A NEW HIGH ORDER SCHEME FOR CONVECTION EQUATION AND ITS APPLICATION  

作　　者：Zhang Xiao-feng (Department of River Engineering, Wuhan University, Wuhan 430072, China) Zhang Hong-wu (Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China) Tamotsu Takahashi, Hajime Nakagawa (Disaster Prevention Research 

出　　处：《Journal of Hydrodynamics》2002年第1期81-86,共6页水动力学研究与进展B辑（英文版）

摘　　要：With the undetermined coefficient method, a new high order scheme for convection equation named as HAUC was worke d out. The accuracy of the new scheme was analyzed by comparing the computed res ults with the exact solutions of 1-D pure convection equation and nonlinear con vection equation. The effectiveness of the HAUC was also examined by comparing w ith the results obtained by other schemes. Finally, it was applied to simulate 1 -D dam break flow with differenct ratios of initial upstream water depth to do wnstream one. The results show that the scheme has the ability to simulate both undular bores and moving hydraulic jumps.With the undetermined coefficient method, a new high order scheme for convection equation named as HAUC was worke d out. The accuracy of the new scheme was analyzed by comparing the computed res ults with the exact solutions of 1-D pure convection equation and nonlinear con vection equation. The effectiveness of the HAUC was also examined by comparing w ith the results obtained by other schemes. Finally, it was applied to simulate 1 -D dam break flow with differenct ratios of initial upstream water depth to do wnstream one. The results show that the scheme has the ability to simulate both undular bores and moving hydraulic jumps.

关 键 词：higher order scheme undetermined co efficient method dam break flow undular bore moving hydraulic jump 

分 类 号：O351[理学—流体力学]