A New Methodology for Measuring the Flowability of Granular Materials

Venkatesh, R.; Bek, Marko; Voloshin, Arkady; Emri, Igor

doi:10.1016/j.matpr.2018.08.137

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…Numerous methods are used to measure flowability, such as the granular friction analyzer [44,45], hall flow meter [46], and angle of repose [47], etc. For the purpose of this study, flowability was measured by determining the angle of repose (Figure 1).…”

Section: Flowabilitymentioning

confidence: 99%

Experimental Evaluation of a Granular Damping Element

Avdić,

Nagode,

Klemenc

et al. 2024

Polymers

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Due to their advantages—longer internal force delay compared to bulk materials, resistance to harsh conditions, damping of a wide frequency spectrum, insensitivity to ambient temperature, high reliability and low cost—granular materials are seen as an opportunity for the development of high-performance, lightweight vibration-damping elements (particle dampers). The performance of particle dampers is affected by numerous parameters, such as the base material, the size of the granules, the flowability, the initial prestress, etc. In this work, a series of experiments were performed on specimens with different combinations of influencing parameters. Energy-based design parameters were used to describe the overall vibration-damping performance. The results provided information for a deeper understanding of the dissipation mechanisms and their mutual correlation, as well as the influence of different parameters (base material, granule size and flowability) on the overall damping performance. A comparison of the performance of particle dampers with carbon steel and polyoxymethylene granules and conventional rubber dampers is given. The results show that the damping performance of particle dampers can be up to 4 times higher compared to conventional bulk material-based rubber dampers, even though rubber as a material has better vibration-damping properties than the two granular materials in particle dampers. However, when additional design features such as mass and stiffness are introduced, the results show that the overall performance of particle dampers with polyoxymethylene granules can be up to 3 times higher compared to particle dampers with carbon steel granules and conventional bulk material-based rubber dampers.

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Section: Flowabilitymentioning

confidence: 99%

Experimental Evaluation of a Granular Damping Element

Avdić,

Nagode,

Klemenc

et al. 2024

Polymers

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“…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]. Although widely used, a complete description of granular systems and property dynamics is still largely not yet explained.…”

Section: Introductionmentioning

confidence: 99%

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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A New Methodology for Measuring the Flowability of Granular Materials

Cited by 2 publications

References 6 publications

Experimental Evaluation of a Granular Damping Element

Experimental Evaluation of a Granular Damping Element

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

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