On the Motion of Spheres in a Fluid at Low Reynolds Numbers (Two Equal-Sized Spheres Moving Along Their Center Lines)

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概要

• 論文の詳細を見る

• The velocities and drag forces experienced by two equal-sized spheres freely falling along their center lines are measured using the "falling-spheres" technique at low Reynolds numbers. The width of the test tank, which has a square cross section, is 100 times the diameter of the spheres used. The measurements, with an estimated uncertainty of ±1.2%, show that the lower sphere experiences the Oseen drag and that the upper sphere experiences the Stokes drag, which was predicted by Stimson and Jeffery. Flow visualization using a naturally occurring phenomenon in glycerol illustrates the difference in the hydrodynamic drag force between the lower sphere and the upper sphere. The numerical calculations of Stimson-Jeffery's solution reveal in detail the occurrence of vortex flows within a closed separating region between the two spheres.

• 一般社団法人日本機械学会の論文
• 1989-08-15

著者

• MURAOKA Masahiro

  Department of Applied Chemistry, Faculty of Engineering, Osaka University

• Kumagai Teruo

  Department Of Mechanical Engineering Faculty Of Science And Technology Science University Of Tokyo

• Kumagai Teruo

  Department Of Mechanical Engineering Science Universiy Of Tokyo

• Muraoka M

  Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology

• Muraoka Masahiro

  Department Of Applied Chemistry Faculty Of Engineering Osaka Institute Of Technology

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