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Three-dimensional instabilities in a discretely heated annular flow: onset of spatio-temporal complexity via defect dynamics

Autor
Marques, F.; Lopez, J.
Tipus d'activitat
Article en revista
Revista
Physics of fluids
Data de publicació
2014-06-10
Volum
26
Número
6
Pàgina inicial
1
Pàgina final
17
DOI
https://doi.org/10.1063/1.4881435 Obrir en finestra nova
Projecte finançador
Estructuras coherentes y turbuléncia en dominios simples.
Repositori
http://hdl.handle.net/2117/24190 Obrir en finestra nova
Resum
The transition to three-dimensional and unsteady flow in an annulus with a discrete heat source on the inner cylinder is studied numerically. For large applied heat flux through the heater (large Grashof number Gr), there is a strong wall plume originating at the heater that reaches the top and forms a large scale axisymmetric wavy structure along the top. For Gr approximate to 6 x 109, this wavy structure becomes unstable to three-dimensional instabilities with high azimuthal wavenumbers m simi...
Citació
Marques, F.; Lopez, J. Three-dimensional instabilities in a discretely heated annular flow: onset of spatio-temporal complexity via defect dynamics. "Physics of fluids", 10 Juny 2014, vol. 26, núm. 6, p. 1-17.
Paraules clau
Benjamin-feir instability, Inhomogeneous systems, Parity-breaking bifurcation, Rectangular cavity, Regime, Rotating waves, Side, Taylor-Couette flow, Unsteady natural-convection, Wave interactions
Grup de recerca
DF - Dinàmica de Fluids: formació d'estructures i aplicacions geofísiques

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