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Analysis of the wake dynamics of stiff and flexible cantilever beams using POD and DMD

Cesur, Alper LU ; Carlsson, Christian LU ; Feymark, A. ; Fuchs, Laszlo LU and Revstedt, Johan LU (2014) In Computers & Fluids 101. p.27-41
Abstract
The wake flow behind a cantilever beam of quadratic cross-section at a Reynolds number of 50,000 is investigated using detailed simulations. Two cases are considered, the first one using a stiff beam and the second one with a beam allowing for elastic deformation due to the hydrodynamic forces. The flow is simulated using an implicit large eddy simulation (ILES) approach in OpenFOAM and the structural deformation of the beam is found from a non-linear finite element approach using OOFEM. The motion of the fluid mesh due to the structural deformation is handled by an ALE method. The wake structures are investigated using proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) of the flow field. The results show that apart... (More)
The wake flow behind a cantilever beam of quadratic cross-section at a Reynolds number of 50,000 is investigated using detailed simulations. Two cases are considered, the first one using a stiff beam and the second one with a beam allowing for elastic deformation due to the hydrodynamic forces. The flow is simulated using an implicit large eddy simulation (ILES) approach in OpenFOAM and the structural deformation of the beam is found from a non-linear finite element approach using OOFEM. The motion of the fluid mesh due to the structural deformation is handled by an ALE method. The wake structures are investigated using proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) of the flow field. The results show that apart from the wake structures originating from the vortex shedding there is also a low frequency mode, which is an oscillatory motion in the stream-wise direction, present. (C) 2014 Elsevier Ltd. All rights reserved. (Less)
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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Fluid-structure interaction, Wake flow, Large eddy simulation
in
Computers & Fluids
volume
101
pages
27 - 41
publisher
Elsevier
external identifiers
  • wos:000340851500003
  • scopus:84902959553
ISSN
0045-7930
DOI
10.1016/j.compfluid.2014.05.012
language
English
LU publication?
yes
id
aec8ab77-23d6-4667-adc0-cc2e3296d136 (old id 4648843)
date added to LUP
2016-04-01 14:00:46
date last changed
2022-03-29 18:44:56
@article{aec8ab77-23d6-4667-adc0-cc2e3296d136,
  abstract     = {{The wake flow behind a cantilever beam of quadratic cross-section at a Reynolds number of 50,000 is investigated using detailed simulations. Two cases are considered, the first one using a stiff beam and the second one with a beam allowing for elastic deformation due to the hydrodynamic forces. The flow is simulated using an implicit large eddy simulation (ILES) approach in OpenFOAM and the structural deformation of the beam is found from a non-linear finite element approach using OOFEM. The motion of the fluid mesh due to the structural deformation is handled by an ALE method. The wake structures are investigated using proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD) of the flow field. The results show that apart from the wake structures originating from the vortex shedding there is also a low frequency mode, which is an oscillatory motion in the stream-wise direction, present. (C) 2014 Elsevier Ltd. All rights reserved.}},
  author       = {{Cesur, Alper and Carlsson, Christian and Feymark, A. and Fuchs, Laszlo and Revstedt, Johan}},
  issn         = {{0045-7930}},
  keywords     = {{Fluid-structure interaction; Wake flow; Large eddy simulation}},
  language     = {{eng}},
  pages        = {{27--41}},
  publisher    = {{Elsevier}},
  series       = {{Computers & Fluids}},
  title        = {{Analysis of the wake dynamics of stiff and flexible cantilever beams using POD and DMD}},
  url          = {{http://dx.doi.org/10.1016/j.compfluid.2014.05.012}},
  doi          = {{10.1016/j.compfluid.2014.05.012}},
  volume       = {{101}},
  year         = {{2014}},
}