In this paper, Forchheimer equation is used as the constitutive equation for flow through rockfill, and the non-linear two-dimensional governing equation with free surface is solved by a new finite element method in a fixed grid. The model is verified by applying it to different flow conditions. The first scenario, which is assumed to be one-dimensional with analytical solution available for it, is used to verify the developed code. Other scenarios, which are two-dimensional free surface tests on a laboratory rockfill, are used to verify the model. The model shows satisfactory performance in this regard. For example, on average, a mean absolute relative error of about 2.3%, in terms of pressure head was found to exist between modelling results and observed values. Further capabilities of the model are discussed by simulating overflow through self– spillway rockfill dams.
Keywords: Finite element, Method, Fixed grid, Non-Darcy flow, Non-linear flow, Rock fill dam
S. M. Hosseini and E. Sonei, (2022). Seepage Analysis through Rockfill Dams by Finite Element Method in a Fixed Gird. Journal of Advanced Materials in Engineering (Esteghlal), 22(1), 91-108.
MLA
S. M. Hosseini and E. Sonei. "Seepage Analysis through Rockfill Dams by Finite Element Method in a Fixed Gird", Journal of Advanced Materials in Engineering (Esteghlal), 22, 1, 2022, 91-108.
HARVARD
S. M. Hosseini and E. Sonei, (2022). 'Seepage Analysis through Rockfill Dams by Finite Element Method in a Fixed Gird', Journal of Advanced Materials in Engineering (Esteghlal), 22(1), pp. 91-108.
VANCOUVER
S. M. Hosseini and E. Sonei, Seepage Analysis through Rockfill Dams by Finite Element Method in a Fixed Gird. Journal of Advanced Materials in Engineering (Esteghlal), 2022; 22(1): 91-108.
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