An Algorithm for the Recovery of 2- and 3-D BiGlobal Instabilities of Compressible Flow Over 2-D Open Cavities
- Creators
- Theofilis, V.
- Colonius, T.
Abstract
The identification of numerical residuals from direct numerical simulations (DNS) with the least-damped BiGlobal eigenmodes of an underlying steady-state permits extraction of both the steady-state and amplitude functions of the BiGlobal eigenmodes from simple algebraic operations. Algorithms for the calculation of the basic state and the spatial structure of the related BiGlobal eigenmodes from transient DNS data have been constructed and presented. Here we extend initial calculations for the (closed) incompressible lid-driven cavity to the related (compressible) open-cavity flow. Order-of-magnitude savings are demonstrated when using of the discussed algorithm for the calculation of the basic state, compared with straightforward time-integration of the equations of motion until convergence in time. Further, employing this algorithm, different classes of instabilities in the open cavity are unified in the framework of BiGlobal instability analysis.
Additional Information
© 2003 by the American Institute of Aeronautics and Astronautics, Inc. Published Online: 25 Jun 2012. The material is based upon work supported by the European Office of Aerospace Research and Development, Air Force Research Laboratory, Air Force Office of Scientific Research, under Grants No. FA8655-03-1-3059 and F49620-02-1-0362 monitored by Dr. John D. Schmisseur (AFOSR) and Mr. Wayne Donaldson (EOARD).Attached Files
Published - TheofilisColonius2003.pdf
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Additional details
- Alternative title
- An Algorithm for the Recovery of 2- and 3D BiGlobal Instabilities of Compressible Flow Over 2D Open Cavities
- Eprint ID
- 97266
- Resolver ID
- CaltechAUTHORS:20190718-165126872
- European Office of Aerospace Research and Development
- Air Force Research Laboratory (AFRL)
- Air Force Office of Scientific Research (AFOSR)
- FA8655-03-1-3059
- Air Force Office of Scientific Research (AFOSR)
- F49620-02-1-0362
- Created
-
2019-07-24Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2003-4143