Viscoelastic Fluid Flow in the Half-Spherical Gap in the Rotation of Outer Sphere in Dual Spheres.

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  • 二重球殻の外球殻回転時における粘弾性流体の半球間隙流れ
  • ニジュウ キュウカク ノ ガイキュウカク カイテンジ ニ オケル ネンダンセイ リュウタイ ノ ハンキュウ カンゲキ ナガレ

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Abstract

Flow of viscoelastic fluid contained between a stationary inner half-sphere and a rotating outer sphere was studied experimentally. Measurements of the stationary torque and thrust of the inner half-sphere were made. The situation of uniquely appearing flow for viscoelastic fluids were obtained by flow visualization. The measurement results of torque and thrust showed that Reynolds number and a gap ratio influenced the torque characteristics substantially, while the thrust is much effected by the elastics effect. Resultant experiment data was arranged by empirical formula for given geometric configuration, using the Deborah number together with the generalized Reynolds number.

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