Dynamics of Granular Flow through a Vertical Pipe under the Control of Inflow Rate.

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  • Yamazaki Yoshihiro
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551
  • Tateda Sayako
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551
  • Awazu Atsushi
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551
  • Arai Taichi
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551
  • Moriyama Osamu
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551
  • Matsushita Mitsugu
    Department of Physics, Chuo University, Kasuga, Bunkyo-ku, Tokyo 112-8551

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Abstract

We present experimental results regarding the dynamical property of granular flow through a vertical glass pipe under the control of inflow rate. It was found that there exists a critical inflow rate for the formation of density waves. The power spectrum of the density waves exhibits clear power-law behavior, S( f) ∼ f-α, with α\simeq 4/3. This value of α is robust under variation of inflow rate.

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