洪水流の横断方向流速差がもたらす付加的抵抗の評価

抄録

Laboratory tests were performed to evaluate, the lateral momentum transfer between two flow regions having different velocities. In the tests, media with very high porosity were put on a part of a test channel in such a manner that lateral discontinuity in velocty was made. The experimental results showed that the mixing coefficient f expressing intensity of the momentum transfer changed remarkably depending on the position, width and permeability of the porous media. On the basis of the mechanism of fluid exchange between the two regions, prediction methods of the mixing coefficient f were developed.