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Diffusive transport in spatially periodic hydrodynamic flows

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We calculate the effective diffusion coefficient in convective flows which are well described by one spatial mode. We use an expansion in the distance from onset and homogenization methods to obtain an explicit expression for the transport coefficient. We find that spatially periodic fluid flow enhances the molecular diffusion D by a term proportional to D-1. This enhancement should be easy to observe in experiments, since D is a small number.

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Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevA.34.4136

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Articles publicats en revistes (Ciència dels Materials i Química Física)

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Diffusive transport in spatially periodic hydrodynamic flows