Bulletin of the American Physical Society
75th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 20–22, 2022; Indiana Convention Center, Indianapolis, Indiana.
Session A03: Active Matter I: Active Turbulence
8:00 AM–9:57 AM,
Sunday, November 20, 2022
Chair: Paulo Arratia, UPenn
Abstract: A03.00004 : Active Turbulence - Statistical Analysis*
8:39 AM–8:52 AM
We show simulation results for an active suspension, obtained with the fluid-particle solver module of the BoSSS framework (https://github.com/FDYdarmstadt/BoSSS). Position, orientation and velocity data are used to calculate probability density functions (PDF) describing the statistics of the active suspension. These data are compared to theoretical results, which are based on the infinite hierarchy of PDF-equations, derived in Deußen et al. (Phys. Fluids, 33, 061902, 2021). We derive Lie symmetries for the PDF-equations, which are then used to obtain group invariant solutions. Comparing the simulation data to the solutions connects the observed turbulent phenomenons to the underlying theory and, subsequently, contributes to the understanding of active suspensions.
*Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project number 233630050 - TRR 146
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