%0 Journal Article %T Dynamic mode decomposition of numerical and experimental data %+ Laboratoire d'hydrodynamique (LadHyX) %A Schmid, Peter, J. %< avec comité de lecture %@ 0022-1120 %J Journal of Fluid Mechanics %I Cambridge University Press (CUP) %V 656 %N August %P 5-28 %8 2010 %D 2010 %R 10.1017/s0022112010001217 %Z Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph] %Z Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]Journal articles %X The description of coherent features of fluid flow is essential to our understanding of fluid-dynamical and transport processes. A method is introduced that is able to extract dynamic information from flow fields that are either generated by a (direct) numerical simulation or visualized/measured in a physical experiment. The extracted dynamic modes, which can be interpreted as a generalization of global stability modes, can be used to describe the underlying physical mechanisms captured in the data sequence or to project large-scale problems onto a dynamical system of significantly fewer degrees of freedom. The concentration on subdomains of the flow field where relevant dynamics is expected allows the dissection of a complex flow into regions of localized instability phenomena and further illustrates the flexibility of the method, as does the description of the dynamics within a spatial framework. Demonstrations of the method are presented consisting of a plane channel flow, flow over a two-dimensional cavity, wake flow behind a flexible membrane and a jet passing between two cylinders. © 2010 Cambridge University Press. %G English %2 https://polytechnique.hal.science/hal-01020654/document %2 https://polytechnique.hal.science/hal-01020654/file/DMS0022112010001217a.pdf %L hal-01020654 %U https://polytechnique.hal.science/hal-01020654 %~ X %~ CNRS %~ X-LADHYX %~ X-DEP %~ X-DEP-MECA