Print Email Facebook Twitter Modeling of Breaching-Generated Turbidity Currents Using Large Eddy Simulation Title Modeling of Breaching-Generated Turbidity Currents Using Large Eddy Simulation Author Alhaddad, S.M.S. (TU Delft Environmental Fluid Mechanics) de Wit, Lynyrd (Deltares) Labeur, R.J. (TU Delft Environmental Fluid Mechanics) Uijttewaal, W.S.J. (TU Delft Environmental Fluid Mechanics) Date 2020 Abstract Breaching flow slides result in a turbidity current running over and directly interacting with the eroding, submarine slope surface, thereby promoting further sediment erosion. The investigation and understanding of this current are crucial, as it is the main parameter influencing the failure evolution and fate of sediment during the breaching phenomenon. In contrast to previous numerical studies dealing with this specific type of turbidity currents, we present a 3D numerical model that simulates the flow structure and hydrodynamics of breaching-generated turbidity currents. The turbulent behavior in the model is captured by large eddy simulation (LES). We present a set of numerical simulations that reproduce particular, previously published experimental results. Through these simulations, we show the validity, applicability, and advantage of the proposed numerical model for the investigation of the flow characteristics. The principal characteristics of the turbidity current are reproduced well, apart from the layer thickness. We also propose a breaching erosion model and validate it using the same series of experimental data. Quite good agreement is observed between the experimental data and the computed erosion rates. The numerical results confirm that breaching-generated turbidity currents are self-accelerating and indicate that they evolve in a self-similar manner. Subject BreachingErosion modelFlow slideLarge eddy simulationSelf-accelerating currentTurbidity currentTurbulence-resolving simulation To reference this document use: http://resolver.tudelft.nl/uuid:94df8abb-494c-4d0c-b4a0-d772221f522f DOI https://doi.org/10.3390/jmse8090728 ISSN 2077-1312 Source Journal of Marine Science and Engineering, 8 (9), 1-23 Part of collection Institutional Repository Document type journal article Rights © 2020 S.M.S. Alhaddad, Lynyrd de Wit, R.J. Labeur, W.S.J. Uijttewaal Files PDF jmse_08_00728.pdf 3.91 MB Close viewer /islandora/object/uuid:94df8abb-494c-4d0c-b4a0-d772221f522f/datastream/OBJ/view