| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Global Stability Analysis of Flow Past Two Side-by-Side Circular Cylinders at Low Reynolds Numbers by a POD-Galerkin Spectral Method |
| ZHANG Wei1**, CHEN Cheng2 |
1School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010
2Low Speed Aerodynamics Institute, China Aerodynamics Research & Development Center, Mianyang 622762 |
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| Cite this article: |
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Abstract A proper orthogonal decomposition (POD) method is applied to the problem of a two-dimensional flow past two side-by-side circular cylinders. Based on the POD bases, which are constructed by a snapshot method, a low-dimensional model is established for representing two-dimensional incompressible Navier–Stokes equations. Coupled with the low-dimensional model, the Chiba method is used to analyze the global stability of the basic flow. Different bifurcation paths at three major regions are revealed, in good agreement with the available results by other methods. However, the computation amount in the POD method is low, which shows the availability and advantage of the POD method.
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Received: 13 February 2012
Published: 31 July 2012
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| PACS: |
47.15.Fe
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(Stability of laminar flows)
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47.20.Gv
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(Viscous and viscoelastic instabilities)
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47.11.Kb
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(Spectral methods)
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Abstract
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