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Updated: Oct 28, 2025

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Collective excitations in active fluids: Microflows and breakdown in spectral equipartition of kinetic energy
Nikita P Kryuchkov1, Stanislav O Yurchenko1
1Bauman Moscow State Technical University, 2nd Baumanskaya str. 5, 105005 Moscow, Russia.
Abstract:
The effect of particle activity on collective excitations in active fluids of microflyers is studied. With an in silico study, we observed an oscillating breakdown of equipartition (uniform spectral distribution) of kinetic energy in reciprocal space. The phenomenon is related to short-range velocity-velocity correlations that were realized without forming of long-lived mesoscale vortices in the system. This stands in contrast to well-known mesoscale turbulence operating in active nematic systems (bacterial or artificial) and reveals the features of collective dynamics in active fluids, which should be important for structural transitions and glassy dynamics in active matter.
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