3-D FLOW SIMULATION OF AN ICE-HARBOR FISHWAY
Fishways are hydraulic structures that enable fish to overcome obstructions to their spawning and other migrations. This paper presents a 3-D Volume of Fluid method (VOF) applied for the flow in an Ice-Harbor fishway. In the 3-D VOF, 3-D incompressible continuity equation and Navier-Stokes (N-S) equations are solved incorporated with a convective equation of VOF function. The donor-cell scheme is employed to diseretize the convective terms of N-S equations and the donor-accepter scheme characterizing the VOF is applied for diseretization of the equation of VOF function. As for other spatial differencing terms, the second order central difference approximation is used. A successive-over-relaxation (SOR) method is used for advancing the pressure and velocities in time throughout the computational cells. The fishway used is a model of the fishway installed at Akaishi second Headwork in Akaishi River, Aomori, Japan. Field observation of flow structure was also conducted to obtain the data for validation of numerical results. The numerical model was able to reproduce the rapid flow over a notch and through an orifice. Circulating flow behind the non-submerged part of the baffle was also reproduced well. For further quantitative evaluation,modeling efficiency (EF) was introduced. The EF value made clear the longitudinal velocity component was reproduced better than transversal and vertical velocity components.
VOF method pool-and-weir fishway modeling efficiency N-S equation
Fujihara Masayuki Akimoto Mai Izumi Mattashi
Faculty of Agriculture, Ehime Univeristy, 3-5-7 Tarumi, Matsuyama,Ehime 790-8566, Japan Sansui Consultant, Shimogyo-ku, Kyoto, Japan Faculty of Agriculture and Life Science, Hirosaki University 3 Bunkyo-cho, Hirosaki, Aomori 036-8560
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
2241-2246
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）