国外模型

  Delft3D

  MIKE

  POM

  CCHE

数值模拟知识

  模拟规程

国外模型：CCHE-TIDE

Model Description

The CCHE-TIDE provides an add-in module for CCHE2D to add the capability of simulating tidal flows in estuaries and coastal areas. The CCHE-TIDE extends the use of the CCHE2D for simulating tidal waves, tidal currents, and residual currents under the conditions of incident tidal waves (non-reflective), tributary flows, non-uniform wind force, and Coriolis force. The incident tidal waves at open-sea boundaries can be specified as time series of observed tidal levels or a combination of tidal constituents. In particular, the model provides non-reflective open boundary conditions for the cases that the reflective waves need to be taken into consideration. The CCHE-

TIDE has been tested and validated using various laboratory and field data.

One of the ongoing projects in the research group is to develop a module for the CCHE3D model for simulation of three-dimensional tidal flows in large-scale and complex bathymetries. The CCHE3D hydrodynamic model together with the tide simulation module can simulate three-dimensional tidal waves, tidal currents, and residual currents under the conditions of incident tidal waves (non-reflective), tributary inflows, wind field, and Coriolis force.

Both 2D and 3D tidal models can simulate long-wave tidal flows and short-wave oscillatory free-surface flows.

Main Features of CCHE-TIDE

The two-dimensional CCHE-TIDE module has the ability to

• Simulate tidal levels, tidal currents, residual currents in estuaries and coastal areas with complex bathymetries and boundary conditions;

• Consider different external forces, e.g., non-uniform wind forces, Coriolis force, complex tributary inflows, etc;

• simulate non-reflective open boundary conditions for the cases that the reflective waves need to be taken into consideration;

• Simulate sediment transport by different empirical models in riverine and coastal/estuarine region.

The three-dimensional CCHE-TIDE module has the ability to
• Simulate three-dimensional unsteady free surface flows with the assumption of hydrostatic pressure or non-hydrostatic pressure;

• Simulate three-dimensional oscillatory free surface flows with long and/or short periods

• Model three-dimensional tidal flows in large-scale complex bathymetries and boundaries;

• Ability to handle non-reflective boundary conditions on open boundaries.

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