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We report an experimental study of the dynamics of a liquid ridge straddling a chemical discontinuity which separates two different solid surfaces. Measuring the displacements and contact angles on both sides, we describe in detail the different regimes of motion and in particular a stationary regime which corresponds to uniform translation. These results are in qualitative agreement with a theoretical model, although we see a deformation of the drop shape when compared to a circular profile, which is the currently admitted hypothesis.
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Ondarçuhu et al. (1991) studied this question.
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