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Model Reduction for Compressible Flows using POD and Galerkin Projection
Abstract We present a framework for applying the me
We present a framework for applying the method of Proper Orthogonal Decomposition (POD) and Galerkin projection to compressible fluids. For incompressible flows, only the kinematic variables are important, and the techniques are well known. In a compressible flow, both the kinematic and thermodynamic variables are dynamically important, and must be included in the configuration space. We introduce an energy-based inner product which may be used to obtain POD modes for this configuration space. We then obtain an approximate version of the Navier-Stokes equations, valid for cold flows at moderate Mach number, and project these equations onto a POD basis. The resulting equations of motion are quadratic, and are much simpler than projections of the full compressible Navier-Stokes equations.
full compressible Navier-Stokes equations.  +
Authors Clarence W. Rowley, Tim Colonius, Richard M. Murray  +
ID 2002w  +
Source <i>Physica D</i>, 189(1–2):115–129  +
Tag rcm04-physd  +
Title Model Reduction for Compressible Flows using POD and Galerkin Projection +
Type Journal submission  +
Categories Papers
Modification date
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15 May 2016 06:18:49  +
URL
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http://www.cds.caltech.edu/~murray/preprints/rcm03-physd.pdf  +
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Model Reduction for Compressible Flows using POD and Galerkin Projection + Title
 

 

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