scholarly journals Implementation and comparison of the recent three-dimensional radiation stress theory and vortex-force formalism in an unstructured-grid coastal circulation model

2020 ◽  
Vol 240 ◽  
pp. 106771 ◽  
Author(s):  
Meng Xia ◽  
Miaohua Mao ◽  
Qianru Niu
Keyword(s):  
Unstructured Grid ◽  
Three Dimensional ◽  
Circulation Model ◽  
Coastal Circulation ◽  
Radiation Stress ◽  
Stress Theory ◽  
Coastal Circulation Model

scholarly journals Stabilized Formulation for Modeling the Erosion/Deposition Flux of Sediment in Circulation/CFD Models

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 197 ◽  
Author(s):  
Yi-Ju Chou ◽  
Yun-Chuan Shao ◽  
Yi-Hao Sheng ◽  
Che-Jung Cheng
Keyword(s):  
Transport Model ◽  
Three Dimensional ◽  
Circulation Model ◽  
Sediment Concentration ◽  
Dry Density ◽  
Deposition Flux ◽  
Model Stability ◽  
Cfd Models ◽  
Bottom Boundary Condition ◽  
Coastal Circulation Model

In field-scale modeling, when the resuspension of sediment is modeled using a hydrodynamic model, a standard and common approach is to add a resuspension flux as the bottom boundary condition in the transport model. In this study, we show that the way of simply imposing an empirical bottom erosion formula as the flux is actually unrealistic. Its inability to stabilize the sediment concentration can cause excessive suspension fluxes in some extreme cases. Moreover, we present a modified erosion/deposition formula to model the resuspension of sediment. The formulation is based on volume conservation in the presence of erosion/deposition near the bottom. By taking into account the prescribed dry density of the bed material, the proposed formulation is able to produce realistic near-bed concentrations while ensuring model stability. The formulation is then tested in a one-dimensional vertical model and field modeling cases using a three-dimensional coastal circulation model. We show that the modified formulation is particularly important in modeling mud resuspension subject to the large bottom stress, which can be a result of waves or a strong river discharge.

Comprehensive coastal circulation model with application to the Gulf of Maine

1996 ◽  
Vol 16 (7) ◽  
pp. 875-906 ◽  
Author(s):  
Daniel R. Lynch ◽  
Justin T.C. Ip ◽  
Christopher E. Naimie ◽  
Francisco E. Werner
Keyword(s):  
Gulf Of Maine ◽  
Circulation Model ◽  
Coastal Circulation ◽  
Coastal Circulation Model

scholarly journals BASIC STUDY ON APPLICABILITY OF A COASTAL CIRCULATION MODEL WITH UNSTRUCTURED GRIDS TO STORM SURGE SIMULATIONS

2012 ◽  
Vol 68 (2) ◽  
pp. I_858-I_863 ◽  
Author(s):  
Yukihiro KINASHI ◽  
Masaru YAMASHIRO ◽  
Shintaro HIMENO ◽  
Toshio NAKANO ◽  
Masaki YOKOTA ◽  
...  
Keyword(s):  
Storm Surge ◽  
Unstructured Grids ◽  
Circulation Model ◽  
Coastal Circulation ◽  
Basic Study ◽  
Coastal Circulation Model
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