Abstract
The goal of study described in this paper is to develop the three dimensional analytical model to simulate a flow around a porous structures. The VOF method was used for the free surfacce flow field considering the future applicability to the rapid changes of the flow such as a surge flow. The flow in porous media was modeled by the Brinkman-Forchheimer extended Darcy's equation. As the experimental verification, three dimensional velocities around a spur dike were measured by using Acoustic-Doppler Velocimeter (ADV). The numerically obtained flow profile around a permeable spur dike was compared with the experimental results. It is confirmed that agreement between proposed numerical result and experiment is good under sub-critical flow condition. Some limitations according to mesh size and boundaries were exposed, nevertheless applicability of the model was proved. The present study enables the future simulation of rapidly varied flow around permeable hydraulic structures.
