Author(s): Naveed Ul Hassan Bhat; Gourabananda Pahar
Linked Author(s):
Keywords: Fluid-granular interaction; Landslide; Tsunami generation; Granular column collapse; Numerical simulation
Abstract: Landslide generated waves are a significant occurrence across the water bodies, i.e., coastal banks, rivers, lakes, etc. The wave generation process is abetted by the presence of geological formations like loose soil, rocks, ice deposits and the geometric features like steep slopes, confined water bodies etc. In the current study the wave generation induced by collapse of partially submerged granular columns is investigated through experimental and numerical models. The experiments were conducted in a laboratory flume by creating a granular column of monodisperse glass beads held by a retractable gate. The landslide is initiated by lifting of the gate and subsequent waves generated are recorded through multiple devices. The influence of the submergence ratio on the wave pattern and granular deformation mechanism has been investigated. The parameters like the maximum amplitude, wave progression speed, and spatiotemporal variation of wave heights have been quantified with varying submergence conditions. The wave generation can be related to the hindrance to column mobility by the surrounding fluid reflected in terms of the maximum runout of the granular matter.
Year: 2026