A two-dimensional morphological model based on a next generation circulation solver I: Formulation and validation

作者：Kuang, Cui-Ping^*; Chen, Si-Yu; Zhang, Yu; Gu, Jie; Pan, Yi; Huang, Jing

来源：Coastal Engineering, 2012, 59(1): 1-13.

DOI：10.1016/j.coastaleng.2011.03.009

• Coastal zone
• Morphodynamic model
• Semi-implicit method
• Eulerian-Lagrangian method
• CurWac2D-Sed
• Unstructured SWAN

This paper presents an effective morphological modeling system with new module designs. A two dimensional (2D) morphological model which contains grid generation module, circulation module, wave module, transport module and bed evolution module has been developed and validated. The grid generation module is based on unstructured triangular grid with second order accuracy achieved through cell reconstruction using multiple least square methods. The circulation module is based on semi-implicit Eulerian-Lagrangian method, which is stable and free from Courant-Friedrichs-Lewy (CFL) constraint. Using the cell reconstruction, the circulation module relaxes the grid orthogonality requirement of previous similar circulation solvers. In the wave module, unstructured SWAN model was incorporated to simulate the effects of current-wave interaction simultaneously. The transport module is developed with finite-volume method with high-order resolution. The modeling of suspended sediment transport and updating of morphological evolution is contained in the sediment-morphology module. The morphological modeling system is referred as CurWaC2D-Sed. Following the detailed description of each module, a number of theoretical and laboratory validation studies were conducted. The CurWaC2D-Sed model has shown to perform well in all those validation tests. The applications of this model to the field cases are presented in a companion paper.

• 出版日期2012-1
• 单位上海海洋大学; 中国矿业大学（北京）; 同济大学