Impact of the heap shape formation on the local vertical force profile of ensiled granular materials
| Autor: | Ruiz Thierry, Mabille Frédéric, Duri Agnès |
|---|---|
| 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), ANS BLANC « PowFlow », 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, Ruiz, Thierry |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
structure granulaire
Materials science Point source General Chemical Engineering granular structure 02 engineering and technology Kinetic energy Granular material Wheat-based powders 020401 chemical engineering Vertical force profile 0204 chemical engineering comportement mécanique Heap (data structure) Ensiled granular medium Heap free surface Mechanics Intergranular corrosion 021001 nanoscience & nanotechnology poudre alimentaire Stress field Autre (Matière condensée) Free surface Vertical force [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] 0210 nano-technology |
| Zdroj: | Powder Technology Powder Technology, Elsevier, 2018, 338, pp.993-1000. ⟨10.1016/j.powtec.2018.06.046⟩ Powder Technology (338), 993-1000. (2018) |
| ISSN: | 0032-5910 |
| DOI: | 10.1016/j.powtec.2018.06.046⟩ |
| Popis: | Il s'agit d'une publication soumise; The free surface, which results from the filling of a container by a dry granu- lar material, takes the shape of a heap. This shape is induced by the particle properties like their size, their friction, their restitution coefficient but also by their kinetic energy induced by the filling conditions. The stabilization of the intergranular contact network inside the heap leads to the formation of a spe- cific local stress field. For five wheat-based powders of same origin but with contrasted properties, beds are formed in a 2D semi-confined cell using a point source. Captures of the bed free surface are realized from pictures taken at different filling states. The local vertical force is measured in the center of the cell at different depths. This work highlights a correlation between the local vertical force profile and the shape of the heap during the filling. Two modes of force distribution can be distinguished and classified according to a parameter of uniformity. These distinctions are linked to the different shapes of the heap, quasi-layering or dune. Our experimental study demonstrates that the history of the powder filling directly impacts on the resulting local force profile. |
| Databáze: | OpenAIRE |
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