Formation and Transportation of Disperesed Phases in Microchannels and Development of Microseparators for Heterogeneous Systems.

微通道中分散相的形成和传输以及异质系统微分离器的开发。

基本信息

批准号：
15360415
负责人：
MOROOKA Shigeharu
金额：
$ 6.85万
依托单位：
Fukuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15360415/
关键词：
Microchannel Multiphase Flow Mass Transfer Chemical Reaction Simulation

项目摘要

Separation processes possess major parts in all chemical plants, and, therefore, effective miniaturization of separation units actually decides the success of micro-chemical plants. Multi-phase flows are especially important because they are utilized in principal separation units, such as distillation, gas absorption, extraction and particle separation. In the present study, microchannels with a variety of configurations are fabricated, and multi-phase flows for gas-liquid and liquid-liquid systems are investigated by experiments and computational fluid dynamics.The effects of vibration on gas-liquid microchannel flow were investigated in detail. The vibration along the flow direction accelerated coalescence of fine bubbles, while the vibration perpendicular to the flow direction caused self-exited vibration. These findings are important to control the behavior of fine bubbles in microchannels.Measuring techniques of gas-liquid flow in microchannels were developed, and pressure drop an … More d relative velocity of fine bubbles were fully determined.Flow patterns in horizontal microchannels for liquid-liquid systems were determined as functions of physical properties of liquid, inlet shapes, and liquid flow rates. The criteria for homogeneous droplet flow, heterogeneous droplet flow and layered two phase flow were respectively evaluated.Two-phase flows in microchannels were simulated by using computational fluid dynamics software (FLUENT). The results were in good agreement with the experimental data. The affinity between the wall surface and the flowing fluid was found to play a key role for the formation of homogeneous fine droplets.The liquid-liquid flow systems were also studied with respect to extraction, and the conditions for stable liquid-liquid separation at the exit were obtained. The extraction of Cu ions was then carried out, and it was found that the design of the microchannel strongly influenced the extraction efficiency. The backmix properties of microchannel flow were also investigated.The above results evidently contribute the creation of noble separation units for multi-phase systems in the scale of microchannels. Less

分离过程在所有化工厂中占有重要地位，因此，分离单元的有效小型化实际上决定了微型化工厂的成功。多相流尤其重要，因为它们用于主要分离单元，例如蒸馏、气体分离。在本研究中，制造了多种结构的微通道，并通过实验和计算流体动力学研究了气-液和液-液系统的多相流。振动对气体的影响。 -液体详细研究了沿流动方向的振动加速了细小气泡的聚结，而垂直于流动方向的振动则引起自激振动，这些发现对于控制微细气泡在微通道中的行为具有重要意义。开发了微通道中的气液流动，并完全确定了细小气泡的压降和相对速度。液-液系统水平微通道中的流动模式被确定为液体物理性质的函数，分别评价了均匀液滴流、非均匀液滴流和分层两相流的判据。利用计算流体力学软件(FLUENT)对微通道内的两相流进行了模拟，结果良好。与实验数据一致。发现壁表面和流动流体之间的亲和力对于均匀细小液滴的形成起着关键作用。还研究了液-液流动系统的萃取和稳定条件。然后对铜离子进行了强烈的萃取，发现微通道的设计对萃取效率也有影响。上述结果很明显。为微通道规模的多相系统创建高贵的分离单元做出贡献。

项目成果

期刊论文数量（32）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Three Dimensional Simulation and Visualization of Laminar Flow in a Microchannel with Hair-Pin Curves

发夹曲线微通道层流的三维模拟与可视化

DOI：
发表时间：
2004
期刊：
AIChE Journal 50・7
影响因子：
0
作者：
Y.Yamaguchi;F.Takagi;K.Yamashita;H.Nakamura;H.Maeda;K.-I.Sotowa;K.Kusakabe;Y.Yamasaki;S.Morooka
通讯作者：
S.Morooka

Phase Separation of Air Water Two-Phase Mixture Flowing in a Micro Channel

微通道内流动的气水两相混合物的相分离

DOI：
发表时间：
2005
期刊：
6^<th> KSME-JSME Thermal and Fluids Eng.Conf.
影响因子：
0
作者：
Y.Yamasaki;A.Kariyasaki;A.Ousaka;S.Morooka
通讯作者：
S.Morooka

Simulation of Laminar Flow Behavior in a Microchannel and Its Three-dimensional Visualization

微通道层流行为模拟及其三维可视化

DOI：
发表时间：
2004
期刊：
Kagaku Kogaku Ronbunshu 30・3
影响因子：
0
作者：
Y.Yamaguchi;F.Takagi;K.Yamashita;H.Shimizu;H.Maeda;K.-I.Sotowa;K.Kusakabe;Y.Yamasaki;S.Morooka
通讯作者：
S.Morooka

山口佳子, 高木史典, 山下健一, 清水肇, 前田英明, 外輪健一郎, 草壁克己, 山崎吉一, 諸岡成治: "屈曲構造を持つマイクロ流路における流体挙動とそのシミュレーション"化学工学論文集. (印刷中).

Yoshiko Yamaguchi、Fuminori Takagi、Kenichi Yamashita、Hajime Shimizu、Hideaki Maeda、Kenichiro Somawa、Katsumi Kusakabe、Yoshikazu Yamazaki、Seiji Morooka：“具有弯曲结构的微通道中的流体行为及其模拟”（正在印刷中）。