Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media
A recently proposed nonlocal rheology for dense granular flow, based on the concept of nonlocal granular fluidity, has demonstrated predictive capabilities in multiple geometries. This work is concerned with determining how the parameters of this continuum model arise from the properties of the grai...
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| Format: | Article |
| Language: | English |
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Springer International Publishing
2016
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| Online Access: | http://hdl.handle.net/1721.1/103322 https://orcid.org/0000-0002-5154-9787 |
| _version_ | 1826214502590316544 |
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| author | Koval, Georg Kamrin, Kenneth N. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Koval, Georg Kamrin, Kenneth N. |
| author_sort | Koval, Georg |
| collection | MIT |
| description | A recently proposed nonlocal rheology for dense granular flow, based on the concept of nonlocal granular fluidity, has demonstrated predictive capabilities in multiple geometries. This work is concerned with determining how the parameters of this continuum model arise from the properties of the grains themselves. We perform a controlled study investigating how the surface friction of the grains influences the continuum parameters, with a focus on how the nonlocal amplitude, the model’s one new parameter, is affected. This is achieved comparing two-dimensional discrete-element simulations of flowing disks to numerical solutions of the model in planar shear and several annular shear geometries. A multi-step calibration scheme for the continuum parameter extraction is developed and implemented. Results indicate the nonlocal amplitude varies less than an order of magnitude over a wide range of surface frictions, with a slight tendency to increase as surface friction decreases, particularly in a regime of small surface friction. Our data also show that the stress and flow-rate variables deviate little from a local relationship as surface friction vanishes, which corroborates certain existing experimental findings. |
| first_indexed | 2024-09-23T16:06:27Z |
| format | Article |
| id | mit-1721.1/103322 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:06:27Z |
| publishDate | 2016 |
| publisher | Springer International Publishing |
| record_format | dspace |
| spelling | mit-1721.1/1033222022-10-02T06:24:37Z Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media Koval, Georg Kamrin, Kenneth N. Massachusetts Institute of Technology. Department of Mechanical Engineering Kamrin, Kenneth N. A recently proposed nonlocal rheology for dense granular flow, based on the concept of nonlocal granular fluidity, has demonstrated predictive capabilities in multiple geometries. This work is concerned with determining how the parameters of this continuum model arise from the properties of the grains themselves. We perform a controlled study investigating how the surface friction of the grains influences the continuum parameters, with a focus on how the nonlocal amplitude, the model’s one new parameter, is affected. This is achieved comparing two-dimensional discrete-element simulations of flowing disks to numerical solutions of the model in planar shear and several annular shear geometries. A multi-step calibration scheme for the continuum parameter extraction is developed and implemented. Results indicate the nonlocal amplitude varies less than an order of magnitude over a wide range of surface frictions, with a slight tendency to increase as surface friction decreases, particularly in a regime of small surface friction. Our data also show that the stress and flow-rate variables deviate little from a local relationship as surface friction vanishes, which corroborates certain existing experimental findings. 2016-06-24T16:58:06Z 2016-06-24T16:58:06Z 2014-05 2014-01 2016-05-23T12:12:55Z Article http://purl.org/eprint/type/JournalArticle 2196-4378 2196-4386 http://hdl.handle.net/1721.1/103322 Kamrin, Ken, and Georg Koval. “Effect of Particle Surface Friction on Nonlocal Constitutive Behavior of Flowing Granular Media.” Computational Particle Mechanics 1, no. 2 (May 2, 2014): 169–176. https://orcid.org/0000-0002-5154-9787 en http://dx.doi.org/10.1007/s40571-014-0018-3 Computational Particle Mechanics Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ Springer International Publishing Switzerland application/pdf Springer International Publishing Springer International Publishing |
| spellingShingle | Koval, Georg Kamrin, Kenneth N. Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title | Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title_full | Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title_fullStr | Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title_full_unstemmed | Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title_short | Effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| title_sort | effect of particle surface friction on nonlocal constitutive behavior of flowing granular media |
| url | http://hdl.handle.net/1721.1/103322 https://orcid.org/0000-0002-5154-9787 |
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