Development of an Implicit Numerical Model for Calculation of SUB-and Super-Critical Flows
- سال انتشار: 1384
- محل انتشار: ماهنامه بین المللی مهندسی، دوره: 18، شماره: 1
- کد COI اختصاصی: JR_IJE-18-1_008
- زبان مقاله: انگلیسی
- تعداد مشاهده: 159
نویسندگان
Civil & Environmental Engineering, Amirkabir University of Technology (Tehran Polytec
Civil Engineering, Yazd University
Civil Engineering, Amirkabir University of Technology
چکیده
A two dimensional numerical model of shallow water equations was developed to calculate sub and super-critical open channel flows. Utilizing an implicit scheme the steady state equations were discretized based on a control volume method. Collocated grid arrangement was applied with a SIMPLEC like algorithm for depth-velocity coupling. A power law scheme was used for discretization of convection and diffusion terms. Underrelaxation factors were introduced in the model to prevent divergence. Momentum interpolation was used in calculating velocities on cell faces to avoid checker board water surface fluctuation in the collocated grid. The model was verified in different cases including complex water surface profiles and hydraulic jumps. The results are compared with experimental and analytical data and the necessary values of under relaxation factors for a converged solution are discussed. No artificial viscosity was required, which is the advantage of the present model.کلیدواژه ها
Shallow, Water, Under, relaxation, Sub, Critical, Super, Implicit, Numerical Modelاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.