Band gap formation in internal gravity waves propagating in periodically stratified fluids
In the ocean, the interplay between heat diffusion and salt diffusion can drive double diffusive instability and lead to the formation of spatially periodic density profiles. These periodic structures, called thermohaline staircases, can persist over large regions and have also been suggested to exi...
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ftccsdartic:oai:HAL:hal-04315402v1 2023-12-31T10:03:57+01:00 Band gap formation in internal gravity waves propagating in periodically stratified fluids Atis, Severine Ghaemsaidi, Sasan, J Fruchart, Michel Institut Pprime (PPRIME) Université de Poitiers-École Nationale Supérieure de Mécanique et d’Aérotechnique Poitiers (ISAE-ENSMA )-Centre National de la Recherche Scientifique (CNRS) University of Chicago Department of Mechanical Engineering Massachusetts Institute of Technology (MIT-MECHE) Massachusetts Institute of Technology (MIT) Gulliver (UMR 7083) Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Las Vegas, United States 2023-03-05 https://hal.science/hal-04315402 en eng HAL CCSD hal-04315402 https://hal.science/hal-04315402 Bulletin of the American Physical Society https://hal.science/hal-04315402 Bulletin of the American Physical Society, Mar 2023, Las Vegas, United States [PHYS]Physics [physics] [SDE]Environmental Sciences info:eu-repo/semantics/conferenceObject Conference papers 2023 ftccsdartic 2023-12-02T23:31:14Z In the ocean, the interplay between heat diffusion and salt diffusion can drive double diffusive instability and lead to the formation of spatially periodic density profiles. These periodic structures, called thermohaline staircases, can persist over large regions and have also been suggested to exist in astrophysical bodies, such as in giant planet interiors. In this talk, we show that such periodically stratified fluids can host internal gravity waves with properties reminiscent of photonic crystal and topological insulator physics. Combining experimental, numerical and analytical modeling, we show the formation of band gaps and surface states that are exponentially localized near interfaces and controlled by boundary conditions. We also find that these internal wave states are robust to perturbations and can be observed in numerical simulations performed with geophysical stratification profiles from the Arctic Region. Our results suggest that energy transport by internal waves could be profoundly altered by the presence of periodic stratifications naturally occurring in the ocean, and could therefore influence large-scale circulation patterns. Conference Object Arctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[PHYS]Physics [physics] [SDE]Environmental Sciences |
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[PHYS]Physics [physics] [SDE]Environmental Sciences Atis, Severine Ghaemsaidi, Sasan, J Fruchart, Michel Band gap formation in internal gravity waves propagating in periodically stratified fluids |
topic_facet |
[PHYS]Physics [physics] [SDE]Environmental Sciences |
description |
In the ocean, the interplay between heat diffusion and salt diffusion can drive double diffusive instability and lead to the formation of spatially periodic density profiles. These periodic structures, called thermohaline staircases, can persist over large regions and have also been suggested to exist in astrophysical bodies, such as in giant planet interiors. In this talk, we show that such periodically stratified fluids can host internal gravity waves with properties reminiscent of photonic crystal and topological insulator physics. Combining experimental, numerical and analytical modeling, we show the formation of band gaps and surface states that are exponentially localized near interfaces and controlled by boundary conditions. We also find that these internal wave states are robust to perturbations and can be observed in numerical simulations performed with geophysical stratification profiles from the Arctic Region. Our results suggest that energy transport by internal waves could be profoundly altered by the presence of periodic stratifications naturally occurring in the ocean, and could therefore influence large-scale circulation patterns. |
author2 |
Institut Pprime (PPRIME) Université de Poitiers-École Nationale Supérieure de Mécanique et d’Aérotechnique Poitiers (ISAE-ENSMA )-Centre National de la Recherche Scientifique (CNRS) University of Chicago Department of Mechanical Engineering Massachusetts Institute of Technology (MIT-MECHE) Massachusetts Institute of Technology (MIT) Gulliver (UMR 7083) Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Atis, Severine Ghaemsaidi, Sasan, J Fruchart, Michel |
author_facet |
Atis, Severine Ghaemsaidi, Sasan, J Fruchart, Michel |
author_sort |
Atis, Severine |
title |
Band gap formation in internal gravity waves propagating in periodically stratified fluids |
title_short |
Band gap formation in internal gravity waves propagating in periodically stratified fluids |
title_full |
Band gap formation in internal gravity waves propagating in periodically stratified fluids |
title_fullStr |
Band gap formation in internal gravity waves propagating in periodically stratified fluids |
title_full_unstemmed |
Band gap formation in internal gravity waves propagating in periodically stratified fluids |
title_sort |
band gap formation in internal gravity waves propagating in periodically stratified fluids |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-04315402 |
op_coverage |
Las Vegas, United States |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Bulletin of the American Physical Society https://hal.science/hal-04315402 Bulletin of the American Physical Society, Mar 2023, Las Vegas, United States |
op_relation |
hal-04315402 https://hal.science/hal-04315402 |
_version_ |
1786827729304289280 |