Hydrodynamic effects on the liquid-hexatic transition of active colloids
| Autor: | G. Negro, C. B. Caporusso, P. Digregorio, G. Gonnella, A. Lamura, A. Suma |
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| Rok vydání: | 2022 |
| Předmět: |
Statistical Mechanics (cond-mat.stat-mech)
digestive oral and skin physiology Biophysics FOS: Physical sciences Surfaces and Interfaces General Chemistry Condensed Matter - Soft Condensed Matter Condensed Matter::Soft Condensed Matter Motion Hydrodynamics Soft Condensed Matter (cond-mat.soft) General Materials Science Colloids Condensed Matter - Statistical Mechanics Biotechnology |
| DOI: | 10.48550/arxiv.2201.10019 |
| Popis: | We study numerically the role of hydrodynamics in the liquid-hexatic transition of active colloids at intermediate activity, where motility induced phase separation (MIPS) does not occur. We show that in the case of active Brownian particles (ABP), the critical density of the transition decreases upon increasing the particle's mass, enhancing ordering, while self-propulsion has the opposite effect in the activity regime considered. Active hydrodynamic particles (AHP), instead, undergo the liquid-hexatic transition at higher values of packing fraction $\phi$ than the corresponding ABP, suggesting that hydrodynamics have the net effect of disordering the system. At increasing densities, close to the hexatic-liquid transition, we found in the case of AHP the appearance of self-sustained organized motion with clusters of particles moving coherently. Comment: 14 pages, 13 figures |
| Databáze: | OpenAIRE |
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