Author(s): Maria Rita Maggi; Claudia Adduce; Maria Eletta Negretti
Linked Author(s): Claudia Adduce
Keywords: No Keywords
Abstract: Gravity currents experiments flowing onto non-uniform sloping boundaries are performed to characterize the dynamics of the dense flow through the Particle Image Velocimetry and the Planar Laser Induced Fluorescence in order to measure velocities and the density fields. The main parameters explored are the inflow rate and the buoyancy of the inflow. The analysis performed highlights two different types of shear instabilities at the interface between the dense flow and the ambient fluid: the Holmboe instability, downstream the slope and in the initial part of the slope characterized by a slight angle variation; the Kelvin–Helmholtz instability on the steepest part of the slope.
Year: 2022