A new turbulent three-dimensional FSI benchmark FSI-PFS-3A: definition and measurements
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Inclou dades d'ús des de 2022
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hdl:2117/332733
Tipus de documentText en actes de congrés
Data publicació2013
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
In the last decade, the demand for the prediction of complex multi-physics prob-
lems such as fluid-structure interaction (FSI) has strongly increased. For the development and
improvement of appropriate numerical tools several test cases were designed in order to vali- date
the numerical results based on experimental reference data [4, 12, 13, 8, 9, 10]. Since FSI
problems often occur in turbulent flows also in the experiments similar conditions have to be
provided. In the test-case FSI-PfS-1a [7] presented in the first contribution to this session, a
cylinder is used with an attached flexible rubber plate. The resulting FSI problem is nearly
two-dimensional regarding the phase-averaged flow and the structure deformations. The ac- tual
test case FSI-PfS-3a is the reasonable further development step of this two-dimensional benchmark
to a forced fully three-dimensional flow, which now also leads to a significant three- dimensional
structure deformation. The cylinder is replaced by a truncated cone. Similar to FSI-PfS-1a [7] a
rubber plate is attached at the backside. This geometrical setup is exposed to a constant flow at
Re = 32,000 which is in the subcritical regime. Due to the linearly increasing diameter of the cone
the alternating eddies in the wake even become larger resulting in corre- spondingly increasing
structural displacements. Owing to these challenging flow and structure effects, this benchmark
will be the next step for validating FSI predictions for real applications. The experiments are
performed in a water channel with clearly defined and controllable bound- ary and operating
conditions. For measuring the flow a two-dimensional mono-particle-image velocimetry (PIV) system
is applied. In order to characterize the three-dimensional behavior of the flow, phase-averaged
PIV measurements are performed at three different planes. The structural deformations are measured
along a line on the structure surface with a time-resolved laser distance sensor. The resulting FSI
problem shows a quasi-periodic deformation behavior so that a phase averaging of the results is
reasonable. By phase-averaging turbulent fluctua- tions are averaged out and thus a comparison
with corresponding numerical simulations based on LES [3] and RANS [12, 13] approaches is possible.
CitacióKalmbach, A.; De Nayer, G.; Breuer, M. A new turbulent three-dimensional FSI benchmark FSI-PFS-3A: definition and measurements. A: MARINE V. "MARINE V : proceedings of the V International Conference on Computational Methods in Marine Engineering". CIMNE, 2013, p. 241-254. ISBN 978-84-941407-4-7.
ISBN978-84-941407-4-7
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Marine-2013_20- ... LENT THREE-DIMENSIONAL.pdf | 2,333Mb | Visualitza/Obre |