PUBLICACIÓN

Spin and velocity correlations in a confined two-dimensional fluid of disk-shaped active rotors

ACCEDER A LA PUBLICACIÓN: Scopus Orcid

Lopez-Castano M.A.; Seco A.M.; Seco A.M.; Rodriguez-Rivas A.; Vega Reyes F.

2023 PHYSICS OF FLUIDS

Computational Mechanics (Q1), Condensed Matter Physics (Q1), Fluid Flow and Transfer Processes (Q1), Mechanical Engineering (Q1), Mechanics of Materials (Q1)

JCR: 4.1

SJR: 1.05

CITAS

1

DOI

10.1063/5.0135233

EID

2-s2.0-85150640340

ISSN

1070-6631

EISSN

1089-7666

BIBTEX

<jats:p>We study the velocity autocorrelations in an experimental configuration of confined two-dimensional active rotors (disks). We report persistent small scale oscillations in both rotational and translational velocity autocorrelations, with their characteristic frequency increasing as rotational activity increases. While these small oscillations are qualitatively similar in all experiments, we found that, at strong particle rotational activity, the large scale particle spin fluctuations tend to vanish, with the small oscillations around zero persisting in this case, and spins remain predominantly and strongly anti-correlated at longer times. For weaker rotational activity, however, spin fluctuations become increasingly larger, and angular velocities remain de-correlated at longer times. We discuss in detail how the autocorrelation oscillations are related to the rotational activity and why this feature is, generically, a signal of the emergence of chirality in the dynamics of a particulate system.</jats:p>

AUTORES DE LA UEX

Francisco Vega Reyes

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