Vertical slow drag of an intruder in a laterally confined granular medium
| Autor: | Frédéric Mabille, Agnès Duri, Sandra Mandato, Bernard Cuq, Thierry Ruiz |
|---|---|
| Přispěvatelé: | Ingénierie des Agro-polymères et Technologies Émergentes (UMR IATE), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Duri, Agnès, Mandato, Sandra, Mabille, Frederic, Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut National de la Recherche Agronomique (INRA) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
QC1-999
Compaction produit granulaire 01 natural sciences rheological behaviour shear resistance 010305 fluids & plasmas Physics::Fluid Dynamics semolina déplacement 0103 physical sciences vélocimétrie par images de particules (PIV) Statistical physics 010306 general physics semoule Physics Mechanics Shear (geology) Particle image velocimetry Autre (Matière condensée) Drag Free surface [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] Powder bed résistance au cisaillement Vector field comportement rhéologique moving Geology Dimensionless quantity |
| Zdroj: | 8. International Conference on Micromechanics of Granular Media (Powders & Grains) 8. International Conference on Micromechanics of Granular Media (Powders & Grains), Jul 2017, Montpellier, France. EDP Sciences, EPJ Web of Conferences, 140, 2017, EPJ Web of Conferences. ⟨10.1051/epjconf/201714003083⟩ 8. International Conference on Micromechanics of Granular Media (Powders & Grains), Jul 2017, Montpellier, France. ⟨10.1051/epjconf/201714003083⟩ EPJ Web of Conferences, Vol 140, p 03083 (2017) (140)2017; 8. International Conference on Micromechanics of Granular Media (Powders & Grains), Montpellier, FRA, 2017-07-03-2017-07-07 8. International Conference on Micromechanics of Granular Media (Powders & Grains), Jul 2017, Montpellier, France. ⟨10.1051/epjconf/201714003083 ⟩ |
| Popis: | The study of force transmission and typologies of motions in a powder bed under low shear solicitation constitutes a challenging issue to achieve a monitoring of most of processes. This work relies on the characterisation of particle mobility in the neighbourhood of a moving intruder in ascendant vertical motion. Vertical force measurements and Particle Image Velocimetry (PIV) technique are used to identify different typologies of particle motions (compaction, loading and rupture of the chain forces, lateral collapsing, avalanches…) of a granular bed ensiled in a semi-confined cell and with a free surface on its top. Force fluctuations during the blade displacement are highlighted and correlated with the dimensionless blade speed but also with the force profile in the static state. The velocity field analysis allows quantifying the shear-banding characteristics corresponding to the blade influence on grain displacements and the impact of the intruder in the motion direction. This signal contains periodical fluctuations which are correlated with the vertical force fluctuations in a specific zone of the granular bed. |
| Databáze: | OpenAIRE |
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