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Streamwise-localized solutions at the onset of turbulence in pipe flow
Àvila Cañellas, Marc; Mellibovsky Elstein, Fernando; Roland, N.; Hof, Björn
Universitat Politècnica de Catalunya. Escola d'Enginyeria de Telecomunicació i Aeroespacial de Castelldefels (EETAC); Universitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
Although the equations governing fluid flow are well known, there are no analytical expressions that describe the complexity of turbulent motion. A recent proposition is that in analogy to low dimensional chaotic systems, turbulence is organized around unstable solutions of the governing equations which provide the building blocks of the disordered dynamics. We report the discovery of periodic solutions which just like intermittent turbulence are spatially localized and show that turbulent transients arise from one such solution branch. 2013 American Physical Society.
Àrees temàtiques de la UPC::Física::Física de fluids
Fluid mechanics
transition to turbulence
Turbulence Chaotic systems
Mecànica de fluids
Fluix bifàsic

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