The influence of flow pattern and hopper angle on static and dynamic pressures in slender silos
This paper focuses on the influence of flow pattern and hopper angle (β) on static and dynamic pressures in slender silos. The results were obtained using a test station developed by the authors, consisting of a silo (6 m high and 0.7 m internal diameter). Maize was used to generate the pressures. F...
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| Published in | Powder technology Vol. 427; p. 118756 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
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Elsevier B.V
01.09.2023
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| Abstract | This paper focuses on the influence of flow pattern and hopper angle (β) on static and dynamic pressures in slender silos. The results were obtained using a test station developed by the authors, consisting of a silo (6 m high and 0.7 m internal diameter). Maize was used to generate the pressures. Five different hopper angles were tested by filling, static phase followed by complete silo discharge. Results are reported for pressure and flow analyses, and show that hopper angle influences normal pressures on the silo wall; Silos with transition flow do not have a concrete pattern of distribution of thrusts; pressure values are proportional to the variation of the hopper angle; and internal shear zones vary according to hopper angle, completely modifying the behaviour of static and dynamic pressures. Friction pressure and lateral pressure ratio values exceeded those calculated by the Eurocode 1, part 4.
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•Static and dynamic pressures were studied.•Overpressure values are directly proportional to the decrease in hopper angle.•K values at discharge exceeded that calculated by Eurocode 1, part 4.•Friction pressures in the cylinder exceeded those calculated by Eurocode 1, part 4.•The formation of stress arcs is proportional to the decrease in hopper angle (β). |
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| AbstractList | This paper focuses on the influence of flow pattern and hopper angle (β) on static and dynamic pressures in slender silos. The results were obtained using a test station developed by the authors, consisting of a silo (6 m high and 0.7 m internal diameter). Maize was used to generate the pressures. Five different hopper angles were tested by filling, static phase followed by complete silo discharge. Results are reported for pressure and flow analyses, and show that hopper angle influences normal pressures on the silo wall; Silos with transition flow do not have a concrete pattern of distribution of thrusts; pressure values are proportional to the variation of the hopper angle; and internal shear zones vary according to hopper angle, completely modifying the behaviour of static and dynamic pressures. Friction pressure and lateral pressure ratio values exceeded those calculated by the Eurocode 1, part 4.
[Display omitted]
•Static and dynamic pressures were studied.•Overpressure values are directly proportional to the decrease in hopper angle.•K values at discharge exceeded that calculated by Eurocode 1, part 4.•Friction pressures in the cylinder exceeded those calculated by Eurocode 1, part 4.•The formation of stress arcs is proportional to the decrease in hopper angle (β). This paper focuses on the influence of flow pattern and hopper angle (β) on static and dynamic pressures in slender silos. The results were obtained using a test station developed by the authors, consisting of a silo (6 m high and 0.7 m internal diameter). Maize was used to generate the pressures. Five different hopper angles were tested by filling, static phase followed by complete silo discharge. Results are reported for pressure and flow analyses, and show that hopper angle influences normal pressures on the silo wall; Silos with transition flow do not have a concrete pattern of distribution of thrusts; pressure values are proportional to the variation of the hopper angle; and internal shear zones vary according to hopper angle, completely modifying the behaviour of static and dynamic pressures. Friction pressure and lateral pressure ratio values exceeded those calculated by the Eurocode 1, part 4. |
| ArticleNumber | 118756 |
| Author | de Paula, Wisner Coimbra Rodriguez, Pedro José Aguado Gandia, Rômulo Marçal Gomes, Francisco Carlos |
| Author_xml | – sequence: 1 givenname: Rômulo Marçal surname: Gandia fullname: Gandia, Rômulo Marçal email: romagandia@gmail.com, romulomarcalg@estudante.ufla.br organization: Federal University of Lavras, Agricultural Engineering Department, Brazil – sequence: 2 givenname: Francisco Carlos surname: Gomes fullname: Gomes, Francisco Carlos organization: Federal University of Lavras, Agricultural Engineering Department, Brazil – sequence: 3 givenname: Wisner Coimbra surname: de Paula fullname: de Paula, Wisner Coimbra organization: Federal University of Lavras, Agricultural Engineering Department, Brazil – sequence: 4 givenname: Pedro José Aguado surname: Rodriguez fullname: Rodriguez, Pedro José Aguado organization: University of León, Department of Engineering and Agricultural Sciences, Spain |
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| CitedBy_id | crossref_primary_10_3390_ma17225476 crossref_primary_10_1038_s41598_024_72032_8 crossref_primary_10_1016_j_powtec_2025_120820 crossref_primary_10_1016_j_measurement_2025_117335 crossref_primary_10_1016_j_powtec_2025_120686 crossref_primary_10_1016_j_powtec_2024_120234 |
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| Keywords | Pressures in silos Free-flowing product Flow pattern Slender silo Friction and normal pressures |
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| SubjectTerms | corn Flow pattern Free-flowing product friction Friction and normal pressures Pressures in silos silos Slender silo technology |
| Title | The influence of flow pattern and hopper angle on static and dynamic pressures in slender silos |
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