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Bending and low‐frequency vortex shedding of flexible cylinders in laminar shear flow
Author(s) -
Derksen Jos J.
Publication year - 2021
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.17268
Subject(s) - laminar flow , mechanics , vortex shedding , lattice boltzmann methods , hagen–poiseuille equation , cylinder , shear flow , vortex , materials science , simple shear , immersed boundary method , shear (geology) , slip (aerodynamics) , flow (mathematics) , classical mechanics , physics , turbulence , reynolds number , shear stress , geometry , boundary (topology) , composite material , thermodynamics , mathematics , mathematical analysis
Simulations of the interaction between flexible cylinders attached to a solid surface and a laminar shear flow have been performed. The flow simulations fully resolve the geometrical details and are based on the lattice‐Boltzmann method. An immersed boundary method is used to impose the no‐slip conditions at the cylinder surfaces and to determine the distribution of hydrodynamic forces over the cylinder. The latter are responsible for the bending deformation of the cylinders. We first study simple shear systems under steady conditions for which experimental data are available that we use for validation. We then study flexible cylinders in Poiseuille flow that exhibit vortex shedding and demonstrate that the flexibility of the cylinders has a pronounced effect on the temporal behavior of the flow system.