Self-Sustaining Process through Streak Generation in a Flat-Plate Boundary Layer Export

@article{citeulike:5919373, abstract = {The existence of a self-sustaining process between streamwise vortices and streaks has been suggested at moderate Reynolds numbers. Such a mechanism has never been demonstrated experimentally. Using small cylinders as vortex generators to create streamwise counterrotating vortices, we show, through the characterization of the spatial transient growth of the energy of the longitudinal and spanwise velocity perturbations, that such a mechanism exists above a given Reynolds number. From instantaneous particle image velocimetry fields in a horizontal plane, we show that the self-sustaining process can also be associated with the longitudinal destabilization of streamwise streaks.}, author = {Duriez, Thomas and Aider, Jean L. and Wesfreid, Jos\'{e} E.}, citeulike-article-id = {5919373}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000103000014144502000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v103/e144502}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevLett.103.144502}, doi = {10.1103/PhysRevLett.103.144502}, journal = {Physical Review Letters}, keywords = {coherent\_structures, tbl}, number = {14}, pages = {144502+}, posted-at = {2009-10-10 13:11:50}, priority = {2}, publisher = {APS}, title = {Self-Sustaining Process through Streak Generation in a Flat-Plate Boundary Layer}, url = {http://dx.doi.org/10.1103/PhysRevLett.103.144502}, volume = {103}, year = {2009} }

TY - JOUR ID - citeulike:5919373 L3 - citeulike-article-id:5919373 N2 - The existence of a self-sustaining process between streamwise vortices and streaks has been suggested at moderate Reynolds numbers. Such a mechanism has never been demonstrated experimentally. Using small cylinders as vortex generators to create streamwise counterrotating vortices, we show, through the characterization of the spatial transient growth of the energy of the longitudinal and spanwise velocity perturbations, that such a mechanism exists above a given Reynolds number. From instantaneous particle image velocimetry fields in a horizontal plane, we show that the self-sustaining process can also be associated with the longitudinal destabilization of streamwise streaks. IS - 14 JF - Physical Review Letters TI - Self-Sustaining Process through Streak Generation in a Flat-Plate Boundary Layer PB - APS VL - 103 SP - 144502 KW - coherent_structures KW - tbl AU - Duriez, Thomas AU - Aider, Jean AU - Wesfreid, José PY - 2009/// UR - http://dx.doi.org/10.1103/PhysRevLett.103.144502 ER -