Peter Attar
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February 15, 2006 17:32 |
Re: What is the difference between POD and SVD?
In POD the fluid variables are written as a linear combination of some global modes..these global modes are computed by taking snapshots of the time history data of the fluid variables, putting them in a matrix, forming a spatial correlation matrix and then computing the eigenvalues/eigenvectors of the corelation matrix. Alternatively you can computed the POD modes by performing an SVD on the matrix of snapshot data. SVD itself is just a way to decompose a matrix.
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