Meniscus Effect on Surface Wave Transmission Through a Surface-Piercing Barrier: Experiment and Simulation

The meniscus formed at solid-liquid-air boundaries is essential in physics and control of fluids. While theoretical analyses use ideal configurations, there is a lack of understanding of the meniscus effect on surface wave scattering. In this work, we combine experiments and numerical simulations to study how the meniscus formed by a vertically immersed barrier influences the transmission of capillary-gravity waves. We observe that the water column underneath meniscus enhances coupling of the fluid from incident to the transmitted side and consequently increase the transmission, while surface bending caused by the meniscus constrains surface motion and suppresses transmission. We also explore the dependencies of the transmission on the finite size of the barrier and wave frequency. A comparison between experimental measurements and potential flow simulations will be discussed.