Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions
Understanding the transport of driven nano- and micro-particles in complex fluids is of relevance for many biological and technological applications. Here we perform hydrodynamic multiparticle collision dynamics simulations of spherical and elongated particles driven through polymeric fluids contain...
| Main Authors: | , |
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| Format: | Journal article |
| Language: | English |
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IOP Publishing
2019
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| _version_ | 1797085939802046464 |
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| author | Zöttl, A Yeomans, JM |
| author_facet | Zöttl, A Yeomans, JM |
| author_sort | Zöttl, A |
| collection | OXFORD |
| description | Understanding the transport of driven nano- and micro-particles in complex fluids is of relevance for many biological and technological applications. Here we perform hydrodynamic multiparticle collision dynamics simulations of spherical and elongated particles driven through polymeric fluids containing different concentrations of polymers. We determine the mean particle velocities which are larger than expected from Stokes law for all particle shapes and polymer densities. Furthermore we measure the fluid flow fields and local polymer density and polymer conformation around the particles. We find that polymer-depleted regions close to the particles are responsible for an apparent tangential slip velocity which accounts for the measured flow fields and transport velocities. A simple two-layer fluid model gives a good match to the simulation results. |
| first_indexed | 2024-03-07T02:14:58Z |
| format | Journal article |
| id | oxford-uuid:a1e7e363-645a-418a-93bb-0563eb30f70a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:14:58Z |
| publishDate | 2019 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | oxford-uuid:a1e7e363-645a-418a-93bb-0563eb30f70a2022-03-27T02:16:32ZDriven spheres, ellipsoids and rods in explicitly modeled polymer solutionsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a1e7e363-645a-418a-93bb-0563eb30f70aEnglishSymplectic Elements at OxfordIOP Publishing2019Zöttl, AYeomans, JMUnderstanding the transport of driven nano- and micro-particles in complex fluids is of relevance for many biological and technological applications. Here we perform hydrodynamic multiparticle collision dynamics simulations of spherical and elongated particles driven through polymeric fluids containing different concentrations of polymers. We determine the mean particle velocities which are larger than expected from Stokes law for all particle shapes and polymer densities. Furthermore we measure the fluid flow fields and local polymer density and polymer conformation around the particles. We find that polymer-depleted regions close to the particles are responsible for an apparent tangential slip velocity which accounts for the measured flow fields and transport velocities. A simple two-layer fluid model gives a good match to the simulation results. |
| spellingShingle | Zöttl, A Yeomans, JM Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title | Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title_full | Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title_fullStr | Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title_full_unstemmed | Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title_short | Driven spheres, ellipsoids and rods in explicitly modeled polymer solutions |
| title_sort | driven spheres ellipsoids and rods in explicitly modeled polymer solutions |
| work_keys_str_mv | AT zottla drivenspheresellipsoidsandrodsinexplicitlymodeledpolymersolutions AT yeomansjm drivenspheresellipsoidsandrodsinexplicitlymodeledpolymersolutions |