Applied Mathematics and Mechanics (English Edition) ›› 2004, Vol. 25 ›› Issue (2): 186-201.

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MIXED FINITE ELEMENT METHODS FOR THE SHALLOW WATER EQUATIONS INCLUDING CURRENT AND SILT SEDIMENTATION (Ⅱ)——THE DISCRETE-TIME CASE ALONG CHARACTERISTICS

LUO Zhen-dong1,2, ZHU Jiang2, ZENG Qing-cun2, XIE Zheng-hui 2   

  1. 1. Department of Mathematics, Capital Normal University, Beijing 100037, P. R. China;
    2. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, P. R. China
  • Received:2000-08-30 Revised:2003-06-28 Online:2004-02-18 Published:2004-02-18
  • Supported by:
    the National Natural Science Foundation of China (10071052, 49776283);the "Plan of Hundred Talents" of Chinese Academy of Sciences;the National Natural Science Foundation of China for Outstanding Young Scientists (40225015);the Beijing Excellent Talent Special Foundation;the Natural Sciences Foundation of Beijing

Abstract: The mixed finite element(MFE) methods for a shallow water equation system consisting of water dynamics equations,silt transport equation,and the equation of bottom topography change were derived.A fully discrete MFE scheme for the discrete-time along characteristics is presented and error estimates are established.The existence and convergence of MFE solution of the discrete current velocity,elevation of the bottom topography,thickness of fluid column,and mass rate of sediment is demonstrated.

2010 MSC Number: 

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