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The analysis of a chaotic mixing method with a Taylor vortex flow and the possibility to a blood filtration system and a photo-bioreactor.

泰勒涡流混沌混合方法的分析以及血液过滤系统和光生物反应器的可能性。

基本信息

批准号：
17560133
负责人：
KAWAI Hideki
金额：
$ 1.98万
依托单位：
Myrarab Institute of Technolony
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

Chaotic mixing method and its application to the filtration system for solid-1iquid multipnase flowThe main vortex mode with the extra smaller vortex has occurred at the aspect ratio (Γ) of 1.0 and the radius ratio(η)of 0.375 under the rigid boundary layer (Ekman boundary layer), which exists near the vertical boundary ends. This vortex keeps its original shape even in the high Reynolds number (Re) of 20,000 in the region of the turbulence. In the filtration system with Γ=3 and η=0.375, the nylon particle (mean diameter is about 80 μm and the specific gravity of 1.2) is used, and at Re=0, most particle is accumulated on the filter surface in a few minutes, but the pressure drop is confirmed to keep in lower level when the rotating Re is increased. This fact shows the clear effect on reducing the pressure drop of the filtration process. However, the pulsating suction of the flow would sometimes cause the instability in filtration, which is not clarified yet.Cultivation of microorganism … More With Taylor vortex flowSince it is difficult to use a blood cell directly in the engineering laboratory, the similar vegetable photosynthesis microorganisms are used and the fluid dynamic effect on cultivation by the Taylor vortex is investigated at Γ=1. As for the actual size, the diameter of the inner cylinder is 28mm, and the one of the outer 75mm, are selected respectively. The cultivation time is about ten days. As the result, a specific growth rate (p) increases with the increase of Re. But in the very limited region of 6000<Re<8250, μ takes a steep sloop, and after then, it turns to sharp decline in 8250<Re<9600. In Re>9600, μ increases again with a gentle gradient curve. p shows the maximum value at Re=8250, but not becomes the same value at Re=18000, although the sedimentation rate is same at Re=18000 as Re=8250. This fact indicates the flow structure is different between both Reynolds numbers. This flow pattern is measured using Ultrasound Doppler Profiler and shows the averaged velocity profiles are quite different between Re=8000 and 26000. Each flow is more turbulent, but it is well observed that the flow at Re=8000 has one vortex with an extra vortex in the bottom region and the one at Re=26000 has pair vortices in upper and lower regions. This difference would influence the specific growth rate. In this reactor, Spirulina is alive until Re=40000 without disturbing from the share flow. Less

混沌混合方法及其在固液多相流过滤系统中的应用在垂直边界端附近的刚性边界层（Ekman边界层）下，当长径比（r）为1.0，半径比（η）为0.375时，出现了具有特小涡的主涡模式。即使在湍流区域中的20，000的高雷诺数（Re）下，该涡流也保持其原始形状。在r =3，η=0.375的过滤系统中，采用尼龙颗粒（平均粒径约80 μm，比重约1.2），当Re=0时，大多数颗粒在几分钟内聚集在过滤器表面，但随着旋转Re的增加，压降保持在较低的水平。这一事实显示了对降低过滤过程的压降的明显效果。然而，流体的脉动抽吸有时会引起过滤的不稳定，这一点目前还不清楚。微生物培养 ...更多信息由于在工程实验室中很难直接使用血细胞，因此使用类似的植物光合微生物，并研究了在Γ=1时泰勒涡流对培养的流体动力学效应。在实际尺寸上，内筒直径为28mm，外筒直径为75mm。培养时间约为10天。结果，比生长速率（p）随着Re的增加而增加。但在6000<Re<8250这一非常有限的区域内，μ出现了一个陡峭的下降，然后在8250<Re 9600处又急剧下降<9600. In Re>，μ又以平缓的梯度曲线上升。p在Re=8250时显示最大值，但在Re=18000时不变为相同值，尽管在Re=18000时沉降速率与Re=8250时相同。这一事实表明，流动结构是不同的两个雷诺数。使用超声多普勒轮廓仪测量该流动模式，并显示Re=8000和26000之间的平均速度轮廓有很大不同。每种流动都更加湍流，但可以很好地观察到，Re=8000时的流动在底部区域有一个带有额外涡的涡，Re=26000时的流动在上部和下部区域有成对涡。这种差异会影响特定的增长率。在此反应器中，螺旋藻是活着的，直到Re=40000没有干扰的份额流。少

项目成果

期刊论文数量（28）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Visualization of Rotating Filtration System with Taylor-Couette Flow for Particle-liquid Separation or Water-purification

用于颗粒-液体分离或水净化的泰勒-库埃特流旋转过滤系统的可视化

DOI：
发表时间：
2006
期刊：
Abstracts of 5th International Conference on Unsteady-state Process in Catalysis
影响因子：
0
作者：
Hideki Kawai;Hiroshi Takahashi;Hiroshige Kikura;Hajime Yamashita
通讯作者：
Hajime Yamashita

Partcle behavior and Heat Transfer around the Inner Pipes with a Circulating Fluidized Bed

循环流化床内管周围的颗粒行为和传热

DOI：
发表时间：
2006
期刊：
Abstracts of fifth International Conference on Unsteady-state Process in Catalysis
影响因子：
0
作者：
Hideki Kawai;Fumitake Tanaka;Hiroshi Takahashi
通讯作者：
Hiroshi Takahashi

Visualization of a Limit Cycle Orbit in a Taylor Vortex Flow with a Short Annulus

短环泰勒涡流中极限环轨道的可视化