1605 落下球体周りの粘弾性流体の流れ場計測(OS16-1 非ニュートン流体の流動現象,オーガナイズドセッション)

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  • 1605 Measurement of the viscoelastic flow around a falling sphere

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Velocity vector field of 1.0 wt% polyacrylamide (PAA) solution around a falling sphere was obtained with particle image velocimetry (PIV). Paths of fluid particles were calculated according to the obtained velocity field. Particles near the falling sphere are driven to downward at first. After that the particles come back to almost initial position while forming negative wake. Vibrations of the particles were observed before the particles settle terminal position. The amplitude, center and frequency of the vibration depend on the distance between the fluid particle and the path of the sphere.

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