Flowability of granular materials with industrial applications - An experimental approach

Torres-Serra, Joel; Romero, E.; Ferran, Antonio Rodríguez; Caba, Joan; Arderiu, X. Fuentes; Padullés, Josep-Manel; González, Juanjo

doi:10.1051/epjconf/201714003068

Cited by 4 publications

(5 citation statements)

References 35 publications

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“…This condition appears at a diameter of 290 μm, producing the lowest fluid cavity. The phenomena that can be observed from these conditions are as follows: (1) In the VFG, the formation of granular heights is influenced by the granular bond, thickening shear, and water's ability to pass through the gaps between the granules. (2) In the FG, the ability to escape the fluid is high, but the granular bond does not affect, so the fluid cavity develops.…”

Section: Effect Of Granular Diameter On Instability After Upward Imentioning

confidence: 99%

“…The lack of standardized work for the industry according to the flowability assessment of powders and grains indicates the need for a methodology capable of observing actual handling conditions. Material flow ability needs to be observed to support the work process [1]. The flowability of granular materials plays an important role in production and processing because it defines the quality of the product [2].…”

Section: Introductionmentioning

confidence: 99%

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An investigation of granular material movement due to instability post impinging upward fluid

Yudiyanto

Wardana

Widhiyanuriyawan

et al. 2020

EEJET

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Granular is a form of material that is widely used in the industry. To move the granular material, energy is needed to form a flow of granular. Granular instability can be utilized to move granular material. Prevention of jamming and clogging is done by breaking down the parts of the granular, which are locking. Impinging fluid in the granular is used to create granular instability. An observation was made using the experimental method. The granular in the Hele-Shaw cell is shot with fluid in the granular body and results in instability motion. Fluid impinging breaks granular bonds and forms fluid cavities. Furthermore, the fluid cavity moves upward due to unstable conditions. Granular with a strong bond is loose in the form of the agglomerate. Agglomerate is destroyed in the process of moving because there is a drag force. Granular with weak bonds tries to maintain individually form fingering. Granular moves down in the settling process to find a stable position. Instability is affected by the bonds between the grains. A comparison between the cohesion force and the mass weight of the particles is expressed as a granular Bond number B og. In glass sand material, strong granular bonds occur at granular sizes below 100 µm. Granular bonds affect the movement of instability in groups. The value of the granular Bond number is greater than 1. At sizes of 100 to 230 µm, the granular bond still affects the granular instability with the fingering pattern in the granular motion. The value of the granular Bond number is close to 1. Granular sizes above 230 µm indicate the presence of non-dominant bonds between the grains. The individual granular mass is higher than the cohesion force that occurs at the interface between the granular, and the granular Bond number value is less than 1

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Section: Effect Of Granular Diameter On Instability After Upward Imentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An investigation of granular material movement due to instability post impinging upward fluid

Yudiyanto

Wardana

Widhiyanuriyawan

et al. 2020

EEJET

View full text Add to dashboard Cite

show abstract

“…Therefore, an experimental setup for the characterisation of a granular material's behaviour should more-or-less replicate the handling process and equipment [2]. From this point of view, many investigations have been focused on the characterisation of complex interactions [7] and a related experimental estimation of the friction in granular materials under various loading conditions, such as gravity [8][9][10], shear [11,12] and uniaxial [2,3] compressive loading.…”

Section: Introductionmentioning

confidence: 99%

Digital Image Correlation Based Internal Friction Characterization in Granular Materials

et al. 2020

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Based on the realization that Newtonian fluids have the unique property to redirect the forces applied to them in a perpendicular direction, a new apparatus, called the Granular Friction Analyzer (GFA), and the related GFA index, were proposed for characterizing the internal friction and related flow behavior of granular materials under uniaxial compression loading. The calculation of the GFA index is based on the integration of the internal pressure distribution along the cylinder wall, within which the granular material is being uniaxially compressed by a piston. In this paper an optical granular friction analyzer (O-GFA) is presented, where a digital image correlation (DIC) method is utilized to assess the cylinder strains used to calculate the internal pressure distribution. The main advantage of using the DIC method is that the starting point (piston–powder contact point) and the length of the integration considering the edge effects can be defined. By using the DIC full-field, instead of a few points strain measurements, a 2% improvement of the GFA index’s accuracy has been achieved and its robustness with respect to the number of points has been demonstrated. Using the parametric error analysis it has been shown that most of the observed total error (7.5%) arises from the DIC-method-based measurements of the strains, which can be improved by higher-resolution cameras and DIC algorithms for the strain evaluation. Additionally, it was shown that the GFA index can be used for determining the well-known Janssen model parameters. The latter was demonstrated experimentally, by testing three SS 316 L granular material samples with different mean particle sizes. The results confirm that the mean particle size regulates the internal friction of granular materials.

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“…We have developed a new fully-instrumented granular column collapse apparatus [52,53] that provides for a direct observation of granular flow regimes generated in actual handling conditions [54], and suitable for a wide range of powders and grains with particle sizes from the scale of µm to mm. The apparatus allows us to characterise the effect of their varying physical and mechanical properties at the grain and bulk scales on their flowability.…”

Section: Introductionmentioning

confidence: 99%

A new column collapse apparatus for the characterisation of the flowability of granular materials

2020

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Flowability of granular materials with industrial applications - An experimental approach

Cited by 4 publications

References 35 publications

An investigation of granular material movement due to instability post impinging upward fluid

An investigation of granular material movement due to instability post impinging upward fluid

Digital Image Correlation Based Internal Friction Characterization in Granular Materials

A new column collapse apparatus for the characterisation of the flowability of granular materials

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