Relaxation processes after instantaneous shear rate reversal in a dense granular flow
A numerical model of granular material at different packing fractions and under steady shear is submitted to a sudden shear reversal. We monitor consequences of the strong density and shear rate spatiotemporal heterogeneities, on the constitutive relations. We show that the dynamics can be decompose...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201714003010 |
| _version_ | 1819123895097098240 |
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| author | Rojas Eduardo Soto Rodrigo Clement Eric Trulsson Martin Andreotti Bruno |
| author_facet | Rojas Eduardo Soto Rodrigo Clement Eric Trulsson Martin Andreotti Bruno |
| author_sort | Rojas Eduardo |
| collection | DOAJ |
| description | A numerical model of granular material at different packing fractions and under steady shear is submitted to a sudden shear reversal. We monitor consequences of the strong density and shear rate spatiotemporal heterogeneities, on the constitutive relations. We show that the dynamics can be decomposed into two subsequent regimes spanning a time scale inversely proportional to the shear rate. In the first regime, a nonlocal constitutive relation is satisfied, hence accounting for the spatial heterogeneity of the fluidity parameter. However at later time, we find that the local μ(I) constitutive relation can be applied, in spite of the fact that the fluidity parameter remains heterogeneous. |
| first_indexed | 2024-12-22T07:15:37Z |
| format | Article |
| id | doaj.art-94447b044ca8478099149d82415164e9 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-22T07:15:37Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-94447b044ca8478099149d82415164e92022-12-21T18:34:24ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011400301010.1051/epjconf/201714003010epjconf161907Relaxation processes after instantaneous shear rate reversal in a dense granular flowRojas Eduardo0Soto Rodrigo1Clement Eric2Trulsson Martin3Andreotti Bruno4Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de AntofagastaDepartamento de Física, Facultad de Ciencias Físicas y Matemáticas, Universidad de ChileÉcole Supérieure de Physique et de Chimie Industrielles (ESPCI)École Supérieure de Physique et de Chimie Industrielles (ESPCI)École Supérieure de Physique et de Chimie Industrielles (ESPCI)A numerical model of granular material at different packing fractions and under steady shear is submitted to a sudden shear reversal. We monitor consequences of the strong density and shear rate spatiotemporal heterogeneities, on the constitutive relations. We show that the dynamics can be decomposed into two subsequent regimes spanning a time scale inversely proportional to the shear rate. In the first regime, a nonlocal constitutive relation is satisfied, hence accounting for the spatial heterogeneity of the fluidity parameter. However at later time, we find that the local μ(I) constitutive relation can be applied, in spite of the fact that the fluidity parameter remains heterogeneous.https://doi.org/10.1051/epjconf/201714003010 |
| spellingShingle | Rojas Eduardo Soto Rodrigo Clement Eric Trulsson Martin Andreotti Bruno Relaxation processes after instantaneous shear rate reversal in a dense granular flow EPJ Web of Conferences |
| title | Relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| title_full | Relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| title_fullStr | Relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| title_full_unstemmed | Relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| title_short | Relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| title_sort | relaxation processes after instantaneous shear rate reversal in a dense granular flow |
| url | https://doi.org/10.1051/epjconf/201714003010 |
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