Capillary waves in a sharp-edged slit driven by vertical vibration

Abstract

We report an experimental study on capillary waves in a sharp-edged slit driven by vertical vibration. The standing waves of pinned meniscus oscillation in the transverse direction are determined by an applied frequency related to a dispersion relation. Standing wave patterns with mode numbers of up to 5/2 can be observed. The meniscus oscillation between the pinned edges exhibits a subharmonic mode above the critical acceleration (force), which tends to increase with increasing mode number (frequency). A subharmonic mode appears when a longitudinal wave is generated. (C) 2015 Elsevier Inc. All rights reserved.