Abstract
Nature-friendly hydraulic structures such as a rubble mound weir have attracted attention in recent years. Therefore, it is important to establish the analytical model to analyze the flow around such a porous weir. The VOF method is used for modeling the flow around a trapezoidal porous weir and Porous Body Model is employed to express a porous part of the weir. The treatment of the resistance force is also examined to express the difference of permeability of a porous weir. The numerical results show that the VOF method can be applied to the flow over an impermeable trapezoidal weir. Moreover, the flow of the porous part was approximately obtained by using the Porous Body Model.
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