Localization dynamics of fluids in random confinement.
The dynamics of two-dimensional fluids confined within a random matrix of obstacles is investigated using both colloidal model experiments and molecular dynamics simulations. By varying fluid and matrix area fractions in the experiment, we find delocalized tracer particle dynamics at small matrix ar...
| Prif Awduron: | , , , , |
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| Fformat: | Journal article |
| Iaith: | English |
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American Physical Society
2013
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| _version_ | 1826274906131660800 |
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| author | Skinner, T Schnyder, S Aarts, D Horbach, J Dullens, R |
| author_facet | Skinner, T Schnyder, S Aarts, D Horbach, J Dullens, R |
| author_sort | Skinner, T |
| collection | OXFORD |
| description | The dynamics of two-dimensional fluids confined within a random matrix of obstacles is investigated using both colloidal model experiments and molecular dynamics simulations. By varying fluid and matrix area fractions in the experiment, we find delocalized tracer particle dynamics at small matrix area fractions and localized motion of the tracers at high matrix area fractions. In the delocalized region, the dynamics is subdiffusive at intermediate times, and diffusive at long times, while in the localized regime, trapping in finite pockets of the matrix is observed. These observations are found to agree with the simulation of an ideal gas confined in a weakly correlated matrix. Our results show that Lorentz gas systems with soft interactions are exhibiting a smoothening of the critical dynamics and consequently a rounded delocalization-to-localization transition. |
| first_indexed | 2024-03-06T22:50:36Z |
| format | Journal article |
| id | oxford-uuid:5ea74f48-dd2c-4c63-b069-ac72f4aad55f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:50:36Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:5ea74f48-dd2c-4c63-b069-ac72f4aad55f2022-03-26T17:41:58ZLocalization dynamics of fluids in random confinement.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:5ea74f48-dd2c-4c63-b069-ac72f4aad55fEnglishSymplectic Elements at OxfordAmerican Physical Society2013Skinner, TSchnyder, SAarts, DHorbach, JDullens, RThe dynamics of two-dimensional fluids confined within a random matrix of obstacles is investigated using both colloidal model experiments and molecular dynamics simulations. By varying fluid and matrix area fractions in the experiment, we find delocalized tracer particle dynamics at small matrix area fractions and localized motion of the tracers at high matrix area fractions. In the delocalized region, the dynamics is subdiffusive at intermediate times, and diffusive at long times, while in the localized regime, trapping in finite pockets of the matrix is observed. These observations are found to agree with the simulation of an ideal gas confined in a weakly correlated matrix. Our results show that Lorentz gas systems with soft interactions are exhibiting a smoothening of the critical dynamics and consequently a rounded delocalization-to-localization transition. |
| spellingShingle | Skinner, T Schnyder, S Aarts, D Horbach, J Dullens, R Localization dynamics of fluids in random confinement. |
| title | Localization dynamics of fluids in random confinement. |
| title_full | Localization dynamics of fluids in random confinement. |
| title_fullStr | Localization dynamics of fluids in random confinement. |
| title_full_unstemmed | Localization dynamics of fluids in random confinement. |
| title_short | Localization dynamics of fluids in random confinement. |
| title_sort | localization dynamics of fluids in random confinement |
| work_keys_str_mv | AT skinnert localizationdynamicsoffluidsinrandomconfinement AT schnyders localizationdynamicsoffluidsinrandomconfinement AT aartsd localizationdynamicsoffluidsinrandomconfinement AT horbachj localizationdynamicsoffluidsinrandomconfinement AT dullensr localizationdynamicsoffluidsinrandomconfinement |