بررسي الگوي دوبعدي جريان در رودخانه با استفاده از مختصات متعامد انحنادار

River flow pattern investigation by curvilinear coordinate systems

Flow pattern investigation in a river needs an applicable tool. For this reason, there is an attempt to prepare a software such as MOBED2 for two-dimensional unsteady flow. As it is known that river boundaries are curvilinear, Navier- Stokes equation solution has been written in curvilinear coordinates and for the best fitting of flow and boundaries basic equations of mass conservation and flow equation are solved by implicit method. For validity of the model a case study on Karkheh river has been carried out. The comparison between the results of observed velocity and water level with corresponding calculated values in two specified points shows a god agreement.