Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling
A recent granular rheology based on an implicit "granular fluidity" field has been shown to quantitatively predict many nonlocal phenomena. However, the physical nature of the field has not been identified. Here, the granular fluidity is found to be a kinematic variable given by the veloci...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
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American Physical Society (APS)
2018
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| Online Access: | http://hdl.handle.net/1721.1/117654 https://orcid.org/0000-0002-3856-6902 https://orcid.org/0000-0002-5154-9787 |
| _version_ | 1826210795573215232 |
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| author | Zhang, Qiong Kamrin, Ken Kamrin, Kenneth N |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Zhang, Qiong Kamrin, Ken Kamrin, Kenneth N |
| author_sort | Zhang, Qiong |
| collection | MIT |
| description | A recent granular rheology based on an implicit "granular fluidity" field has been shown to quantitatively predict many nonlocal phenomena. However, the physical nature of the field has not been identified. Here, the granular fluidity is found to be a kinematic variable given by the velocity fluctuation and packing fraction. This is verified with many discrete element simulations, which show that the operational fluidity definition, solutions of the fluidity model, and the proposed microscopic formula all agree. Kinetic theoretical and Eyring-like explanations shed insight into the obtained form. |
| first_indexed | 2024-09-23T14:55:34Z |
| format | Article |
| id | mit-1721.1/117654 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T14:55:34Z |
| publishDate | 2018 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1176542022-10-01T23:24:45Z Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling Zhang, Qiong Kamrin, Ken Kamrin, Kenneth N Massachusetts Institute of Technology. Department of Mechanical Engineering Zhang, Qiong Kamrin, Kenneth N A recent granular rheology based on an implicit "granular fluidity" field has been shown to quantitatively predict many nonlocal phenomena. However, the physical nature of the field has not been identified. Here, the granular fluidity is found to be a kinematic variable given by the velocity fluctuation and packing fraction. This is verified with many discrete element simulations, which show that the operational fluidity definition, solutions of the fluidity model, and the proposed microscopic formula all agree. Kinetic theoretical and Eyring-like explanations shed insight into the obtained form. Natioanal Science Foundation (U.S.) (Grant CBET-1253228) 2018-09-06T18:33:16Z 2018-09-06T18:33:16Z 2017-01 2016-11 2018-08-29T14:09:02Z Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/117654 Zhang, Qiong, and Ken Kamrin. “Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling.” Physical Review Letters 118, 5 (January 2017): 058001 © 2017 American Physical Society https://orcid.org/0000-0002-3856-6902 https://orcid.org/0000-0002-5154-9787 http://dx.doi.org/10.1103/PHYSREVLETT.118.058001 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Zhang, Qiong Kamrin, Ken Kamrin, Kenneth N Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title | Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title_full | Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title_fullStr | Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title_full_unstemmed | Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title_short | Microscopic Description of the Granular Fluidity Field in Nonlocal Flow Modeling |
| title_sort | microscopic description of the granular fluidity field in nonlocal flow modeling |
| url | http://hdl.handle.net/1721.1/117654 https://orcid.org/0000-0002-3856-6902 https://orcid.org/0000-0002-5154-9787 |
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