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The motion of particles in a channel containing solute is, in part, a result of diffusiophoresis. Previous studies of diffusiophoresis in narrow channels have focused on quasi-one-dimensional dynamics. We consider the two-dimensional dynamics in an early-time regime. In this regime, spanwise variations in solute concentration have not yet diminished, and cross-channel particle migration may be significant.
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Migacz et al. (2022) studied this question.
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