GS14 テイラー・ディーン流れを利用したマイクロミキサの数値的研究 : 混合に及ぼすアスペクト比と流入条件の影響

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  • GS14 Numerical Study of the Micromixer Using the Taylor-Dean Flow : Effects of Aspect Ratio and Inflow Condition on the Mixing

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Chaotic mixing in a curved-rectangular channel flow is studied experimentally and numerically. Two walls of the channel (inner and top walls) rotate around the center of curvature and a pressure gradient is imposed in the direction toward the exit of the channel. This flow is a kind of Taylor-Dean flow. There are two parameters dominating the flow, the Dean number De (∝ the pressure gradient) and the Taylor number Tr (∝ the angular velocity of the wall rotation). In the present paper, we analyze the physical mechanism of chaotic mixing in the Taylor-Dean flow by comparing experimental and numerical results. It is found that good mixing performance is obtained in the case of De ≤ 0.1Tr. This tendency appears more strongly if large aspect ratio and Condition I.

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