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级流过滤系统中的应用在刚性边界层下，长径比（Г）为1.0、半径比（η）为0.375时出现具有超小涡旋的主涡模（埃克曼边界层），存在于垂直边界末端附近，即使该区域的雷诺数 (Re) 高达 20,000，该涡流仍保持其原始形状。在 Γ=3、η=0.375 的过滤系统中，使用尼龙颗粒（平均直径约为 80 μm，比重为 1.2），在 Re=0 时，大部分颗粒积聚在过滤器上。几分钟内就会达到表面，但是当旋转Re增加时，压降被证实保持在较低水平，这一事实表明对降低过滤过程的压降有明显的效果。流动的脉动吸力有时会导致过滤不稳定，目前尚不清楚。微生物的培养…更多使用泰勒涡流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作用微生物和考察了γ=1时泰勒涡对培养的流体动力学影响。实际尺寸为内筒直径为28mm，外筒直径为28mm。分别选择培养时间为十天左右，结果，比生长率（p）随着Re的增加而增加，但在6000<Re<8250的非常有限的区域内，μ呈现陡峭的曲线。，之后在8250<Re<9600处急剧下降，在Re>9600处，μ再次以平缓的梯度曲线增加，在Re=8250处显示最大值。尽管 Re=18000 时的沉降率与 Re=8250 时的沉降率相同，但这一事实表明两个雷诺数之间的流动结构不同。该流动模式是使用超声波多普勒轮廓仪测量的，并显示了流动模式。 Re=8000 和 26000 之间的平均速度分布有很大不同。每种流动都更加湍流，但可以很好地观察到 Re=8000 处的流动有一个涡流底部区域有一个额外的涡流，而 Re=26000 处的上部和下部区域有一对涡流，这种差异会影响该反应器中的特定生长速率，直到 Re=40000 为止，不会受到共享流的干扰。。较少的

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）

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 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

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