Abstr:UFR 2-14: Difference between revisions
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sensor is used. The three-dimensional fluid velocity results show | sensor is used. The three-dimensional fluid velocity results show | ||
shedding vortices behind the structure, which reaches the second | shedding vortices behind the structure, which reaches the second | ||
swiveling mode with a frequency of about | swiveling mode with a frequency of about 11.2 Hz | ||
corresponding to a Strouhal number of | corresponding to a Strouhal number of St = 0.177. Providing | ||
phase-averaged flow and structure measurements precise experimental | phase-averaged flow and structure measurements precise experimental | ||
data for coupled computational fluid dynamics (CFD) and | data for coupled computational fluid dynamics (CFD) and | ||
computational structure dynamics (CSD) validations are available for | computational structure dynamics (CSD) validations are available for | ||
this new benchmark case denoted FSI-PfS-2a. The test case possesses | this new benchmark case denoted FSI-PfS-2a. The test case possesses | ||
four main advantages: (i) The geometry is rather simple; (ii) | four main advantages: | ||
Kinematically, the rotation of the front cylinder is avoided; (iii) | |||
The boundary conditions are well defined; (iv) Nevertheless, the | (i) The geometry is rather simple; | ||
resulting flow features and structure displacements are challenging | (ii) Kinematically, the rotation of the front cylinder is avoided; | ||
from the computational point of view | (iii) The boundary conditions are well defined; | ||
(iv) Nevertheless, the resulting flow features and structure displacements are challenging | |||
from the computational point of view. | |||
Revision as of 07:18, 17 December 2013
Fluid-structure interaction II
Flows Around Bodies
Underlying Flow Regime 2-14
Abstract
The investigation of the bidirectional coupling between a fluid flow and a structure motion is a growing branch of research in science and industry. Applications of so-called fluid-structure interactions (FSI) are widespread. To improve coupled numerical FSI simulations, generic experimental benchmark studies of the fluid and the structure are necessary. In this work, the coupling of a vortex-induced periodic deformation of a flexible structure mounted behind a rigid cylinder and a fully turbulent water flow performed at a Reynolds number of \mbox{Re = $30,470$} is experimentally investigated with a planar particle image velocimetry (PIV) and a volumetric three-component velocimetry (V3V) system. To determine the structure displacements a multiple-point laser triangulation sensor is used. The three-dimensional fluid velocity results show shedding vortices behind the structure, which reaches the second swiveling mode with a frequency of about 11.2 Hz corresponding to a Strouhal number of St = 0.177. Providing phase-averaged flow and structure measurements precise experimental data for coupled computational fluid dynamics (CFD) and computational structure dynamics (CSD) validations are available for this new benchmark case denoted FSI-PfS-2a. The test case possesses four main advantages:
(i) The geometry is rather simple; (ii) Kinematically, the rotation of the front cylinder is avoided; (iii) The boundary conditions are well defined; (iv) Nevertheless, the resulting flow features and structure displacements are challenging
from the computational point of view.
Contributed by: Andreas Kalmbach, Guillaume De Nayer, Michael Breuer — Helmut-Schmidt Universität Hamburg
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