Author(s): Yaoxin Zhang; Yafei Jia; Tingting Zhu
Linked Author(s): Yaoxin Zhang
Keywords: Two-dimensional hydrodynamic model; Depth-integrated; FVM; Hybrid; Unstructured mesh; Validation
Abstract: This paper presents a two-dimensional depth-integrated hydrodynamic model for surface flow simulations, the unsteady depth-integrated Reynolds equations are solved using Finite Volume Method (FVM) on a hybrid (triangles and quadrilaterals) unstructured mesh system with collocated variable arrangement. In this model, a new evaluation method for computing the gradients at the cell edges was proposed to improve the solution due to mesh irregularity and non-uniformity. This new second-order method is computing-efficient, since no interpolation for variables to cell vertices is necessary. The robustness and accuracy of the present model have been demonstrated by one experimental case and an application to a natural river with complex shape.
Year: 2013