Global Stability Analysis of the Wake behind a Circular Cylinder Based on the POD-Chiba Method

Abstract:

Article Preview

A proper orthogonal decomposition (POD) method is applied to study the global stability analysis for flow past a stationary circular cylinder. The flow database at Re=100 is obtained by CFD software, i.e. FLUENT, with which POD bases are constructed by a snapshot method. Based on the POD bases, a low-dimensional model is established for solving the two-dimensional incompressible NS equations. The stability of the flow solution is evaluated by a POD-Chiba method in the way of the eigensystem analysis for the velocity disturbance. The linear stability analysis shows that the first Hopf bifurcation takes place at Re=46.9, which is in good agreement with available results by other high-order accurate stability analysis methods. However, the calculated amount of POD is little, which shows the availability and advantage of the POD method.

Info:

Periodical:

Edited by:

Robert Zhu

Pages:

72-76

DOI:

10.4028/www.scientific.net/AMM.137.72

Citation:

W. Zhang et al., "Global Stability Analysis of the Wake behind a Circular Cylinder Based on the POD-Chiba Method", Applied Mechanics and Materials, Vol. 137, pp. 72-76, 2012

Online since:

October 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.