The deformation of a flexible fiber settling in a quiescent viscous\n fluid

2018/07/25 by Benjamin Marchetti, Marchetti, Benjamin, V. Raspa +11 · 3 citations
Engineering · Medicine · Physics and Astronomy · #Blood properties and coagulation #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Lattice Boltzmann Simulation Studies #Micro and Nano Robotics

paper · pdf · doi:10.48550/arxiv.1807.09890

openalex publication_date 2018/07/25 · openalex created_date 2022/08/04 · openalex updated_date 2026/07/28

Abstract

The equilibrium state of a flexible fiber settling in a viscous fluid is\nexamined using a combination of macroscopic experiments, numerical simulations\nand scaling arguments. We identify three regimes having different signatures on\nthis equilibrium configuration of the elastic filament: weak and large\ndeformation regimes wherein the drag is proportional to the settling velocity\nas expected in Stokes flow and an intermediate elastic reconfiguration regime\nwhere the filament deforms to adopt a shape with a smaller drag which is no\nlonger linearly proportional to the velocity.\n

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