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; 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

固液多相流的过滤纵横比（γ）从0.5到1.0，发生了各种涡流模式，响应在垂直边界末端附近的边界层（Ekman边界层）的影响下。特别是在γ= 0.6时，有一个结构域，垂直线中存在的一对涡流使自振荡的振荡彼此之间。当雷诺数数量进一步增加超过自激发振荡的区域时，这对涡流会停止振动并形成另一对涡流，该涡流位于线上。该模式称为双涡流模式，该模式稳定，但存在于非常有限的雷诺区域中。在稳定双涡流模式区域的区域后，雷诺数的进一步增加，它开始再次振荡，但在更快的时间内。在γ= 3的过滤实验中，尼龙粒子的尼龙颗粒（平均直径约为80μm），特异性重力为1.2。在实验中，随着内部气缸的旋转速度（雷诺数）的增加，压力下降的速度更加轻松。当旋转速度为0（RE = 0）时，大多数粒子在7分钟内积聚在滤波器上，并且测试部分近乎透明。从这些结果中，内部气缸的旋转对于通过过滤过程降低压降非常有效。用泰勒涡流培养微生物，很难直接在工程实验室中直接治疗血细胞，类似的植物光合作用的微生物（毒物和螺旋杆菌）在使用类似的植物光合作用的培养和动态效应时，是通过培养的效果。 γ= 1。至于实际尺寸，内部气缸的直径分别为28mm，并且外部75mm之一是选择的。旋转速度为150rpm和250rpm，内部和外缸之间的半径差为25mm。辐射和培养条件的强度相似，培养时间约为十天。在250rpm的较高旋转速度中，未观察到底板上微生物的沉积，而在3天培养后，在较低的旋转速度中可以看到沉积量。即使在较高的旋转速度下，微生物的细胞也没有被破坏，并且在两个旋转速度下都保持良好的激活状态。特别是在培养的情况下观察到较高的小球藻的特异性生长速率，底部的沉积物。从这些结果中，小球藻微生物似乎更喜欢米勒的共享流动条件，而不是较大的旋转速度，而不是高共享流动。较少的