Trajectory characteristics of spherical particle sedimentation under the effect of gravity were studied using particle image velocimetry，PIV. The law of particle sedimentation, the experiment of different releasing locations under same Reynolds numbers and the same releasing location under different Reynolds numbers were examined. The results show that when Re≤100, despite different globule releasing locations, final stable settlement position of the particles was at the center under the same Re. When the particle's releasing position was symmetrical along the centerline, the trajectory of the particle sedimentation was also symmetrical along the center. With the increase of Re, the final sedimentation trajectory of the particle changed from a stable straight line to a stable periodic swing curve. In conclusion, the equilibrium position of the particles was independent of the initial release position of the particles and the value of Re, but the trajectory of the particles was related to the position and Re. The simulated and experimental results were almost the same.
Jianzhong CHANG Ying ZHANG Hantao LIU
. Trajectory Characteristics of Spherical Particle Sedimentation under Isothermal Conditions[J]. The Chinese Journal of Process Engineering, 2018
, 18(1)
: 29
-34
.
DOI: 10.12034/j.issn.1009-606X.217167
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