Enhancement of mixing by rodlike polymers
We study the mixing of a passive scalar field dispersed in a solution of rodlike polymers in two dimensions, by means of numerical simulations of a rheological model for the polymer solution. The flow is driven by a parallel sinusoidal force (Kolmogorov flow). Although the Reynolds number is lower t...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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Springer
2018
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| _version_ | 1797083625085206528 |
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| author | Musacchio, S Cencini, M Plan, E Vincenzi, D |
| author_facet | Musacchio, S Cencini, M Plan, E Vincenzi, D |
| author_sort | Musacchio, S |
| collection | OXFORD |
| description | We study the mixing of a passive scalar field dispersed in a solution of rodlike polymers in two dimensions, by means of numerical simulations of a rheological model for the polymer solution. The flow is driven by a parallel sinusoidal force (Kolmogorov flow). Although the Reynolds number is lower than the critical value for inertial instabilities, the rotational dynamics of the polymers generates a chaotic flow similar to the so-called elastic-turbulence regime observed in extensible polymer solutions. The temporal decay of the variance of the scalar field and its gradients shows that this chaotic flow strongly enhances mixing. |
| first_indexed | 2024-03-07T01:44:03Z |
| format | Journal article |
| id | oxford-uuid:97d045d2-239d-48ba-851e-38ce3457501d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:44:03Z |
| publishDate | 2018 |
| publisher | Springer |
| record_format | dspace |
| spelling | oxford-uuid:97d045d2-239d-48ba-851e-38ce3457501d2022-03-27T00:02:49ZEnhancement of mixing by rodlike polymersJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:97d045d2-239d-48ba-851e-38ce3457501dEnglishSymplectic Elements at OxfordSpringer2018Musacchio, SCencini, MPlan, EVincenzi, DWe study the mixing of a passive scalar field dispersed in a solution of rodlike polymers in two dimensions, by means of numerical simulations of a rheological model for the polymer solution. The flow is driven by a parallel sinusoidal force (Kolmogorov flow). Although the Reynolds number is lower than the critical value for inertial instabilities, the rotational dynamics of the polymers generates a chaotic flow similar to the so-called elastic-turbulence regime observed in extensible polymer solutions. The temporal decay of the variance of the scalar field and its gradients shows that this chaotic flow strongly enhances mixing. |
| spellingShingle | Musacchio, S Cencini, M Plan, E Vincenzi, D Enhancement of mixing by rodlike polymers |
| title | Enhancement of mixing by rodlike polymers |
| title_full | Enhancement of mixing by rodlike polymers |
| title_fullStr | Enhancement of mixing by rodlike polymers |
| title_full_unstemmed | Enhancement of mixing by rodlike polymers |
| title_short | Enhancement of mixing by rodlike polymers |
| title_sort | enhancement of mixing by rodlike polymers |
| work_keys_str_mv | AT musacchios enhancementofmixingbyrodlikepolymers AT cencinim enhancementofmixingbyrodlikepolymers AT plane enhancementofmixingbyrodlikepolymers AT vincenzid enhancementofmixingbyrodlikepolymers |