Interface dynamics of wet active systems
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arXiv
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866908278769844224 |
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| author | Caballero, Fernando Maitra, Ananyo Nardini, Cesare |
| author_facet | Caballero, Fernando Maitra, Ananyo Nardini, Cesare |
| contents | We study the roughening of interfaces in phase-separated active suspensions on substrates. At both large length and timescales, we show that the interfacial dynamics belongs to the |q|KPZ universality class discussed in Besse et al. Phys. Rev. Lett. 130, 187102 (2023). This holds despite the presence of long-ranged fluid flows. At early times, however, or for sufficiently small systems, the roughening exponents are the same as those in the presence of a momentum-conserving fluid. Surprisingly, when the effect of substrate friction can be ignored, the interface becomes random beyond a de Gennes-Taupin lengthscale which depends on the interfacial tension. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2409_02288 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Interface dynamics of wet active systems Caballero, Fernando Maitra, Ananyo Nardini, Cesare Soft Condensed Matter Statistical Mechanics We study the roughening of interfaces in phase-separated active suspensions on substrates. At both large length and timescales, we show that the interfacial dynamics belongs to the |q|KPZ universality class discussed in Besse et al. Phys. Rev. Lett. 130, 187102 (2023). This holds despite the presence of long-ranged fluid flows. At early times, however, or for sufficiently small systems, the roughening exponents are the same as those in the presence of a momentum-conserving fluid. Surprisingly, when the effect of substrate friction can be ignored, the interface becomes random beyond a de Gennes-Taupin lengthscale which depends on the interfacial tension. |
| title | Interface dynamics of wet active systems |
| topic | Soft Condensed Matter Statistical Mechanics |
| url | https://arxiv.org/abs/2409.02288 |