سال انتشار: ۱۳۹۱

محل انتشار: نهمین کنگره بین المللی مهندسی عمران

تعداد صفحات: ۷

نویسنده(ها):

E. Alamatian – Assistant Professor, Khavaran Institute of Higher Education, Mashhad, Iran
M. R. Jafarzadeh – Professor, Department of Civil Engineering, Ferdowsi University of Mashhad, Iran

چکیده:

In this article, flow patterns in a channel with a side concavity are studied numerically. The twodimensional depth-averaged saint venant equations, including the turbulence terms, are solved. Thealgorithm applies the finite volume method of Roe-TVD with unstructured triangular cells. Three depthaveraged turbulence models, including the mixing length, k  and algebraic stress model (ASM) are used to close the hydrodynamic equations. The numerical results are compared with the availablenumerical and experimental data. It is clearly shown that the two-dimensional finite volume method ofRoe-TVD using the shallow water equations can estimate the flow depth variations and vortices in a side concavity, successfully. It is concluded that by increasing the aspect ratio the water depth enhances within the concavity section and the finite volume method of Roe-TVD with the ASM gives the best results