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dc.contributor.authorAlvarez-Lacalle, Enrique
dc.contributor.authorGadelha, Hermes
dc.contributor.authorMiranda, José A.
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física Aplicada
dc.identifier.citationAlvarez-Lacalle, E.; Gadelha, H.; Miranda, J. A.;. (2008). Coriolis effects on fingering patterns under rotation . Physical Review E, 78 (2): 26305(1)-26305(10). ISSN:1539-3755
dc.description.abstractThe development of immiscible viscous fingering patterns in a rotating Hele-Shaw cell is investigated. We focus on understanding how the time evolution and the resulting morphologies are affected by the action of the Coriolis force. The problem is approached analytically and numerically by employing a vortex sheet formalism. The vortex sheet strength and a linear dispersion relation are derived analytically, revealing that the most relevant Coriolis force contribution comes from the normal component of the averaged interfacial velocity. It is shown that this normal velocity, uniquely due to the presence of the Coriolis force, is responsible for the complex-valued nature of the linear dispersion relation making the linear phases vary with time. Fully nonlinear stages are studied through intensive numerical simulations. A suggestive interplay between inertial and viscous effects is found, which modifies the dynamics, leading to different pattern-forming structures. The inertial Coriolis contribution plays a characteristic role: it generates a phase drift by deviating the fingers in the sense opposite to the actual rotation of the cell. However, the direction and intensity of finger bending is predominantly determined by viscous effects, being sensitive to changes in the magnitude and sign of the viscosity contrast. The finger competition behavior at advanced time stages is also discussed
dc.publisherAmerican Physical Society
dc.subjectÀrees temàtiques de la UPC::Física::Física de fluids
dc.subject.lcshFluid dynamics
dc.subject.otherPattern selection
dc.subject.otherLaminar flows
dc.subject.otherFlow instabilities
dc.titleCoriolis effects on fingering patterns under rotation
dc.subject.lemacDinàmica de fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. NOLIN - Física No-Lineal i Sistemes Fora de l'Equilibri
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (updated version)

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