مدلسازي عددي جريان در كانال روباز به روش رديابي سطح آزاد

Numerical modeling for flow in open channel with surface tracking method

In this paper a numerical model has been introduced to solve the flow in open channels. The algorithm of this numerical model was developed in such a manner that prevents the instabilities, which are produced by the surface waves. With this model, the effects of shear stresses on the variations of the free surface elevation, especially in the regions of stronger shear stresses, were studied for three different open channels. Also the effect of Froud number increasing was studied. The numerical results showed that by increasing the Froud number the accuracy of the model was reduced. The details of numerical procedure were studied in a case, which convergence was failed.