Sensitive Analysis of Calculated Mesh for CCHE2D Numerical Model

Abstract: Commonly, for being done a numerical modeling of any natural phenomenon, like as water flow pattern, need to an exquisite and modify calculated mesh. For gaining this standard calculated mesh, different calculated meshes must be analyzed sensitively. Thus, the optimum calculated mesh could be selected. At the present paper, the first, a powerful two dimensional numerical model which is named CCHE2D, was applied to simulate the river flow pattern of a meandering river rich by a 180_channel bend, which is named Khoshk-e-Rud River of Farsan, at the 30th Km of west of ShahreKord. For clarifier simulating of flow pattern, the boundary conditions must be entered on a perfect calculated mesh. At this way, two different theories, like as default, are posed for analyzing of calculated meshes. These theories are: 1-more fining of calculated mesh and 2-more tinning of calculated mesh. Then, the flow pattern was simulated by the CCHE2D model for each two cases and the simulated results of model were compared to estimate data’s. Finally, the results showed that, the best and closest predicted results pertain to the made calculated mesh by 48*200 dimensions and fined width by canceling of flood plain.