Density fluctuations during the discharge of granular material from a two-dimensional bin

A. Medina; J. Andrade; C. Treviño; E. Luna

Density fluctuations during the discharge of granular material from a two-dimensional bin

A. Medina, J. Andrade, C. Treviño, E. Luna

Research output: Contribution to journal › Article › peer-review

Abstract

We have found experimentally the existence of strong density fluctuations (density waves) during the discharge of monodisperse granular material from vertical flat bins. These density waves follow, approximately, a 1/f^α fractal noise, where α = 1.32, just above the exit of the bin and, a 1/f noise, just below the exit. The corresponding rescaled range analysis (Mandelbrot-Van Ness fractional Brownian motion) for the fractal noise gives a Hurst parameter H = 0.16 and a fractal dimension D = 1.84.

Original language	English
Pages (from-to)	733-741
Number of pages	9
Journal	Revista Mexicana de Fisica
Volume	42
Issue number	5
State	Published - Oct 1996
Externally published	Yes

Cite this

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abstract = "We have found experimentally the existence of strong density fluctuations (density waves) during the discharge of monodisperse granular material from vertical flat bins. These density waves follow, approximately, a 1/fα fractal noise, where α = 1.32, just above the exit of the bin and, a 1/f noise, just below the exit. The corresponding rescaled range analysis (Mandelbrot-Van Ness fractional Brownian motion) for the fractal noise gives a Hurst parameter H = 0.16 and a fractal dimension D = 1.84.",

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AU - Andrade, J.

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AU - Luna, E.

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N2 - We have found experimentally the existence of strong density fluctuations (density waves) during the discharge of monodisperse granular material from vertical flat bins. These density waves follow, approximately, a 1/fα fractal noise, where α = 1.32, just above the exit of the bin and, a 1/f noise, just below the exit. The corresponding rescaled range analysis (Mandelbrot-Van Ness fractional Brownian motion) for the fractal noise gives a Hurst parameter H = 0.16 and a fractal dimension D = 1.84.

AB - We have found experimentally the existence of strong density fluctuations (density waves) during the discharge of monodisperse granular material from vertical flat bins. These density waves follow, approximately, a 1/fα fractal noise, where α = 1.32, just above the exit of the bin and, a 1/f noise, just below the exit. The corresponding rescaled range analysis (Mandelbrot-Van Ness fractional Brownian motion) for the fractal noise gives a Hurst parameter H = 0.16 and a fractal dimension D = 1.84.

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JO - Revista Mexicana de Fisica

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Density fluctuations during the discharge of granular material from a two-dimensional bin

Abstract

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