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Motion of a single capsule in a hydraulic pipeline

Published online by Cambridge University Press:  21 April 2006

Y. Tomita ,
M. Yamamoto  and
K. Funatsu
Y. Tomita
Affiliation:
Department of Mechanical Engineering, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan
M. Yamamoto
Affiliation:
Department of Mechanical Engineering, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan
K. Funatsu
Affiliation:
Department of Mechanical Engineering, Kyushu Institute of Technology, Tobata, Kitakyushu 804, Japan
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Abstract

The method of characteristics is used to numerically analyse the motion of a single solid capsule in a hydraulic horizontal straight pipe. The capsule is assumed to be a point mass and the coaxial-annular-flow model around the capsule is used to derive the boundary conditions for water flow at the capsule discontinuity. The results are compared with experimental measurements which were taken in a pipeline 28 m in length and with an inside diameter of 40 mm. The capsule had wheels to keep its position coaxial with the pipe axis and always had a higher velocity than the water flow. The measurements are explained quite well by the analysis.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 171 , October 1986 , pp. 495 - 508
Copyright
© 1986 Cambridge University Press

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References

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