Development and Application of a 2D Tidal Flow Model with an Unstructured Mesh

Abstract:

A two dimensional tidal flow numerical model is developed based on models like UnTrim type.The model takes the two dimensional shallow water equations as governing equations and uses unstructured triangular mesh on horizontal plane to enhance the efficiency and accuracy of computation.Then the simulation of tidal flow and the wetting and drying is verified by several channel tests.The results show that the model is effective and stable.Then the model is applied to the simulation of the hydrodynamic process in the Yangtze Estuary,and the model is calibrated and validated through the observed field data.The result shows a good agreement between the simulation and computation.

Key words:two dimensional tidal flow numerical model; unstructured triangular mesh; the Yangtze Estuary; hydrodynamic; UnTrim type model