Author(s): L. Len; S. Crelle; L. Schindfessel; T. De Mulder

Linked Author(s): Tom De Mulder

Keywords: No Keywords

Abstract: The present work presents an experimental study in which resonant surface oscillations inside a lateral cavity are reconstructed, often denoted as seiching, which are excited by a shallow main stream flowing past the horizontal basin. Firstly, the flow configurations that trigger transverse and/or longitudinal seiching are studied using pressure measurements in the corners of the cavity, which shows that a transitional Froude number exists, approximately0.63, at which the dominant seiching mode changes from transverse to longitudinal seiching. For both types of resonant conditions, the surface shape is analyzed in detail using a three-dimensional particle tracking velocimetry (3D-PTV) setup. Based upon floating seeding particles, the 3D surface is reconstructed with a superior spatial resolution compared to traditional measurement techniques, which confirms the multimodal aspect of the surface oscillations.

DOI: https://doi.org/10.1051/e3sconf/20184005033

Year: 2018