Anisotropic drop shapes on chemically striped surfaces

A free energy-minimizing simulation that allows computation of the shapes of sessile liquid drops on chemically patterned surfaces is described. A set of nondimensional results for drops on surfaces with a single wetting stripe is presented. Quantitative agreement is found with published experimental data for drops on many-striped surfaces, and a simple model for anisotropic wetting is evaluated.

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► New, efficient method for calculating sessile drop shapes on chemically striped surfaces.
► Comprehensive set of numerical solutions for drop shapes on a chemical stripe.
► First quantitative match between computational and published experimental results.
► Numerical evaluation of a simple Cassie model for anisotropic wetting.