Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe

Osamu Moriyama, Naoya Kuroiwa, Sayako Tateda, Taichi Arai, Atsushi Awazu, Yoshihiro Yamazaki, Mitsugu Matsushita

研究成果: Article

6 引用 (Scopus)

抄録

We show experimental results regarding how density waves of granular particles flowing through a vertical glass pipe emerge by controlling two kinds of parameters; air flow out of a flask attached to the bottom-end of the pipe and inflow of granular materials from a hopper attached to the top-end. It was found, by controlling the former parameter, that the most important factor for the onset of density waves is the strong interaction between granular particles and the air. It was also found, by changing the latter parameter, that there is a sharp transition from the uniform flow to the density waves at the threshold value of the inflow rate of granules. Power spectra of density waves show a clear power-law form S(f) ∼ f, where α ≃ 4/3. The value of a is robust in that, once density waves occurred, it was independent of the two parameters described above.

元の言語English
ページ(範囲)136-146
ページ数11
ジャーナルProgress of Theoretical Physics Supplement
150
出版物ステータスPublished - 2003
外部発表Yes

Fingerprint

hoppers
flasks
uniform flow
granular materials
air flow
power spectra
thresholds
glass
air

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Moriyama, O., Kuroiwa, N., Tateda, S., Arai, T., Awazu, A., Yamazaki, Y., & Matsushita, M. (2003). Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe. Progress of Theoretical Physics Supplement, 150, 136-146.

Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe. / Moriyama, Osamu; Kuroiwa, Naoya; Tateda, Sayako; Arai, Taichi; Awazu, Atsushi; Yamazaki, Yoshihiro; Matsushita, Mitsugu.

:: Progress of Theoretical Physics Supplement, 巻 150, 2003, p. 136-146.

研究成果: Article

Moriyama, O, Kuroiwa, N, Tateda, S, Arai, T, Awazu, A, Yamazaki, Y & Matsushita, M 2003, 'Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe', Progress of Theoretical Physics Supplement, 巻. 150, pp. 136-146.
Moriyama, Osamu ; Kuroiwa, Naoya ; Tateda, Sayako ; Arai, Taichi ; Awazu, Atsushi ; Yamazaki, Yoshihiro ; Matsushita, Mitsugu. / Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe. :: Progress of Theoretical Physics Supplement. 2003 ; 巻 150. pp. 136-146.
@article{10b8d5fc2c6b4fe994a8615bc16bd8dd,
title = "Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe",
abstract = "We show experimental results regarding how density waves of granular particles flowing through a vertical glass pipe emerge by controlling two kinds of parameters; air flow out of a flask attached to the bottom-end of the pipe and inflow of granular materials from a hopper attached to the top-end. It was found, by controlling the former parameter, that the most important factor for the onset of density waves is the strong interaction between granular particles and the air. It was also found, by changing the latter parameter, that there is a sharp transition from the uniform flow to the density waves at the threshold value of the inflow rate of granules. Power spectra of density waves show a clear power-law form S(f) ∼ f-α, where α ≃ 4/3. The value of a is robust in that, once density waves occurred, it was independent of the two parameters described above.",
author = "Osamu Moriyama and Naoya Kuroiwa and Sayako Tateda and Taichi Arai and Atsushi Awazu and Yoshihiro Yamazaki and Mitsugu Matsushita",
year = "2003",
language = "English",
volume = "150",
pages = "136--146",
journal = "Progress of Theoretical Physics",
issn = "0033-068X",
publisher = "Yukawa Institute for Theoretical Physics",

}

TY - JOUR

T1 - Transition to Density Waves of Granular Particles Flowing through a Vertical Pipe

AU - Moriyama, Osamu

AU - Kuroiwa, Naoya

AU - Tateda, Sayako

AU - Arai, Taichi

AU - Awazu, Atsushi

AU - Yamazaki, Yoshihiro

AU - Matsushita, Mitsugu

PY - 2003

Y1 - 2003

N2 - We show experimental results regarding how density waves of granular particles flowing through a vertical glass pipe emerge by controlling two kinds of parameters; air flow out of a flask attached to the bottom-end of the pipe and inflow of granular materials from a hopper attached to the top-end. It was found, by controlling the former parameter, that the most important factor for the onset of density waves is the strong interaction between granular particles and the air. It was also found, by changing the latter parameter, that there is a sharp transition from the uniform flow to the density waves at the threshold value of the inflow rate of granules. Power spectra of density waves show a clear power-law form S(f) ∼ f-α, where α ≃ 4/3. The value of a is robust in that, once density waves occurred, it was independent of the two parameters described above.

AB - We show experimental results regarding how density waves of granular particles flowing through a vertical glass pipe emerge by controlling two kinds of parameters; air flow out of a flask attached to the bottom-end of the pipe and inflow of granular materials from a hopper attached to the top-end. It was found, by controlling the former parameter, that the most important factor for the onset of density waves is the strong interaction between granular particles and the air. It was also found, by changing the latter parameter, that there is a sharp transition from the uniform flow to the density waves at the threshold value of the inflow rate of granules. Power spectra of density waves show a clear power-law form S(f) ∼ f-α, where α ≃ 4/3. The value of a is robust in that, once density waves occurred, it was independent of the two parameters described above.

UR - http://www.scopus.com/inward/record.url?scp=0344980694&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0344980694&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0344980694

VL - 150

SP - 136

EP - 146

JO - Progress of Theoretical Physics

JF - Progress of Theoretical Physics

SN - 0033-068X

ER -