Collaborative Research: Dust Entrainment Processes by Convective Vortices and Localized Turbulent Structures: Experimental and Numerical Study Collaborative Research: Dust Entrainment Processes by Convective Vortices and Localized Turbulent Structures: Experimental and Numerical Study The proposed project aims to characterize and quantify the mechanisms responsible for the entrainment of sediment particles in the surface layer by turbulence and convective vortices. A research methodology involves a joint, tightly coordinated, experimental, and numerical investigation. Experiments will use simultaneous three-dimensional particle image velocimetry (3D-PIV) combined with particle tracking velocimetry (3D-PTV) techniques. Simulations will involve a four-way coupled multiphase flow modeling approach in a wall-resolved Large Eddy Simulations (LES) framework that integrates a Discrete Element Momentum (DEM) module for the particle tracking. A particular focus of the current study is on sediment entrainment principles in horizontally inhomogeneous flow conditions, such as in the presence of convective vortices and dust devils. A scaled-down model of a convective vortex will be developed and employed, featuring a specially designed vortex generator setup equipped with 3D-PIV/3D-PTV instrumentation in laboratory experiments, and a computational model of the same format in the simulations. Interaction of a sediment layer bed with the vortex will be investigated under a variety of flow and sediment conditions.
|Effective start/end date||7/1/22 → 6/30/25|
- National Science Foundation (NSF): $331,622.00
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