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Apr 26, 2012
A Fine Sediment Transport Modeling Framework and its Application to Fluid Mud Processes
Authors: Tian-Jian Hsu and Minwoo SonAuthor Affiliations
Publication: Coastal Sediments '07
Abstract
A fine sediment transport modeling framework for estuary and coastal environments is developed based on simplified multiphase formulation. The model incorporates turbulence-sediment interactions in a two-equation turbulence closure and a rheology closure based on concentrated viscous suspension. The model has been demonstrated to capture the characteristics of tidal driven lutocline behavior observed at Amazon shelf and wave-supported gravity-driven mudflows observed at Po River prodelta. However, these results are obtained by specifying an averaged floe diameter that is independent of flow condition. The floc density is then calculated by a prescribed fractal dimension. In this paper, we report a new but preliminary extension of this model with a more realistic formulation of floc dynamics for steady equilibrium condition. It is found that detailed floc dynamics is sensitive to the predicted suspended mud concentration and flow rate under a steady current.
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© 2007 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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Tian-Jian Hsu
University of Florida, Civil and Coastal Engineering, Gainesville, FL 32611
Minwoo Son
University of Florida, Civil and Coastal Engineering, Gainesville, FL 32611
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