Mitigating Density Fluctuations in Particle-based Active Nematic Simulations
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866913216979795968 |
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| author | Kozhukhov, Timofey Loewe, Benjamin Shendruk, Tyler N. |
| author_facet | Kozhukhov, Timofey Loewe, Benjamin Shendruk, Tyler N. |
| contents | Understanding active matter has led to new perspectives on biophysics and non-equilibrium dynamics. However, the development of numerical tools for simulating active fluids capable of incorporating non-trivial boundaries or inclusions has lagged behind. Active particle-based methods, which typically excel at this, suffer from large density fluctuations that affect the dynamics of inclusions. To this end, we advance the Active-Nematic Multi-Particle Collision Dynamics algorithm, a particle-based method for simulating active nematics, by addressing the large density fluctuations that arise from activity. This paper introduces three novel activity formulations that mitigate the coupling between activity and local density. Local density fluctuations are decreased to a level comparable to the passive limit while retaining the phenomenology of active nematics and increasing the active turbulence regime four-fold. These developments extend the technique into a flexible tool for modeling active systems, including solutes and inclusions, with broad applications for the study of biophysical systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17777 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Mitigating Density Fluctuations in Particle-based Active Nematic Simulations Kozhukhov, Timofey Loewe, Benjamin Shendruk, Tyler N. Soft Condensed Matter Computational Physics Understanding active matter has led to new perspectives on biophysics and non-equilibrium dynamics. However, the development of numerical tools for simulating active fluids capable of incorporating non-trivial boundaries or inclusions has lagged behind. Active particle-based methods, which typically excel at this, suffer from large density fluctuations that affect the dynamics of inclusions. To this end, we advance the Active-Nematic Multi-Particle Collision Dynamics algorithm, a particle-based method for simulating active nematics, by addressing the large density fluctuations that arise from activity. This paper introduces three novel activity formulations that mitigate the coupling between activity and local density. Local density fluctuations are decreased to a level comparable to the passive limit while retaining the phenomenology of active nematics and increasing the active turbulence regime four-fold. These developments extend the technique into a flexible tool for modeling active systems, including solutes and inclusions, with broad applications for the study of biophysical systems. |
| title | Mitigating Density Fluctuations in Particle-based Active Nematic Simulations |
| topic | Soft Condensed Matter Computational Physics |
| url | https://arxiv.org/abs/2401.17777 |