shells; Solidification; Natural Convection; Dynamics of Interface; Computational Fluid Dynamics; 機能性流体; 中空液滴

The sequential production of mm-sized and high-quality solid spherical shells, which can be applied to various fields of technology, is the subject to the present research. Using the sequential production device of liquid spherical shells and solid spherical shells in liquid-liquid-gas systems, the experimental and theoretical research on the economical production of solid spherical shells is made systematically to improve the production device and to provide the basic design data. Furthermore, the metallic spherical shells are successfully produced by the present production device. The diameter and production frequency for wide flow conditions are measured. The main futures of the present research are as follows : (1) The new production device of solid spherical shells using liquid-liquid-gas systems is designed, and it is recognized that the production frequency of solid shells becomes larger than that using previous device. (2) The effects of physical properties of liquids in the pr … More oduction device on the natural convection in immiscible two liquids layr are analyzed numerically. Consequently, when the Grashof number of lower liquid is large and when the Grashof number and Prandtl number of upper liquid are smaller, the temperature difference between the upper liquid and the liquid-liquid interface becomes large, which is the suitable condition for sequential production of solid shells. (3) The effects of setting the plate for prevention of natural convection on the temperature distribution in the production device are analyzed numerically. It is possible to precisely control the natural convection by setting the plate. (4) By the numerical analysis of natural convection heat transfer in two-layr liquids in vertical cylindrical container, the suitable condition of aspect ratio of container for solid shells production is proposed. (5) The metallic shells are successfully produced by the present device, which is very difficult using the previous device. (6) The flow mechanism of production of metallic shells at the liquid-liquid interface is observed in detail. (7) The diameter, production frequency, shell thickness and deformation ratio are measured for various flow conditions. The empirical equation for prediction of shell's diameter is proposed. Less

本课题的研究内容是连续生产毫米级、高质量的实心球壳，使其能够应用于各个技术领域。利用液-液-气系统中液体球壳和固体球壳的顺序生产装置，对固体球壳的经济生产进行了系统的实验和理论研究，以改进生产装置，提供基础设计数据。此外，本生产装置成功地生产了金属球壳。测量了宽流量条件下的直径和生产频率。（1）设计了液-液-气三相固体球壳生产装置，并发现该装置的生产频率比以往的装置要高。(2)研究了压力机中液体的物理性质对压力的影响 ...更多信息 数值分析了诱导装置对不互溶双液层自然对流的影响。因此，当下层液体的Grashof数较大，而上层液体的Grashof数和Prandtl数较小时，上层液体与液-液界面的温差较大，这是连续制备固体壳的适宜条件。(3)数值分析了设置自然对流阻挡板对生产装置内温度分布的影响。通过设置板可以精确地控制自然对流。(4)通过对竖直圆柱形容器内双层液体自然对流换热的数值分析，提出了固体壳体生产中容器高宽比的适宜条件。(5)金属壳体通过本装置成功地生产，这是使用先前装置非常困难的。(6)详细观察了液-液界面金属壳层生成的流动机理。(7)测量了不同流动条件下的直径、生产频率、壳体厚度和变形率。提出了预测壳体直径的经验公式。少

项目成果

Satoyuki KAWANO,Hiroyuki HASHIMOTO,Akio IHARA: "A Molecular Dynamics Study on Break-Down Phenomena of a Liquid Thread (Numerical Simulations of Lennard-Jones Molecules)" Proc. 3rd JSME-KSME Fluids Eng. Conf., Sendai, Japan. 317-322 (1994)

Satoyuki KAWANO、Hiroyuki HASHIMOTO、Akio IHARA：“液体线击穿现象的分子动力学研究（Lennard-Jones 分子的数值模拟）”Proc。

S.Kawano,H.Hashimoto,A.Ihara,et all: "Sequential Production of mm-Sized Spherical Shells in Liquid-Liquid-Gas Sysetem" Liquid-Solid Flows-1994,ASME. Vol.189. 225-230 (1994)

S.Kawano，H.Hashimoto，A.Ihara，等人：“液-液-气系统中毫米尺寸球壳的连续生产”液-固流-1994，ASME。

H. Hashimoto, S. Kawano A. Shirai et als.: "Computer Aided Flow Visualization and Animation of 3-Dimensional Solid-Liquid Two-Phas Jet" Advances in Multiphase Flow 1995. 383-393 (1995)

H. Hashimoto、S. Kawano A. Shirai 等人：“三维固液两相射流的计算机辅助流动可视化和动画”多相流进展 1995。383-393 (1995)

Satoyuki KAWANO,Hiroyuki HASHIMOTO,Akio IHARA,Keiji SHIN: "Sequential Production of mm-Sized Spherical Shells in Liquid-Liquid-Gas Systems" Liquid-Solid Flows-1994-, ASME FED. Vol.189. 225-230 (1994)

Satoyuki KAWANO、Hiroyuki HASHIMOTO、Akio IHARA、Keiji SHIN：“液-液-气系统中毫米尺寸球壳的连续生产”液-固流-1994-，ASME FED。

Satoyuki KAWANO,Hiroyuki HASHIMOTO,Akio IHARA: "Molecular Dynamics of Liquid Thread Instability and Formation of Liquid Ultra-fine Particles" Proc. 4th ASME/JSME Thermal Eng. Conf. Vol. 1, Maui, U.S.A. 453-460 (1995)

Satoyuki KAWANO、Hiroyuki HASHIMOTO、Akio IHARA：“液体线不稳定性的分子动力学和液体超细颗粒的形成”Proc。