Development of Reactors and Dialysis Devices without Damaging Fragile Emulsion

不破坏易碎乳液的反应器和透析装置的开发

基本信息

批准号：
14350410
负责人：
OHMURA Naoto
金额：
$ 9.09万
依托单位：
Kobe University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2003
项目状态：
已结题

项目摘要

This research aimed to develop new reactors and dialysis devices without damaging fragile materials. A low shear and laminar flow is required for the fragile materials. Hence, chaotic mixing in a laminar flow field is suitable for development of such reactors. First, this research proposed a new design method of mixing field by means of a constructive approach and to discuss applicability of this method to a two-dimensional laminar mixing field. The presented method consisted of an estimation method based on the information entropy theory and a optimization method using a genetic algorithm. A very simple rotating flow is assigned for a basic component. This method successfully searched the very near optimal configuration of the rotating flow for obtaining a well-mixing state. Next, effect of mixing on chemical reactions in circular Taylor vortex flow reactor was experimentally investigated by using a second-order reaction system. The mixing behaviors in the inside of Taylor vortex cell … More s were also observed by a flow-visualization technique. The flow-visualization experiment clearly revealed the existence of two mixing zones within a Taylor vortex cell at low Reynolds numbers. Namely, the fluid flowing near the cell boundary was axially well-mixed, while the fluid element confined to the vortex core region did not collide with cylindrical wall. This vortex, core region can be regarded as an isolated mixing region. It was found in the reaction experiment that the reaction rate was larger in laminar and singly periodic wavy Taylor vortex flow regimes having large isolated mixing region than in quasi-periodic and weakly turbulent Taylor vortex flow regimes. Mixing behaviors in a conical Taylor vortex flow reactor were investigated using flow visualization and salt-solution techniques. Three different flow modes were observed, i.e. a normal steady Taylor vortex flow, an upward motion of the Taylor vortices and helical vortex flow. In the case of the upward traveling motion, the tracer substance was transported with the traveling vortices in the main flow of cross-section and along the secondary flow streamlines at the outer-edge cell boundaries. Less

这项研究旨在开发不受欢迎的材料的新反应器和设备。为了讨论该方法的LD，由信息熵理论和使用遗传算法的优化方法组成。 - 接下来，混合对化学的泰勒涡流流动反应器的影响是通过使用二阶反应系统在泰勒涡流中进行的，是通过taylor vortex cell进行的。技术的访问经验清楚地揭示了两个与泰勒涡流的混合区，在雷诺数上，流动的流体在细胞边界附近。圆柱壁是孤立的混合区域的圆锥形壁涡流流，泰勒涡流的向上运动和螺旋涡流的流动，在上升运动的情况下，带有横截面主要流动涡流的示踪剂物质以及沿细胞边界的二次流动流。较少的