Bottom velocity computation method around structures and local scour calculation method coupled with the non-equilibrium sediment transport model

2014 Fiscal Year Final Research Report

• Project/Area Number: 23560611
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Chuo University
• Principal Investigator: UCHIDA Tatsuhiko 中央大学, 公私立大学の部局等, 准教授 (00379900)
• Project Period (FY): 2011-04-28 – 2015-03-31
• Keywords: 非静水圧準三次元解析 / 渦度方程式 / 底面流速 / 局所洗掘 / 河川構造物 / 複断面蛇行流路 / 非平衡流砂量式 / 小規模河床波

Outline of Final Research Achievements

This study developed the general bottom velocity calculation method which can calculate vertical distributions of velocity and pressure in the depth integrated model to calculate three dimensional flow and local scouring around structures. The method was validated for rapidly varied flows over structures and 3D vortex motions with the horse show vortex around a pier. This study also developed a non-equilibrium bed load formula based on momentum equations of sediment particles moving as bed load. The bed variation calculation method coupling with the bottom velocity calculation method was successfully applied to bed variation problems which have been difficult to be calculated by depth integrated model, such as various bed form calculation, bed variation in a compound meandering channel, local scouring around structures.

Free Research Field

水工水理学