A new turbulent three-dimensional FSI benchmark FSI-PFS-3A: Definition and measurements
Publication date
2013-05
Document type
Conference paper
Author
Organisational unit
Scopus ID
Conference
International Conference on Computational Methods in Marine Engineering 2013
Publisher
International Center for Numerical Methods in Engineering
Book title
Marine 2013 : computational methods in marine engineering V ; proceedings of the V International Conference on Computational Methods in Marine Engineering, held in Hamburg, Germany, 29 - 31 May 2013
ISBN
First page
241
Last page
254
Part of the university bibliography
✅
Language
English
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 case swere designed in order to vali-date the numerical res ults based on experimental reference data [4, 12, 13, 8, 9, 10 ]. Since FSI problems often occur inturbulent flows also in the experiments similar conditions have to be provided. Inthetest - case FSI - PfS- 1a [7] presented in the first contribution to this session, acylinder is used with anattached flexible rubber plate. Theresulting FSI problem is nearly two - dimensionalregarding the phase -averaged flow and thes tructure deformations. Theac - tualtestcase FSI - PfS -3a is the reasonable further development step of this two - -dimensional flow, Which now alsoleads to a significant three - dimensional structure deformation. Thecy linder is replaced by a truncated cone .Similar to FSI - PfS - 1a [7] arubber plate is attachedat the backside. This geometrical setup is exposed to aconstant flowat Re = 32 ,000 which hisin the subcritical regime. Dueto the linearly increasing diameter of the cone the alternating eddies in the wake even become larger resulting incorre - spondingly increasing structural displacements. Owingt o thes echallenging 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. Formeasuring the flowa two - dimensional mono - particle - image velocimetry (PIV) system isapplied. In order to characterize the three - dimensional behaviorof 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 atime - resolved laser distance sensor. The resulting FSI problem shows a quasi - periodic deformation behavior so that a phase averaging of the results is reasonable. Byphase - averaging turbulent fluctua-tions are averaged out and thus a comparison with corresponding numerical simulations basedon LES [3] and RANS [12, 13] approaches is possible.
Cite as
In: Marine 2013 / Brinkmann, Birgitt. - 1. ed.. - Barcelona : Internat. Center for Numerical Methods in Engineering, 2013
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