GS52 Numerical Study of the Micromixer Using the Taylor-Dean Flow : Effect of the Channel Aspect Ratio

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  • GS52 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 : 流路のアスペクト比の効果

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Chaotic mixing in a curved-rectangular channel flow is studied numerically. One wall of the channel (inner wall) 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 fluid mixing and velocity field. It is found that good mixing performance is obtained in the case of De/Tr ≤ 1/6. This tendency appears more strongly if aspect ratio is large.

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