UFR 2-14 Description: Difference between revisions
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== Introduction == | == Introduction == | ||
In this contribution, a thin flexible structure behind a bluff body in the sub-critical Reynolds number | |||
regime is considered. Such a geometrically simple fluid-structure interaction (FSI) problem is | |||
useful to validate numerical methods and to investigate how they react on different parameter settings. | |||
The long-term objective of the present research project is to simulate practical | |||
light-weight structural systems in turbulent flows (textile awnings, outdoor tents,...). For this | |||
purpose a new numerical FSI simulation methodology using large-eddy simulation (LES) was | |||
developed especially for thin flexible structures within turbulent flows (Breuer et al., 2012). The method was | |||
validated at first in laminar flows based on the well-known FSI3 benchmark (Turek and Hron, 2006; Turek et al., 2010). The second | |||
step is to test it in turbulent flows requiring a geometrically simple reference test case com- | |||
posed of a thin flexible structure within the turbulent flow regime. A deformable splitter plate | |||
clamped behind a bluff body represents on the one hand a geometrically manageable setup. | |||
On the other hand complex physical flow features such as separation, transition, and vortex | |||
shedding are guaranteed. Hence, it seems to be a good choice. Experimental data are required | |||
to evaluate the numerical predictions and to assure their reliability. | |||
See [http://uriah.dedi.melbourne.co.uk/w/index.php/UFR_2-13_Description UFR 2-13] | See also [http://uriah.dedi.melbourne.co.uk/w/index.php/UFR_2-13_Description UFR 2-13] | ||
== Review of previous studies == | == Review of previous studies == | ||
Revision as of 09:42, 3 May 2014
Fluid-structure interaction in turbulent flow past cylinder/plate configuration II
Flows Around Bodies
Underlying Flow Regime 2-14
Description
Introduction
In this contribution, a thin flexible structure behind a bluff body in the sub-critical Reynolds number regime is considered. Such a geometrically simple fluid-structure interaction (FSI) problem is useful to validate numerical methods and to investigate how they react on different parameter settings. The long-term objective of the present research project is to simulate practical light-weight structural systems in turbulent flows (textile awnings, outdoor tents,...). For this purpose a new numerical FSI simulation methodology using large-eddy simulation (LES) was developed especially for thin flexible structures within turbulent flows (Breuer et al., 2012). The method was validated at first in laminar flows based on the well-known FSI3 benchmark (Turek and Hron, 2006; Turek et al., 2010). The second step is to test it in turbulent flows requiring a geometrically simple reference test case com- posed of a thin flexible structure within the turbulent flow regime. A deformable splitter plate clamped behind a bluff body represents on the one hand a geometrically manageable setup. On the other hand complex physical flow features such as separation, transition, and vortex shedding are guaranteed. Hence, it seems to be a good choice. Experimental data are required to evaluate the numerical predictions and to assure their reliability.
See also UFR 2-13
Review of previous studies
See UFR 2-13
Choice of test case
In the present study a slightly different configuration than in FSI-PfS-1a is considered. Nevertheless, both cases belong to the same series of investigations carried out in order to provide appropriate benchmark test cases for FSI.
Again the structural model consists of a fixed cylinder with a rubber tail (different material than before). Furthermore, in contrast to FSI-PfS-1a a rear mass is attached to the (para-)rubber plate. These modifications lead to stronger (completely two-dimensional) deflections and another swiveling mode of the structure. Again, strong emphasis is put on a precise description of the experimental measurements, a comprehensive discussion of the modeling in the numerical simulation (for the single field solutions as well as for the coupled problem) and the processing of the respective data to guarantee a reliable reproduction of the proposed test case with various suitable methods. A detailed description of the present test case including all details of the experimental investigations is also published in Kalmbach and Breuer (2013).
Note that the entire experimental setup and the computational framework is identical to FSI-PfS-1a. Thus in the following these parts are not repeated but links to the corresponding descriptions provided for FSI-PfS-1a are given.
Contributed by: Andreas Kalmbach, Guillaume De Nayer, Michael Breuer — Helmut-Schmidt Universität Hamburg
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