QUASI-3D SOLVER OF MEANDERING RIVER FLOWS BY CIP-SOROBAN SCHEME IN CYLINDRICAL COORDINATES WITH SUPPORT OF BOUNDARY FITTED COORDINATE METHOD
A new numerical solver is developed for the quasi-3D flow model to simulate meandering fiver flows. This solver can investigate the flows in an arbitrary curved fiver channel, by means of the adaptive CIP-Soroban (CIP-S) scheme in a cylindrical coordinate system with support of a boundary fitted coordinate (BFC) system. Time development of water velocity in an advection phase is computed by the orthogonal curvilinear coordinate system without any transformation of the governing equations, whereas a non-advection phase such as the continuity equation is solved by the BFC method, so that the mass conservation is fully satisfied and the water level is accurately calculated. From the verification of this solver on the meandering virtual fiver flows compared with the original BFC method, it is shown that the proposed solver accurately predicts the main flow profile in the regularly curved section of the flows, and that the horizontal velocity vectors both at the free-surface and at the bottom are reasonably predicted with the effect of the secondary currents in the curved section of the virtual fiver with some tributary streams.
adaptive CIP-Soroban scheme cylindrical coordinate system boundary fitted coordinate (BFC) system meandering fiver flows quasi-3D flow model
Keisuke Yoshida Tadaharu Ishikawa
Tokyo Institute of Technology, Japan
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
951-956
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）