Uhlmann, MarkusKawahara, GentaPinelli, Alfredo2023-06-202023-06-202009978-3-642-03084-010.1007/978-3-642-03085-7_140https://hdl.handle.net/20.500.14352/53258Proceedings of the 12th EUROMECH European Turbulence Conference, September 7-10, 2009, Marburg, GermanyIsothermal, incompressible flow in a straight duct with square cross-section is known to be linearly stable [1]. Direct numerical simulation, on the other hand, has revealed that turbulence in this geometry is self-sustained above a Reynolds number value of approximately 1100, based on the bulk velocity and the duct half-width [2]. Numerous non-linear equilibrium solutions have already been identified in plane Couette, plane Poiseuille and pipe flows [3, 4, 5], and their role in the transition process as well as their relevance to the statistics of turbulent flow have been investigated [6, 7, 8]. No non-linear travelling-wave solutions for the flow through a square duct have been published to date.engbook parthttp://link.springer.com/chapter/10.1007/978-3-642-03085-7_140http://www-turbul.ifh.uni-karlsruhe.de/uhlmann/particle/report/etc12.pdfhttp://www.springer.com/open access536Exact coherent structuresplane couette-flowrectangular ductpipe-flowequilibriumturbulencestabilityTermodinámica2213 Termodinámica