Validation and Application of a 2d Model to Channels With Complex Geometry

Jia, Yafei; Wang, Sam S. Y.; Xu, Yichun

doi:10.1142/s146587630200054x

Cited by 83 publications

(35 citation statements)

References 3 publications

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“…CCHE2D solves dynamic processes, e.g., river flows, non-uniform sediment transport, and morphologic processes, with the depth-integrated Reynolds equations, transport equations, sediment sorting equation, bedload and bed deformation equations. More importantly, two dispersion terms were included in the governing equations, which lead to a better simulation of particle movement in curved channels with large sinuosity (Jia et al, 1999(Jia et al, , 2002. This model is based on the efficient element method, a collocation approach of the weighted residual method.…”

Section: Numerical Modelmentioning

confidence: 99%

Distribution of primary and secondary currents in sine-generated bends

2018

WSA

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The secondary circulation in a meandering channel redistributes the velocity over the bend. However, the shift of primary flow by secondary currents is not quantitatively understood, due to the difficulty in isolating the role of curvature-driven secondary flow from that of topography-driven secondary flow in bed-deformed meanders. The influences of curvaturedriven and topography-driven secondary currents on the redistribution of primary flow in sine-generated meandering channels were examined by CCHE2D. The model is calibrated using data measured in two sets of laboratory experiments including flat-bed flow and mobile-bed flow. Analysis indicated that topography-induced current mainly contributes to the redistribution of primary flow from inner to outer bank in the curved channels, rather than the secondary flow driven by curvature.

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Section: Numerical Modelmentioning

confidence: 99%

Distribution of primary and secondary currents in sine-generated bends

2018

WSA

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“…The second approach is the suspended load transport, which simulates suspended load and treats bed -material load as suspended load. The third approach is to simulate bed load and suspended load separately (Jia and Wang 1999, Jia et al 2002, Wu 2008). …”

Section: Governing Equationsmentioning

confidence: 99%

Numerical Modeling of Flow and Sediment Transport in Lake Pontchartrain due to Flood Release from Bonnet Carré Spillway

Chao¹,

Jia²,

Hossain³

2013

Sediment Transport Processes and Their Modelling Applications

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“…(4) is concerned, the present hydrodynamic model provided users with two eddy viscosity turbulence models pertaining to the characteristics of waves (Ding et al 2006), and a k-ε model (Jia et al 2002 ).…”

Section: Inside Surf Zonementioning

confidence: 99%

“…This integrated coastal process model (CCHE2D-Coast) has been built in a well-established numerical software package called CCHE2D (Jia et al 2002), which is an extensively verified and validated tool to analyze 2-D shallow water flows, sediment transport, and water quality, with natural flow boundary conditions. Similar to the CCHE2D hydrodynamic model, the wave and hydrodynamic models in CCHE2D-Coast were discretized in a non-orthogonal grid system so that the models have more flexibility to simulate physical variables in complex coastal zones with irregular coastlines.…”

Section: Numerical Approaches For Solving Hydrodynamic Equationsmentioning

confidence: 99%

“…Similar to the CCHE2D hydrodynamic model, the wave and hydrodynamic models in CCHE2D-Coast were discretized in a non-orthogonal grid system so that the models have more flexibility to simulate physical variables in complex coastal zones with irregular coastlines. A time-marching algorithm proposed by Jia et al (2002) was used to compute tidal and wave-induced currents. A validated algorithm in CCHE2D for the treatment of wetting and drying processes was directly used for predicting the tidal flat variations and coastal inundations.…”

Section: Numerical Approaches For Solving Hydrodynamic Equationsmentioning

confidence: 99%

See 1 more Smart Citation

Modeling of Wave-Current Interaction Using a Multidirectional Wave-Action Balance Equation

Ding

Wang

2011

Int. Conf. Coastal. Eng.

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This study presents an integrated numerical model to simulate wave deformation/transformation in tidal inlets or river mouths with ambient currents (e.g. tidal currents, river inflows) by carefully modeling the effect of wave-current interaction. A multidirectional wave-action balance equation is used to compute random/directional wave processes such as diffraction, refraction, shoaling, wave breaking, as well as wave-current interaction. This wave action model is coupled with a two-dimensional hydrodynamic model, the feedback effect of wave and current can be effectively simulated. This model is validated by simulating wave laboratory experiments in an inlet entrance, and waves and tidal currents in Grays Harbor, WA by using available field observation data in 1999. The capabilities of the wave model for simulating wave-current interaction and the corresponding breaking effect are confirmed in the study.

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Validation and Application of a 2d Model to Channels With Complex Geometry

Cited by 83 publications

References 3 publications

Distribution of primary and secondary currents in sine-generated bends

Distribution of primary and secondary currents in sine-generated bends

Numerical Modeling of Flow and Sediment Transport in Lake Pontchartrain due to Flood Release from Bonnet Carré Spillway

Modeling of Wave-Current Interaction Using a Multidirectional Wave-Action Balance Equation

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