Flowing Liquid Crystal Torons Around Obstacles
Liquid crystal torons, localized topological structures, are known for their stability and dynamic behaviour in response to external stimuli, making them attractive for advanced material applications. In this study, we investigate the flow of torons in chiral nematic liquid crystals around obstacles...
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| Language: | English |
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MDPI AG
2024-10-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/15/11/1302 |
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| author | Júlio P. A. Santos Mahmoud Sedahmed Rodrigo C. V. Coelho Margarida M. Telo da Gama |
| author_facet | Júlio P. A. Santos Mahmoud Sedahmed Rodrigo C. V. Coelho Margarida M. Telo da Gama |
| author_sort | Júlio P. A. Santos |
| collection | DOAJ |
| description | Liquid crystal torons, localized topological structures, are known for their stability and dynamic behaviour in response to external stimuli, making them attractive for advanced material applications. In this study, we investigate the flow of torons in chiral nematic liquid crystals around obstacles. We simulate the fluid flow and director field interactions using a hybrid numerical method combining lattice Boltzmann and finite difference techniques. Our results reveal that the toron dynamical behaviour depends strongly on the impact parameter from the obstacle. At impact parameters smaller than half cholesteric pitch, the flowing toron is destabilized by the interaction with the obstacle; otherwise, the flowing toron follows a trajectory with a deflection which decays exponentially with the impact parameter. Additionally, we explore the scattering of torons by multiple obstacles, providing insights into how the dynamics of these structures respond to complex environments. |
| format | Article |
| id | doaj-art-2a72640a43ae4ee299d09c9ffd126005 |
| institution | OA Journals |
| issn | 2072-666X |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-2a72640a43ae4ee299d09c9ffd1260052025-08-20T02:05:06ZengMDPI AGMicromachines2072-666X2024-10-011511130210.3390/mi15111302Flowing Liquid Crystal Torons Around ObstaclesJúlio P. A. Santos0Mahmoud Sedahmed1Rodrigo C. V. Coelho2Margarida M. Telo da Gama3Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalIndependent Researcher, Cairo 11528, EgyptCentro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalCentro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisboa, PortugalLiquid crystal torons, localized topological structures, are known for their stability and dynamic behaviour in response to external stimuli, making them attractive for advanced material applications. In this study, we investigate the flow of torons in chiral nematic liquid crystals around obstacles. We simulate the fluid flow and director field interactions using a hybrid numerical method combining lattice Boltzmann and finite difference techniques. Our results reveal that the toron dynamical behaviour depends strongly on the impact parameter from the obstacle. At impact parameters smaller than half cholesteric pitch, the flowing toron is destabilized by the interaction with the obstacle; otherwise, the flowing toron follows a trajectory with a deflection which decays exponentially with the impact parameter. Additionally, we explore the scattering of torons by multiple obstacles, providing insights into how the dynamics of these structures respond to complex environments.https://www.mdpi.com/2072-666X/15/11/1302liquid crystalstopologyhydrodynamicslattice Boltzmann method |
| spellingShingle | Júlio P. A. Santos Mahmoud Sedahmed Rodrigo C. V. Coelho Margarida M. Telo da Gama Flowing Liquid Crystal Torons Around Obstacles Micromachines liquid crystals topology hydrodynamics lattice Boltzmann method |
| title | Flowing Liquid Crystal Torons Around Obstacles |
| title_full | Flowing Liquid Crystal Torons Around Obstacles |
| title_fullStr | Flowing Liquid Crystal Torons Around Obstacles |
| title_full_unstemmed | Flowing Liquid Crystal Torons Around Obstacles |
| title_short | Flowing Liquid Crystal Torons Around Obstacles |
| title_sort | flowing liquid crystal torons around obstacles |
| topic | liquid crystals topology hydrodynamics lattice Boltzmann method |
| url | https://www.mdpi.com/2072-666X/15/11/1302 |
| work_keys_str_mv | AT juliopasantos flowingliquidcrystaltoronsaroundobstacles AT mahmoudsedahmed flowingliquidcrystaltoronsaroundobstacles AT rodrigocvcoelho flowingliquidcrystaltoronsaroundobstacles AT margaridamtelodagama flowingliquidcrystaltoronsaroundobstacles |