Show simple item record

dc.contributor.authorMarqués Truyol, Francisco
dc.contributor.authorLopez, Juan M
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física Aplicada
dc.identifier.citationMarques, 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.
dc.description.abstractThe 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 similar to 30, influenced by mode competition within an Eckhaus band of wavenumbers. Coexisting with some of these steady three-dimensional states, solution branches with localized defects break parity and result in spatio-temporal dynamics. We have identified two such time dependent states. One is a limit cycle that while breaking spatial parity, retains spatio-temporal parity. The other branch corresponds to quasi-periodic states that have globally broken parity. (C) 2014 AIP Publishing LLC.
dc.format.extent17 p.
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshTaylor vortices
dc.subject.lcshBenjamin-Feir instability
dc.subject.otherTaylor-Couette flow
dc.subject.otherParity-breaking bifurcation
dc.subject.otherUnsteady natural-convection
dc.subject.otherBenjamin-feir instability
dc.subject.otherInhomogeneous systems
dc.subject.otherRectangular cavity
dc.subject.otherWave interactions
dc.subject.otherRotating waves
dc.titleThree-dimensional instabilities in a discretely heated annular flow: onset of spatio-temporal complexity via defect dynamics
dc.subject.lemacDinàmica de fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. DF - Dinàmica No Lineal de Fluids
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorMarques, F.; Lopez, J.
local.citation.publicationNamePhysics of fluids

Files in this item


This item appears in the following Collection(s)

Show simple item record

Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain