The possibility of the blood filtration and photo-bioreactor with the Taylor chaotic mixing vortex.

泰勒混沌混合涡流的血液过滤和光生物反应器的可能性。

• 批准号: 15560127
• 负责人: KAWAI Hideki
• 金额: $ 1.92万
• 依托单位: Muroran Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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-15560127/
• 关键词: Taylor vortex; Solid-Liquid separation; Chaos; Solid-liquid mixing; Microorganism; Laser Doppler Velocimeter; Ultrasonic Velocity Profiler; 微生物流動; パルサーレシーバ

Filtration for solid-liquid multiphase flowIn the aspect ratio (Γ) from 0.5 to 1.0, various vortex modes have occurred in response to the influence of the boundary layer (Ekman boundary layer) which exists near the vertical boundary ends. Especially at Γ=0.6, there is a domain where a pair of vortex which exists in the vertical line make self-excited oscillation each other. When the Reynolds number increases further passing over the region of the self-excited oscillation, this pair of vortex stops vibrating and form the other pair of vortex, which stands in a line horizontally. This mode is called Twin vortex mode, which is stable but exists in the very limited Reynolds region. Further increase of Reynolds number after the region of the stable Twin vortex mode, it begins to oscillate again but in faster periods.In the filtration experiment of Γ=3, the nylon particle, of which mean diameter is about 80μm and the specific gravity of 1.2, is used. In the experiment, the pressure drop is m … More easured with a pretty lower value as the rotation speed (Reynolds number) of the inner cylinder is increased. When the rotation speed is 0 (Re=0), most particle is accumulated on the filter in 7 minutes, and the test section becomes near transparently. From these results, the rotation of inner cylinder is much effective on reducing the pressure drop through the filtration process.Cultivation of microorganism with Taylor vortex flowSince it is difficult for treating a blood cell directly in the engineering laboratory, the similar vegetable photosynthesis microorganisms (chlorella and Spirulina) are used, and the fluid dynamic effect to cultivation by the Taylor vortex is investigated when 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 rotational speed is 150rpm and 250rpm, and the radius difference between the inner and outer cylinders is 25mm. The intensity of radiation and the cultivation conditions are same, and the cultivation time is about ten days.In the higher rotational speed of 250rpm, sedimentation of the microorganism on the bottom plate is not observed, whereas the amount of sedimentation is seen in the lower rotational speed after the 3-day's cultivation. Even in the higher rotational speed, the cell of microorganism has not been destroyed, and the well-activated state is kept in the both rotational speeds. Especially a higher specific growth rate of the Chlorella is observed in the case of cultivation with the sedimentation on the bottom.From these results, Chlorella microorganism seems to prefer the milder share flow condition to the high share flow with the larger rotational speed. Less

固液多相流的过滤在纵横比（Г）从0.5到1.0的范围内，由于垂直边界端附近存在的边界层（埃克曼边界层）的影响，出现了各种涡流模式。特别是在 Γ=0.6 时，存在垂直线上存在的一对涡旋相互自激振荡的区域。当雷诺数进一步增大，越过自激振荡区域时，这对涡旋停止振动，形成另一对水平排列的涡旋。这种模式称为双涡模式，它是稳定的，但存在于非常有限的雷诺区域。进入稳定双涡模区域后，雷诺数进一步增加，再次开始振荡，但周期更快。 在 Г=3 的过滤实验中，采用平均直径约为 80μm、比重为 1.2 的尼龙颗粒。实验中，随着内筒转速（雷诺数）的增加，压降减小，值相当低。当转速为0（Re=0）时，7分钟内大部分颗粒积聚在过滤器上，测试部分变得接近透明。从这些结果来看，内筒的旋转对于降低过滤过程的压降非常有效。利用泰勒涡流培养微生物由于在工程实验室中直接处理血细胞很困难，因此使用类似的植物光合作用微生物（小球藻和螺旋藻），并研究了泰勒涡流培养时的流体动力学效果 γ=1。实际尺寸，分别选择内筒直径28mm、外筒直径75mm。转速为150rpm和250rpm，内外筒半径差为25mm。辐射强度和培养条件相同，培养时间约为10天。在250rpm的较高转速下，未观察到微生物在底板上的沉降，而在较低转速下培养3天后即可看到沉降量。即使在较高的转速下，微生物的细胞也没有被破坏，并且在两种转速下都保持良好的活化状态。特别是在底部沉淀培养的情况下，观察到小球藻的比生长率较高。从这些结果来看，小球藻微生物似乎更喜欢较温和的共享流条件而不是具有较大转速的高共享流条件。较少的

项目成果

Rotating Filtration with Taylor Couette Vortex Flow for Particle-liquid Separation

使用 Taylor Couette 涡流旋转过滤进行颗粒-液体分离

• 发表时间: 2004
• 期刊: Proceeding of 3^<rd> International Symposium on Two-Phase Flow Modeling and Experimentation
• 作者: H.Kawai;H.Takahashi;A.Suzuki
• 通讯作者: A.Suzuki

Flow Visualization of Taylor Vortex with a Small Aspect ratio

小纵横比泰勒涡流动可视化

• 发表时间: 2003
• 期刊: Proceedings of 7th Asian Symposium on Visualization conf24a138
• 作者: H.Kawai;K.Shibata;H.Takahashi
• 通讯作者: H.Takahashi

木倉宏成, 岸川真吾, 河合秀樹, 有冨正憲, 高橋洋志: "アスペクト比の小さいTaylor Couette渦流れのUVP計測"日本機械学会流体工学部門講演会講演論文集. 309/1-309/4 (2003)

Hiroshige Kikura、Shingo Kishikawa、Hideki Kawai、Masanori Aritomi、Hiroshi Takahashi：“小纵横比的 Taylor Couette 涡流的 UVP 测量”日本机械工程师学会流体工程分会论文集 309/1-309/4（2003 年）。 ）

Kawai, H., Takahashi, H.: "Visualization of Taylor-Couette Vortex with a short annulus"Journal of Visualization. Vol.6, No.4. 323 (2003)

Kawai, H.，Takahashi, H.：“短环泰勒-库埃特涡的可视化”可视化杂志。

H.Kawai, H.Takahashi, A.Suzuki: "ROTATING FlLTRATION WITH TAYLOR-COUETTE VORTEX FLOW FOR PARTICLE-LIQUID SEPARATION"3rd International Symposium on Two-Phase Flow Modeling and Experimentation. (予定). (2004)

H.Kawai、H.Takahashi、A.Suzuki：“利用泰勒-库埃特涡流进行颗粒-液体分离的旋转过滤”第三届两相流建模和实验国际研讨会（计划）。