脈動流におけるくぼみ付き流路内の流体混合と圧力損失

概要

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Fluid mixing and pressure drop in a grooved channel are studied numerically for pulsatile flow at an intermediate Reynolds number. In particular, the imposed oscillatory frequency effect is received attention for small and large oscillatory fractions of the flow rate. Hydrodynamic resonance takes place at the imposed frequency close to the self-sustained oscillatory frequency even for a large oscillatory fraction, and the time-averaged vortex strength has a peak at its frequency. However, the pressure drop tends to increase as the imposed frequency becomes large, in the range considered here. Fluid particle ejection from the groove and Lyapunov exponent near the groove wall are examined to represent the fluid mixing characteristics. The best fluid mixing takes place near the frequency for hyrodynamic resonance. Also, flow visualization studies support the numerical simulation results.
一般社団法人日本機械学会の論文
1999-12-25