Phoresis in turbulent flows
Phoresis, the drift of particles induced by scalar gradients in a flow, can result in an effective compressibility, bringing together or repelling particles from each other. Here, we ask whether this effect can affect the transport of particles in a turbulent flow. To this end, we study how the disp...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2017-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aa99bd |
| _version_ | 1797750710615408640 |
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| author | Vishwanath Shukla Romain Volk Mickaël Bourgoin Alain Pumir |
| author_facet | Vishwanath Shukla Romain Volk Mickaël Bourgoin Alain Pumir |
| author_sort | Vishwanath Shukla |
| collection | DOAJ |
| description | Phoresis, the drift of particles induced by scalar gradients in a flow, can result in an effective compressibility, bringing together or repelling particles from each other. Here, we ask whether this effect can affect the transport of particles in a turbulent flow. To this end, we study how the dispersion of a cloud of phoretic particles is modified when injected in the flow, together with a blob of scalar, whose effect is to transiently bring particles together, or push them away from the center of the blob. The resulting phoretic effect can be quantified by a single dimensionless number. Phenomenological considerations lead to simple predictions for the mean separation between particles, which are consistent with results of direct numerical simulations. Using the numerical results presented here, as well as those from previous studies, we discuss quantitatively the experimental consequences of this work and the possible impact of such phoretic mechanisms in natural systems. |
| first_indexed | 2024-03-12T16:37:50Z |
| format | Article |
| id | doaj.art-c2874b9e9f1f419e8e126c87fae7e887 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:37:50Z |
| publishDate | 2017-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-c2874b9e9f1f419e8e126c87fae7e8872023-08-08T14:50:00ZengIOP PublishingNew Journal of Physics1367-26302017-01-01191212303010.1088/1367-2630/aa99bdPhoresis in turbulent flowsVishwanath Shukla0Romain Volk1Mickaël Bourgoin2Alain Pumir3Univ Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon, France; Service de Physique de l’Etat Condensé, Université Paris-Saclay , CEA Saclay, F-91191 Gif-sur-Yvette, FranceUniv Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon, FranceUniv Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon, FranceUniv Lyon, ENS de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, F-69342 Lyon, FrancePhoresis, the drift of particles induced by scalar gradients in a flow, can result in an effective compressibility, bringing together or repelling particles from each other. Here, we ask whether this effect can affect the transport of particles in a turbulent flow. To this end, we study how the dispersion of a cloud of phoretic particles is modified when injected in the flow, together with a blob of scalar, whose effect is to transiently bring particles together, or push them away from the center of the blob. The resulting phoretic effect can be quantified by a single dimensionless number. Phenomenological considerations lead to simple predictions for the mean separation between particles, which are consistent with results of direct numerical simulations. Using the numerical results presented here, as well as those from previous studies, we discuss quantitatively the experimental consequences of this work and the possible impact of such phoretic mechanisms in natural systems.https://doi.org/10.1088/1367-2630/aa99bdturbulencephoresisdirect numerical simulationsturbulent transport |
| spellingShingle | Vishwanath Shukla Romain Volk Mickaël Bourgoin Alain Pumir Phoresis in turbulent flows New Journal of Physics turbulence phoresis direct numerical simulations turbulent transport |
| title | Phoresis in turbulent flows |
| title_full | Phoresis in turbulent flows |
| title_fullStr | Phoresis in turbulent flows |
| title_full_unstemmed | Phoresis in turbulent flows |
| title_short | Phoresis in turbulent flows |
| title_sort | phoresis in turbulent flows |
| topic | turbulence phoresis direct numerical simulations turbulent transport |
| url | https://doi.org/10.1088/1367-2630/aa99bd |
| work_keys_str_mv | AT vishwanathshukla phoresisinturbulentflows AT romainvolk phoresisinturbulentflows AT mickaelbourgoin phoresisinturbulentflows AT alainpumir phoresisinturbulentflows |