F212 空間周期的な 3 次元流によるカオス混合の数値的研究

概要

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The chaotic mixing of fluids due to a creeping flow in a spatially periodic system called the partitioned-pipe mixer (PPM) is studied by using a numerically calculated velocity field. The PPM is composed of alternatively placed horizontal and inclined plates of different lengths in a cylindrical duct rotating with a constant angular velocity. This rotation and a pressure gradient in the axial direction generate the flow in the PPM. We examine the dependence of the mixing performance for many periods on β', the ratio of the typical velocity of the flow due to the rotation of the cylindrical wall to that due to the pressure gradient, and α, of the lengths of the neighboring plates. We find that increasing β' is not a appropriate way to attain the uniform mixing for because of the increase in the area of a backward flow. However, changing α is effective for the uniform mixing.
日本流体力学会の論文
2002-07-23