Effects of interparticle attractions on colloidal sedimentation.
We use a mesoscopic simulation technique to study the effect of short-ranged interparticle attractions on the steady-state sedimentation of colloidal suspensions. Attractions increase the average sedimentation velocity v(s) compared to the pure hard-sphere case, and for strong enough attractions, a...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1797087693522337792 |
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| author | Moncho-Jordá, A Louis, A Padding, J |
| author_facet | Moncho-Jordá, A Louis, A Padding, J |
| author_sort | Moncho-Jordá, A |
| collection | OXFORD |
| description | We use a mesoscopic simulation technique to study the effect of short-ranged interparticle attractions on the steady-state sedimentation of colloidal suspensions. Attractions increase the average sedimentation velocity v(s) compared to the pure hard-sphere case, and for strong enough attractions, a nonmonotonic dependence on the packing fraction phi with a maximum velocity at intermediate phi is observed. Attractions also strongly enhance hydrodynamic velocity fluctuations, which show a pronounced maximum size as a function of phi. These phenomena arise from a complex interplay between nonequilibrium hydrodynamic effects and the thermodynamics of transient cluster formation. |
| first_indexed | 2024-03-07T02:39:19Z |
| format | Journal article |
| id | oxford-uuid:a9e2877d-c9e1-44d5-9914-1a34f41ef3b7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:39:19Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:a9e2877d-c9e1-44d5-9914-1a34f41ef3b72022-03-27T03:11:23ZEffects of interparticle attractions on colloidal sedimentation.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a9e2877d-c9e1-44d5-9914-1a34f41ef3b7EnglishSymplectic Elements at Oxford2010Moncho-Jordá, ALouis, APadding, JWe use a mesoscopic simulation technique to study the effect of short-ranged interparticle attractions on the steady-state sedimentation of colloidal suspensions. Attractions increase the average sedimentation velocity v(s) compared to the pure hard-sphere case, and for strong enough attractions, a nonmonotonic dependence on the packing fraction phi with a maximum velocity at intermediate phi is observed. Attractions also strongly enhance hydrodynamic velocity fluctuations, which show a pronounced maximum size as a function of phi. These phenomena arise from a complex interplay between nonequilibrium hydrodynamic effects and the thermodynamics of transient cluster formation. |
| spellingShingle | Moncho-Jordá, A Louis, A Padding, J Effects of interparticle attractions on colloidal sedimentation. |
| title | Effects of interparticle attractions on colloidal sedimentation. |
| title_full | Effects of interparticle attractions on colloidal sedimentation. |
| title_fullStr | Effects of interparticle attractions on colloidal sedimentation. |
| title_full_unstemmed | Effects of interparticle attractions on colloidal sedimentation. |
| title_short | Effects of interparticle attractions on colloidal sedimentation. |
| title_sort | effects of interparticle attractions on colloidal sedimentation |
| work_keys_str_mv | AT monchojordaa effectsofinterparticleattractionsoncolloidalsedimentation AT louisa effectsofinterparticleattractionsoncolloidalsedimentation AT paddingj effectsofinterparticleattractionsoncolloidalsedimentation |