Measurement of capillary-gravity wave transmission past a cylindrical barrier with meniscus effects

The scattering of gravity-dominated surface waves by cylindrical barriers is a well-studied problem in hydrodynamics. In contrast, meaningful insight into capillary-gravity wave interactions has only emerged more recently, primarily through analytical or numerical studies with limited experimental validation. In this work, we present an experimental investigation of capillary-gravity surface wave transmission past a horizontally-oriented cylindrical barrier. Using an acoustic measurement approach, we quantify wave transmission while systematically varying the surface wave frequency and contact angle. Additionally, we develop a dependable method to extract the contact angle at the solid–liquid–air interface, enabling a more complete description of the boundary conditions. Our findings reveal how meniscus geometry and wave frequency influence transmission, and a comparison of the experimental results with theoretical modeling in the limiting case will be also included.