CFD-DEM modeling of turbidity current propagation in channels with two different topographic configurations

نویسندگان

چکیده

Submarine turbidity currents are a special type of sediment gravity flow responsible for turbidite deposits, attracting great interests from scientists and engineers in marine petroleum geology. This paper presents fully coupled computational fluid dynamics (CFD) discrete element method (DEM) model to quantitatively analyze the current propagation channels with two different topographic configurations. An appropriate drag force is first incorporated CFD-DEM scheme, benchmark cases, including single-particle sedimentation case an immersed granular collapse case, conducted verify accuracy developed model. The then employed investigate particle flowing over flat bed (FB), three obstacle-placed beds heights (OPB, OPB_1 OPB_2). results indicate that front position FB well consistent classic lock-exchange experiment. Results also show presence obstacle can clearly diminish inter-particle collisions kinetic energy, weaken particle-fluid interactions, further make more particles settle obstacle. Increase height result diverse morphology fluids, intensify influences on currents. We our models enable reproducing typical process propagation, provide valuable insights understanding turbidite-related geological phenomena point view particulate flow.

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ژورنال

عنوان ژورنال: Frontiers in Marine Science

سال: 2023

ISSN: ['2296-7745']

DOI: https://doi.org/10.3389/fmars.2023.1208739