Experimental study of an ellipsoidal particle in tube Poiseuille flow

Abstract

Behaviors of a prolate ellipsoid inside circular tube Poiseuille flow are studied experimentally. In the study, Reynolds number Re ∈ (100,700) and the confinement ratio D/A ∈ (1.2,2.8) are considered, where D is the diameter of the tube and A is the length of the major axis of the ellipsoid. Two typical stable motion modes are identified, namely, the horizontal, and inclined modes. Then another inclined mode (inclined mode II) is found at high Reynolds number (Re ∈ (1000,3200)) and small D/A, and the inclined angle of ellipsoid increases with the increase of Re. The possible mechanism is explained. Our experiment shows that the lagging velocity U increases as Re increases. Further numerical analysis using FLUENT shows that due to the increase of U, the moment acting on the particle would make the inclined angle of the particle increase.

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Correspondence to Hai-bo Huang.

Additional information

Project supported by the National Natural Science Foundation of China (Grant No. 11772326).

Biography: Yuan-feng Cui (1997-), Male, Undergraduate

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Cui, Y., Chang, X. & Huang, H. Experimental study of an ellipsoidal particle in tube Poiseuille flow. J Hydrodyn 32, 616–622 (2020). https://doi.org/10.1007/s42241-020-0034-0

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Key words

  • Ellipsoidal particle
  • Poiseuille flow
  • circular tube
  • experiment