Active nematic materials with substrate friction
Active turbulence in dense active systems is characterized by high vorticity on a length scale that is large compared to that of individual entities. We describe the properties of active turbulence as momentum propagation is screened by frictional damping. As friction is increased, the spacing betwe...
| Main Authors: | , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2014
|
| _version_ | 1797101116959227904 |
|---|---|
| author | Thampi, S Golestanian, R Yeomans, J |
| author_facet | Thampi, S Golestanian, R Yeomans, J |
| author_sort | Thampi, S |
| collection | OXFORD |
| description | Active turbulence in dense active systems is characterized by high vorticity on a length scale that is large compared to that of individual entities. We describe the properties of active turbulence as momentum propagation is screened by frictional damping. As friction is increased, the spacing between the walls in the nematic director field decreases as a consequence of the more rapid velocity decays. This leads to, first, a regime with more walls and an increased number of topological defects, and then to a jammed state in which the walls deliminate bands of opposing flow, analogous to the shear bands observed in passive complex fluids. |
| first_indexed | 2024-03-07T05:47:18Z |
| format | Journal article |
| id | oxford-uuid:e7a4d2e1-a179-4f69-9350-d01fdca04d3e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:47:18Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:e7a4d2e1-a179-4f69-9350-d01fdca04d3e2022-03-27T10:40:23ZActive nematic materials with substrate frictionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:e7a4d2e1-a179-4f69-9350-d01fdca04d3eEnglishSymplectic Elements at OxfordAmerican Physical Society2014Thampi, SGolestanian, RYeomans, JActive turbulence in dense active systems is characterized by high vorticity on a length scale that is large compared to that of individual entities. We describe the properties of active turbulence as momentum propagation is screened by frictional damping. As friction is increased, the spacing between the walls in the nematic director field decreases as a consequence of the more rapid velocity decays. This leads to, first, a regime with more walls and an increased number of topological defects, and then to a jammed state in which the walls deliminate bands of opposing flow, analogous to the shear bands observed in passive complex fluids. |
| spellingShingle | Thampi, S Golestanian, R Yeomans, J Active nematic materials with substrate friction |
| title | Active nematic materials with substrate friction |
| title_full | Active nematic materials with substrate friction |
| title_fullStr | Active nematic materials with substrate friction |
| title_full_unstemmed | Active nematic materials with substrate friction |
| title_short | Active nematic materials with substrate friction |
| title_sort | active nematic materials with substrate friction |
| work_keys_str_mv | AT thampis activenematicmaterialswithsubstratefriction AT golestanianr activenematicmaterialswithsubstratefriction AT yeomansj activenematicmaterialswithsubstratefriction |