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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2603.20736 |
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| _version_ | 1866917356308004864 |
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| author | Mazloum, Bahaa Stepanetz, Alexandre Dollet, Benjamin Ozawa, Misaki |
| author_facet | Mazloum, Bahaa Stepanetz, Alexandre Dollet, Benjamin Ozawa, Misaki |
| contents | We numerically study confined channel foam flow around an obstacle using a two-dimensional bubble model, inspired by experiments performed in the same geometry. We systematically vary the polydispersity, the external driving force, and the packing fraction of the system. Our simulations capture a broad range of plastic flow phenomenologies, from highly directional, sliding-like motion characteristic of crystalline materials to more isotropic and localized rearrangements typical of amorphous systems. We identify a threshold value of polydispersity that marks the crossover between crystalline-like and amorphous-like plasticity. In addition, we observe the existence of a critical external force, associated with the phenomenon of yield drag, above which the system reaches steady flow and below which it remains arrested. We determine a critical packing fraction above which such yield-drag behavior emerges. Our results provide a comprehensive framework for understanding the interplay between disorder, driving, and the presence of an obstacle in foam flows. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_20736 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Channel Foam Flow Around an Obstacle in a Two-Dimensional Bubble Model Mazloum, Bahaa Stepanetz, Alexandre Dollet, Benjamin Ozawa, Misaki Soft Condensed Matter We numerically study confined channel foam flow around an obstacle using a two-dimensional bubble model, inspired by experiments performed in the same geometry. We systematically vary the polydispersity, the external driving force, and the packing fraction of the system. Our simulations capture a broad range of plastic flow phenomenologies, from highly directional, sliding-like motion characteristic of crystalline materials to more isotropic and localized rearrangements typical of amorphous systems. We identify a threshold value of polydispersity that marks the crossover between crystalline-like and amorphous-like plasticity. In addition, we observe the existence of a critical external force, associated with the phenomenon of yield drag, above which the system reaches steady flow and below which it remains arrested. We determine a critical packing fraction above which such yield-drag behavior emerges. Our results provide a comprehensive framework for understanding the interplay between disorder, driving, and the presence of an obstacle in foam flows. |
| title | Channel Foam Flow Around an Obstacle in a Two-Dimensional Bubble Model |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2603.20736 |