Casademunt i Viader, JaumeJasnow, David2010-06-252010-06-2519910031-9007https://hdl.handle.net/2445/13164We study the dynamics of Staffman-Taylor fingering in terms of topological defects of the flow field. The defects are created and/or annihilated at the interface. The route towards the single-finger steady state is characterized by a detailed mechanism for defect annihilation. For small viscosity contrast this mechanism is impeded, and creation of new defects leads the system away from a single-finger solution. Strong evidence for a drastic reduction of the basin of attraction of the Saffman-Taylor finger is presented.4 p.application/pdfeng(c) American Physical Society, 1991Dinà mica de fluidsCristal·lografiaFluid dynamicsCrystallographyDefect dynamics in viscous fingeringinfo:eu-repo/semantics/article86555info:eu-repo/semantics/openAccess