Particle dynamics of the passive layer within a granular drum using wavelet analysis

Mou, Shihang; Yang, Hui; Li, R.; Zhang, G.H.; Sun, Qiang; Kong, Ping

doi:10.1016/j.powtec.2018.11.108

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…Each initial local avalanche propagates from the nucleus to the surroundings. Since the time of each nucleation is different, the size of avalanches in line with experimental results [21]. In Fig.…”

Section: Nucleation and Propagationsupporting

confidence: 85%

Numerical simulation of avalanche propagation dynamics in a rotating drum

et al. 2021

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Section: Nucleation and Propagationsupporting

confidence: 85%

Numerical simulation of avalanche propagation dynamics in a rotating drum

et al. 2021

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“…The velocity of surface particle flow will increase when the inclined angle enlarged. [12,13] To further explore that particles in the high-speed area perturb the neighboring particles along the axial direction in mid-to-edge pattern, we investigate the spatial distribution of the velocity of the surface particulate flow. In the center of the high speed are, a band region is chosen as 22 mm and 200 mm in radial and axial directions respectively.…”

Section: Mid-to-edge Patternmentioning

confidence: 99%

“…In addition, as the particle shape has a significant influence on granular dynamics, the avalanches for irregular particles have more complex and unique characteristics compared to the spherical particles. [5][6][7][8][9][10][11][12][13][14] Adrian et al [15] investigated single avalanches created by perturbing a static layer of glass beads on a rough inclined plane. The authors observed two types of avalanching behavior with the increasing of the inclined angle.…”

Section: Introductionmentioning

confidence: 99%

Avalanching patterns of irregular sand particles in continual discrete flow*

Han

Zhang

et al. 2020

Chinese Phys. B

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We investigate the flow patterns of irregular sand particles under avalanching mode in a rotating drum by using the spatial filtering velocimetry technique. By exploring the variations of velocity distribution of granular flow, we find a type of avalanching pattern of irregular sand particles which is similar to that of spherical particles flow. Due to the fact that the initial position of avalanche in this pattern locates at the middle of the drum and the avalanche propagates toward the edge area gradually, we named it as mid-to-edge avalanching pattern. Furthermore, we find another avalanching pattern which slumps from the edge and propagates toward the opposite edge of the flow surface, named as edge-to-edge pattern. By analyzing the temporal and spatial characteristics of these two types of avalanching patterns, we discover that these two types of avalanche patterns are caused by that the avalanching particles constantly perturb the axial adjacent particles. Thus, the particles on the flow surface are involved in avalanching sequentially in order of the axial distance from the initial position.

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“…Although PIV does not need a clear image with each particle, in order to obtain large signal-to-noise ratio (SNR) images, the experimental system requires very uniform illumination which is difficult to realize since the imaging and lighting system with the observed particles and accompanying scene have a complex interaction. [9][10][11][12][13][14] Spatial filtering velocimetry (SFV) is another method that can measure granular flow speed. Compared with the men-tioned methods above, the main advantages of this method are high resolution, non-contact, and strong environmental adaptability.…”

Section: Introductionmentioning

confidence: 99%

Improved spatial filtering velocimetry and its application in granular flow measurement*

Kong

Wang

et al. 2020

Chinese Phys. B

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Spatial filtering velocimetry (SFV) has the advantages of simple structure, good stability, and wide applications. However, the traditional linear CCD-based SFV method requires an accurate angle between the direction of linear CCD and the direction of moving object, so it is not suitable for measuring a complex flow field or two-dimensional speed in a granular media. In this paper, a new extension of spatial filtering method (SFM) based on high speed array CCD camera is proposed as simple and effective technique for measuring two-dimensional speed field of granular media. In particular, we analyzed the resolution and range of array CCD-based SFV so that the reader can clarify the application scene of this method. This method has a particular advantage for using orthogonal measurement to avoid the angle measurement, which were problematic when using linear CCD to measure the movement. Finally, the end-wall effects of the granular flow in rotating drum is studied with different experimental conditions by using this improved technique.

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Particle dynamics of the passive layer within a granular drum using wavelet analysis

Cited by 10 publications

References 28 publications

Numerical simulation of avalanche propagation dynamics in a rotating drum

Numerical simulation of avalanche propagation dynamics in a rotating drum

Avalanching patterns of irregular sand particles in continual discrete flow*

Improved spatial filtering velocimetry and its application in granular flow measurement*

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