Effect of the Hopper Angle of a Silo on the Vertical Stress at the Cylinder-to-Hopper Transition

Article

Influence of specific weight and wall friction coefficient on normal pressures in silos using the Finite Element Method

Rômulo Marçal Gandia et al.

Engenharia na Agricultura (2021)

Article Engineering, Chemical

Quantitative measurements of flow dynamics in 3D hoppers using MRI

Maral Mehdizad et al.

Summary: This study utilizes MRI to quantitatively measure the solid fraction and velocity within 3D hoppers, revealing discrepancies with existing mass flow assumptions.

POWDER TECHNOLOGY (2021)

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Article Engineering, Chemical

Evaluation of pressures in slender silos varying hopper angle and silo slenderness

Romulo Marcal Gandia et al.

Summary: In this paper, the authors report the results of pressure in a full-scale silo obtained from assays performed on a test station using a free-flowing product. The discharge flow is not influenced by silo slenderness, and maximum frictional pressures in the cylinder exceeded the standard peaks.

POWDER TECHNOLOGY (2021)

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Article Agricultural Engineering

EXPERIMENTAL PRESSURES EXERTED BY MAIZE IN SLENDER CYLINDRICAL SILO: COMPARISON WITH ISO 11697

Romulo M. Gandia et al.

Summary: This study evaluated normal and frictional pressures in a pilot-scale test station and found accommodation peaks only in a 30-degree hopper during filling. It was observed that normal pressures were higher for flat bottoms, while higher frictional pressures occurred in 30-degree hoppers. The results suggest that the coefficients used in the ISO standard are sufficient to promote safety in silo projects.

ENGENHARIA AGRICOLA (2021)

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Article Materials Science, Multidisciplinary

The role of the hopper angle in silos: experimental and CFD analysis

David Mendez et al.

Summary: In this study, experimental and numerical results of granular flows in silos and hoppers were reported. The numerical protocol was validated by comparing it with experimental data, showing good quantitative agreement. The study also analyzed the scaling properties of the flow profiles and the influence of hopper angles on the system.

GRANULAR MATTER (2021)

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Article Agricultural Engineering

Static and dynamic pressure measurements of maize grain in silos under different conditions

Romulo Marcal Gandia et al.

Summary: Silos are commonly used worldwide for storing products of high commercial value, but there are still many unanswered questions regarding storage and estimation of pressures. This paper describes the setup, calibration, and validation of a pilot-scale test facility for studying silo pressures. The results obtained from validation using maize demonstrate the accuracy of the pilot silo calibration and provide novel findings regarding pressure distribution in silos.

BIOSYSTEMS ENGINEERING (2021)

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Article Engineering, Chemical