A reduced-order model for unsteady flow over circular cylinder

Mehdi Ghommem, Imran Akhtar, Muhammad R. Hajj, Ishwar K. Puri

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

Proper orthogonal decomposition (POD) is performed on steady and unsteady flows past a circular cylinder. The unsteady flow considered here is obtained by adding a sinusoidal component to the steady mean flow. The results show that the first two modes in both flows are almost identical. On the other hand, the mean flow unsteadiness yields an additional mode. Consequently, the POD-based reduced-order models for the steady flow cannot be readily used to reproduce flow characteristics of the unsteady flow. A reformulation of the reduced-order model that makes use of the POD modes obtained from steady flow and that incorporates unsteadiness parameters is presented.

Original languageEnglish
Title of host publication48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
DOIs
StatePublished - 2010

Publication series

Name48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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