A Study of Motion of a Sphere in Air Flow through Horizontal Pipe

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概要

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• The present study was carried out to obtain basic data for the numerical simulation of pneumatic transport of solid particles. In the equation of motion of a spinning sphere, a force F^^→_v due to the velocity gradient of air flow through pipe was newly proposed. In the preliminary experiment, the drag coefficient C_d, coefficient of restitution e, friction coefficient μ_d were measured. Their values were substituted into the corresponding terms of the equation of motion. The equation of motion was numerically soved by the Runge-Kutta-Gill method. The values of lift coefficient C_L and coefficient G_s for F^^→_v were decided by making comparison between the computed and experimental results of the trajectory of sphere. As a result, C_d=0.6, G_s=0.1, C_L=(1.6-2.0) d_Pω/|W^^→| and μ_d=0.12-0.20 were obtained for the Reynolds number R_<e.p> =2000-6000.

• 一般社団法人日本機械学会の論文

著者

• Yamamoto Fujio

  Faculty Of Engineering Fukui University

• Yamamoto Fujio

  Faculty Of Fukui University

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• A Study of Motion of a Sphere in Air Flow through Horizontal Pipe

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