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The numerical simulation of wetting and dewetting of geometrically complexsurfaces benefits from unstructured numerical methods because they discretizethe domain with second-order accuracy. A recently developed unstructuredgeometric Volume-of-Fluid (VOF) method, the plicRDF-isoAdvector method, ischosen to investigate wetting processes because of its volume conservationproperty and high computational efficiency. The present work verifies andvalidates the plicRDF-isoAdvector method for wetting problems. We present fourverification studies. The first study investigates the accuracy of theinterface advection near walls. The method is further investigated for thespreading of droplets on a flat and a spherical surface, respectively, forwhich excellent agreement with the reference solutions is obtained.Furthermore, a 2D capillary rise is considered, and a benchmark comparisonbased on results from previous work is performed. The benchmark suite, inputdata, and Jupyter Notebooks used in this study are publicly available tofacilitate further research and comparison with other numerical codes.

Numerical wetting benchmarks -- advancing the plicRDF-isoAdvector unstructured Volume-of-Fluid (VOF) method